Geologic units in Maine (state in United States)

Additional scientific data in this geographic area

Devonian Seboomook Formation (Devonian) at surface, covers 16 % of this area

Devonian Seboomook Formation

Silurian - Ordovician Vassalboro Formation (Silurian - Ordovician) at surface, covers 6 % of this area

Silurian - Ordovician Vassalboro formation

Devonian - Silurian Madrid Formation (Devonian - Silurian) at surface, covers 5 % of this area

Devonian - Silurian Madrid Formation

Devonian granite (Devonian) at surface, covers 4 % of this area

Devonian granite

Silurian Sangerville Formation (Silurian) at surface, covers 3 % of this area

Silurian Sangerville Formation

Silurian undifferentiated pelites and sandstones (Silurian) at surface, covers 2 % of this area

Silurian undifferentiated pelites and sandstones, in part of the Allsbury Formation and in part unnamed

Carboniferous alkali feldspar granite (muscovite accessory mineral) (Carboniferous) at surface, covers 2 % of this area

Muscovite-biotite granite

Devonian granite (Devonian) at surface, covers 2 % of this area

Biotite granite

Devonian Carrabassett Formation (Devonian) at surface, covers 2 % of this area

Devonian Carrabassett Formation

Silurian - Ordovician Carys Mills Formation (Silurian - Ordovician) at surface, covers 2 % of this area

Silurian - Ordovician Carys Mills Formation

Silurian Waterville Formation (Silurian) at surface, covers 2 % of this area

Silurian Waterville Formation

Devonian alkali feldspar granite (Devonian) at surface, covers 2 % of this area

Alkali feldspar-biotite granite

Devonian - Ordovician Flume Ridge Formation (Devonian - Ordovician) at surface, covers 1 % of this area

Devonian - Ordovician Flume Ridge Formation

Devonian Carrabassett Formation, massive pelite member (Devonian) at surface, covers 1 % of this area

Devonian Carrabassett Formation massive pelite member

Devonian - Ordovician Bucksport Formation (Devonian - Ordovician) at surface, covers 1 % of this area

Devonian - Ordovician Bucksport Formation

Silurian - Ordovician Frontenac Formation (Silurian - Ordovician) at surface, covers 1 % of this area

Silurian - Ordovician Frontenac Formation

Ordovician - Precambrian Z Cape Elizabeth Formation (Ordovician - Precambrian Z) at surface, covers 1 % of this area

Ordovician - Precambrian Z Cape Elizabeth Formation

Ordovician - Cambrian unnamed sedimentary rocks (Ordovician - Cambrian) at surface, covers 1 % of this area

Ordovician - Cambrian unnamed sedimentary rocks

Devonian - Silurian Rindgemere Formation lower member (Devonian - Silurian) at surface, covers 1 % of this area

Devonian - Silurian Rindgemere Formation lower member

Devonian granite (muscovite accessory mineral) (Devonian) at surface, covers 0.9 % of this area

Muscovite-biotite granite undivided

Precambrian gneisses of the Chain Lakes Massif (Precambrian) at surface, covers 0.9 % of this area

Precambrian gneisses of the Chain Lakes Massif

Devonian gabbro/diorite/ultramafic rocks - quartz diorite (Devonian) at surface, covers 0.9 % of this area

Devonian gabbro/diorite/ultramafic rocks to biotite quartz diorite - gabbro, diorite, ultramafic rocks, biotite monzodiorite, biotite syenite, and biotite quartz diorite.

Ordovician - Precambrian Z Cushing Formation (Ordovician - Precambrian Z) at surface, covers 0.9 % of this area

Ordovician - Precambrian Z Cushing Formation

Ordovician Winterville Formation (Ordovician) at surface, covers 0.8 % of this area

Ordovician Winterville Formation

Penobscot Formation (Ordovician - Cambrian) at surface, covers 0.8 % of this area

Penobscot Formation

Devonian Ironbound Mountain Formation (Devonian) at surface, covers 0.8 % of this area

Devonian Ironbound Mountain Formation

Silurian Sangerville Formation, Patch Mountain member (Silurian) at surface, covers 0.8 % of this area

Silurian Sangerville Formation Patch Mountain member

Ordovician - Cambrian Dead River Formation, lower member (Ordovician - Cambrian) at surface, covers 0.7 % of this area

Ordovician - Cambrian Dead River formation lower member

Ordovician - Cambrian Saint Daniel Formation (Ordovician - Cambrian) at surface, covers 0.7 % of this area

Ordovician - Cambrian Saint Daniel formation

Cambrian Hurricane Mountain Formation (Cambrian) at surface, covers 0.7 % of this area

Cambrian Hurricane Mountain Formation

Devonian gabbro/diorite/ultramafic rocks (Devonian) at surface, covers 0.7 % of this area

Devonian gabbro/diorite/ultramafic rocks

Ordovician - Precambrian Z Ellsworth formation (Ordovician - Precambrian Z) at surface, covers 0.6 % of this area

Ordovician - Precambrian Z Ellsworth formation

Devonian Tarratine Formation (Devonian) at surface, covers 0.6 % of this area

Devonian Tarratine Formation

Silurian Sangerville Formation, Anasagunticook member (Silurian) at surface, covers 0.6 % of this area

Silurian Sangerville Formation Anasagunticook member

Silurian Smyrna Mills Formation (Silurian) at surface, covers 0.6 % of this area

Silurian Smyrna Mills Formation

Devonian quartz monzonite (hornblende accessory mineral) (Devonian) at surface, covers 0.6 % of this area

Hornblende-biotite quartz monzonite

Ordovician Madawaska Lake Formation (Ordovician) at surface, covers 0.6 % of this area

Ordovician Madawaska Lake Formation

Silurian Smalls Falls Formation (Silurian) at surface, covers 0.6 % of this area

Silurian Smalls Falls Formation

Devonian granodiorite (muscovite accessory mineral) (Devonian) at surface, covers 0.6 % of this area

Muscovite-biotite granodiorite

Devonian Seboomook Formation, unnamed pelite (Devonian) at surface, covers 0.5 % of this area

Devonian Seboomook Formation unnamed pelite

Ordovician quartz monzonite (hornblende accessory mineral) (Ordovician) at surface, covers 0.5 % of this area

Ordovician quartz monzonite (hornblende accessory mineral)

Silurian unnamed limestone (Silurian) at surface, covers 0.5 % of this area

Silurian unnamed limestone

Carboniferous alkali feldspar granite (muscovite accessory, abundant sedimentary inclusions) (Carboniferous) at surface, covers 0.5 % of this area

Muscovite-biotite granite

Ordovician unnamed volcanic rocks (Ordovician) at surface, covers 0.5 % of this area

Ordovician unnamed volcanic rocks

Devonian granite (muscovite accessory mineral) (Devonian) at surface, covers 0.5 % of this area

Muscovite-biotite granite

Devonian Swanback Formation (Devonian) at surface, covers 0.5 % of this area

Devonian Swanback Formation

Cambrian Grand Pitch Formation (Cambrian) at surface, covers 0.5 % of this area

Cambrian Grand Pitch Formation

Devonian tonalite (Devonian) at surface, covers 0.5 % of this area

Biotite tonalite

Silurian New Sweden Formation (Silurian) at surface, covers 0.5 % of this area

Silurian New Sweden Formation

Silurian Perry Mountain Formation (Silurian) at surface, covers 0.4 % of this area

Silurian Perry Mountain formation

Devonian gabbro (Devonian) at surface, covers 0.4 % of this area

Devonian gabbro

Undifferentiated volcanic rocks of the Spider Lake and Chandler Pond Formations (Devonian - Silurian) at surface, covers 0.4 % of this area

Undifferentiated volcanic rocks of the Spider Lake and Chandler Pond Formations

Ordovician - Precambrian Z metasedimentary and metavolcanic rocks of the Passagassawakeag block (Ordovician - Precambrian Z) at surface, covers 0.4 % of this area

Ordovician - Precambrian Z metasedimentary and metavolcanic rocks of the Passagassawakeag block

Devonian - Silurian unnamed sedimentary rocks (Devonian - Silurian) at surface, covers 0.4 % of this area

Devonian - Silurian unnamed sedimentary rocks

Ordovician sandstone and pelite of the Depot Mountain sequence (Ordovician) at surface, covers 0.4 % of this area

Ordovician sandstone and pelite of the Depot Mountain sequence

Devonian Seboomook Formation Day Mountain member (Devonian) at surface, covers 0.4 % of this area

Devonian Seboomook Formation Day Mountain member

Devonian - Silurian undifferentiated sedimentary rocks of the Spider Lake, Chandler Pond and Third Lake Formations (Devonian - Silurian) at surface, covers 0.4 % of this area

Devonian - Silurian undifferentiated sedimentary rocks of the Spider Lake, Chandler Pond and Third Lake Formations

Devonian granite (hornblende accessory mineral) (Devonian) at surface, covers 0.4 % of this area

Hornblende-biotite granite

Ordovician - Cambrian Chase Brook Formation (Ordovician - Cambrian) at surface, covers 0.4 % of this area

Ordovician - Cambrian Chase Brook Formation

Ordovician Munsungun Lake Formation (Ordovician) at surface, covers 0.4 % of this area

Ordovician Munsungun Lake Formation

Devonian Littleton Formation (Devonian) at surface, covers 0.3 % of this area

Devonian Littleton Formation

Devonian granite (hornblende accessory mineral) (Devonian) at surface, covers 0.3 % of this area

Hornblende-biotite granite undivided

Devonian granite-quartz monzonite (hornblende accessory mineral) (Devonian) at surface, covers 0.3 % of this area

Devonian hornblende-biotite granite to quartz monzonite- hornblende-biotite granite, hornblende-biotite granodiorite, hornblende-biotite tonalite, hornblende-biotite alkali feldspar quartz syenite, hornblende-biotite quartz syenite, and hornblende-biotite quartz monzonite.

Devonian Tomhegan Formation (Devonian) at surface, covers 0.3 % of this area

Devonian Tomhegan Formation

Devonian Seboomook Formation Temple Stream member (Silurian-Devonian) at surface, covers 0.3 % of this area

Devonian Seboomook Formation Temple Stream member

Silurian Frenchville Formation (Silurian) at surface, covers 0.3 % of this area

Silurian Frenchville Formation

Devonian granodiorite (Devonian) at surface, covers 0.3 % of this area

Biotite granodiorite

Silurian Jemtland Formation (Silurian) at surface, covers 0.3 % of this area

Silurian Jemtland Formation

Silurian - Precambrian Z Kittery Formation (Silurian - Precambrian Z) at surface, covers 0.3 % of this area

Silurian - Precambrian Z Kittery Formation

Devonian granodiorite (hornblende accessory mineral) (Devonian) at surface, covers 0.3 % of this area

Hornblende-biotite granodiorite

Silurian Spragueville Formation (Silurian) at surface, covers 0.3 % of this area

Silurian Spragueville Formation

Silurian Sangerville Formation, limestone member (Silurian) at surface, covers 0.3 % of this area

Silurian Sangerville Formation limestone member

Undifferentiated mafic to felsic volcanic rocks (Devonian - Ordovician) at surface, covers 0.3 % of this area

Undifferentiated mafic to felsic volcanic rocks

Silurian Rangeley Formation (Silurian) at surface, covers 0.3 % of this area

Silurian Rangeley formation

Devonian granite (muscovite accessory mineral), tonalite (Devonian) at surface, covers 0.3 % of this area

Devonian granite (muscovite accessory mineral), tonalite

Ordovician Bluffer Pond formation (Ordovician) at surface, covers 0.3 % of this area

Ordovician Bluffer Pond formation

Devonian granite (porphyritic texture) (Devonian) at surface, covers 0.3 % of this area

Biotite granite undivided

Silurian - Precambrian Z Berwick Formation (Silurian - Precambrian Z) at surface, covers 0.3 % of this area

Silurian - Precambrian Z Berwick Formation

Carboniferous granite (muscovite accessory mineral) (Carboniferous) at surface, covers 0.2 % of this area

Muscovite-biotite granite undivided

Silurian Dennys Formation, mafic to felsic volcanic rock member (Silurian) at surface, covers 0.2 % of this area

Silurian Dennys Formation mafic to felsic volcanic rock member

Devonian granite-granodiorite (hornblende accessory mineral) (Devonian) at surface, covers 0.2 % of this area

Devonian granite-granodiorite (hornblende accessory mineral)

Ordovician Quimby Formation (Ordovician) at surface, covers 0.2 % of this area

Ordovician Quimby formation

Devonian - Ordovician Dideguash Formation (Devonian - Ordovician) at surface, covers 0.2 % of this area

Devonian - Ordovician Dideguash Formation

Silurian unnamed sandstone (Silurian) at surface, covers 0.2 % of this area

Silurian unnamed sandstone

Ordovician - Precambrian Z Columbia Falls Formation (Ordovician - Precambrian Z) at surface, covers 0.2 % of this area

Ordovician - Precambrian Z Columbia Falls Formation

Silurian Edmunds Formation (Silurian) at surface, covers 0.2 % of this area

Silurian Edmunds formation

Silurian Quoddy Formation, mafic to felsic volcanic rock member (Silurian) at surface, covers 0.2 % of this area

Silurian Quoddy Formation mafic to felsic volcanic rock member

Devonian Hildreths Formation (Devonian) at surface, covers 0.2 % of this area

Devonian Hildreths Formation

Devonian - Silurian Fish River Lake Formation (Devonian - Silurian) at surface, covers 0.2 % of this area

Devonian - Silurian Fish River Lake Formation

Ordovician unnamed pelite (Ordovician) at surface, covers 0.2 % of this area

Ordovician unnamed pelite

Cambrian Jim Pond Formation, graywacke (Cambrian) at surface, covers 0.2 % of this area

Cambrian Jim Pond Formation graywacke

Ordovician - Cambrian Cookson Formation, sulfidic quartzose sandstone (Ordovician - Cambrian) at surface, covers 0.2 % of this area

Ordovician - Cambrian Cookson Formation sulfidic quartzose sandstone

Devonian gabbro - ultramafic rocks (Devonian) at surface, covers 0.2 % of this area

Devonian gabbro - ultramafic rocks

Ordovician unnamed felsic volcanic rocks (Ordovician) at surface, covers 0.2 % of this area

Ordovician unnamed felsic volcanic rocks

Devonian - Precambrian Z Appleton Ridge Formation (Devonian - Precambrian Z) at surface, covers 0.2 % of this area

Devonian - Precambrian Z Appleton Ridge Formation

Devonian Seboomook Formation Mount Blue member (Devonian) at surface, covers 0.2 % of this area

Devonian Seboomook Formation Mount Blue member

Silurian Waterville Formation, limestone member (Silurian) at surface, covers 0.2 % of this area

Silurian Waterville Formation limestone member

Ordovician - Cambrian Cookson Formation, sulfidic pelite (Ordovician - Cambrian) at surface, covers 0.2 % of this area

Ordovician - Cambrian Cookson Formation sulfidic pelite

Devonian quartz monzodiorite - quartz diorite (pyroxene plus hornblende accessory mineral) (Devonian) at surface, covers 0.2 % of this area

Devonian pyroxene-hornblende quartz monzodiorite and quartz diorite - pyroxene-hornblende-biotite quartz monzodiorite, and pyroxene-hornblende-biotite quartz diorite

Silurian unnamed conglomerate (Silurian) at surface, covers 0.2 % of this area

Silurian unnamed conglomerate

Cambrian Jim Pond Formation, mafic volcanic rocks (Cambrian) at surface, covers 0.2 % of this area

Cambrian Jim Pond Formation mafic volcanic rocks

Devonian - Silurian Fogelin Hill Formation (Devonian - Silurian) at surface, covers 0.2 % of this area

Devonian - Silurian Fogelin Hill Formation

Devonian Eastport Formation, mafic to felsic volcanic member (Devonian) at surface, covers 0.2 % of this area

Devonian Eastport Formation mafic to felsic volcanic member

Devonian - Silurian Castine Formation (Devonian - Silurian) at surface, covers 0.1 % of this area

Devonian - Silurian Castine Formation

Devonian diorite (Devonian) at surface, covers 0.1 % of this area

Biotite diorite

Devonian - Silurian Bell Brook Formation, pelite member (Devonian - Silurian) at surface, covers 0.1 % of this area

Devonian - Silurian Bell Brook Formation pelite member

Ordovician - Cambrian Megunticook Formation (Ordovician - Cambrian) at surface, covers 0.1 % of this area

Ordovician - Cambrian Megunticook Formation

Devonian Traveler Rhyolite Pogy member (Devonian) at surface, covers 0.1 % of this area

Devonian Traveler Rhyolite Pogy member

Devonian Matagamon Sandstone (Devonian) at surface, covers 0.1 % of this area

Devonian Matagamon Sandstone

Silurian Rangeley Formation, "B" member (Silurian) at surface, covers 0.1 % of this area

Silurian Rangeley Formation ""B"" member""

Unnamed volcanic rocks (Devonian - Silurian) at surface, covers 0.1 % of this area

Unnamed volcanic rocks

Devonian granodiorite - quartz syenite (porphyritic texture) (Devonian) at surface, covers 0.1 % of this area

Devonian porphyritic biotite granodiorite to quartz syenite - porphyritic biotite granodiorite, porphyritic biotite tonalite, porphyritic alkali feldspar-biotite quartz syenite, and porphyritic biotite quartz syenite.

Silurian gabbro/diorite/ultramafic rocks (Silurian) at surface, covers 0.1 % of this area

Silurian gabbro/diorite/ultramafic rocks

Silurian undifferentiated sandstones (Silurian) at surface, covers 0.1 % of this area

Silurian undifferentiated sandstones, in part of the Allsbury Formation and in part unnamed

Silurian - Ordovician Dunn Brook Formation (Silurian - Ordovician) at surface, covers 0.1 % of this area

Silurian - Ordovician Dunn Brook formation

Devonian - Silurian Rindgemere Formation upper member (Devonian - Silurian) at surface, covers 0.1 % of this area

Devonian - Silurian Rindgemere Formation upper member

Devonian granodiorite - quartz diorite (Devonian) at surface, covers 0.1 % of this area

Devonian biotite granodiorite to biotite quartz diorite - biotite granodiorite, biotite tonalite, biotite quartz syenite, biotite quartz monzodiorite, and biotite quartz diorite.

Ordovician granite (Ordovician) at surface, covers 0.1 % of this area

Ordovician biotite granite

Ordovician - Cambrian Dead River Formation, upper member (Ordovician - Cambrian) at surface, covers 0.1 % of this area

Ordovician - Cambrian Dead River formation upper member

Ordovician Lobster Mountain volcanic complex (Ordovician) at surface, covers 0.1 % of this area

Ordovician Lobster Mountain volcanic complex

Carboniferous granite undivided (Carboniferous) at surface, covers 0.1 % of this area

Biotite granite

Silurian The Forks Formation (Silurian) at surface, covers 0.1 % of this area

Silurian The Forks Formation

Ordovician - Cambrian Aziscohos Formation (Ordovician - Cambrian) at surface, covers 0.1 % of this area

Ordovician - Cambrian Aziscohos Formation

Silurian - Ordovician Frontenac Formation, Canada Falls volcanic member (Silurian - Ordovician) at surface, covers 0.1 % of this area

Silurian - Ordovician Frontenac Formation Canada Falls volcanic member

Ordovician - Precambrian Z Scarboro and Diamond Island formations (Ordovician - Precambrian Z) at surface, covers 0.1 % of this area

Ordovician - Precambrian Z Scarboro and Diamond Island formations

Devonian Carrabassett Formation, thinly layered member (Devonian) at surface, covers 0.1 % of this area

Devonian Carrabassett Formation thinly layered member

Ordovician quartz diorite (hornblende accessory mineral) (Ordovician) at surface, covers 0.1 % of this area

Ordovician quartz diorite (hornblende accessory mineral)

Devonian unnamed sedimentary rocks (Devonian) at surface, covers 0.1 % of this area

Devonian unnamed sedimentary rocks

Silurian - Ordovician Mattawamkeag Formation (Silurian - Ordovician) at surface, covers 0.1 % of this area

Silurian - Ordovician Mattawamkeag Formation

Ordovician graywacke of the Depot Mountain sequence (Ordovician) at surface, covers 0.1 % of this area

Ordovician graywacke of the Depot Mountain sequence

Traveler Rhyolite, Black Cat Member (Devonian) at surface, covers < 0.1 % of this area

Traveler Rhyolite, Black Cat Member

Silurian Quoddy Formation, pelite member (Silurian) at surface, covers < 0.1 % of this area

Silurian Quoddy formation pelite member

Silurian Unnamed sulfidic pelite (Silurian) at surface, covers < 0.1 % of this area

Silurian Unnamed sulfidic pelite

Ordovician Belle Lake Slate (Ordovician) at surface, covers < 0.1 % of this area

Ordovician Belle Lake Slate

Ordovician - Cambrian Dead River Formation (Ordovician - Cambrian) at surface, covers < 0.1 % of this area

Ordovician - Cambrian Dead River formation

Devonian Chapman Sandstone (Devonian) at surface, covers < 0.1 % of this area

Devonian Chapman Sandstone

Cambrian Jim Pond Formation, quartzwacke and pelite (Cambrian) at surface, covers < 0.1 % of this area

Cambrian Jim Pond Formation, quartzwacke and pelite

Ordovician unnamed sandstone (Ordovician) at surface, covers < 0.1 % of this area

Ordovician unnamed sandstone

Devonian granite (intrusive breccia texture) (Devonian) at surface, covers < 0.1 % of this area

Devonian granite (intrusive breccia texture)

Silurian Leighton Formation, mafic to felsic volcanic rock member (Silurian) at surface, covers < 0.1 % of this area

Silurian Leighton Formation mafic to felsic volcanic rock member

Cambrian Jim Pond Formation (Cambrian) at surface, covers < 0.1 % of this area

Cambrian Jim Pond Formation

Ordovician gabbro/diorite/ultramafic rocks (Ordovician) at surface, covers < 0.1 % of this area

Ordovician gabbro/diorite/ultramafic rocks

Devonian Hedgehog Formation (Devonian) at surface, covers < 0.1 % of this area

Devonian Hedgehog Formation

Devonian unnamed pelite (Devonian) at surface, covers < 0.1 % of this area

Devonian unnamed pelite

Ordovician Ammonoosuc Volcanics (Ordovician) at surface, covers < 0.1 % of this area

Ordovician Ammonoosuc Volcanics

Silurian Rangeley Formation, "C" member (Silurian) at surface, covers < 0.1 % of this area

Silurian Rangeley Formation ""C"" member

Silurian Rangeley Formation, "A" member lithic sandstone" (Silurian) at surface, covers < 0.1 % of this area

Silurian Rangeley Formation ""A"" member lithic sandstone

Silurian unnamed sedimentary rocks (Silurian) at surface, covers < 0.1 % of this area

Silurian unnamed sedimentary rocks

Silurian - Ordovician unnamed pelite (Silurian - Ordovician) at surface, covers < 0.1 % of this area

Silurian - Ordovician unnamed pelite

Silurian Ripogenus Formation (Silurian) at surface, covers < 0.1 % of this area

Silurian Ripogenus Formation

Devonian - Silurian Allagash Lake Formation, basalt and mixed sedimentary rocks (Devonian - Silurian) at surface, covers < 0.1 % of this area

Devonian - Silurian Allagash Lake Formation, basalt and mixed sedimentary rocks

Ordovician - Precambrian Z Spring Point Formation (Ordovician - Precambrian Z) at surface, covers < 0.1 % of this area

Ordovician - Precambrian Z Spring Point Formation

Silurian Sangerville Formation, Anasagunticook member limestone (Silurian) at surface, covers < 0.1 % of this area

Silurian Sangerville Formation Anasagunticook member limestone

Devonian quartz monzonite (muscovite accessory mineral) (Devonian) at surface, covers < 0.1 % of this area

Muscovite-biotite quartz monzonite

Carboniferous gabbro/diorite/ultramafic rocks (Carboniferous) at surface, covers < 0.1 % of this area

Carboniferous gabbro/diorite/ultramafic rocks undivided

Silurian rocks of the Fivemile Brook sequence (Silurian) at surface, covers < 0.1 % of this area

Silurian rocks of the Fivemile Brook sequence

Devonian Tarratine Formation Misery Quartzite (Devonian) at surface, covers < 0.1 % of this area

Devonian Tarratine Formation Misery Quartzite

Silurian - Ordovician Carys Mills Formation, lower member (Silurian - Ordovician) at surface, covers < 0.1 % of this area

Silurian - Ordovician Carys Mills Formation lower member

Ordovician - Precambrian Z Cushing Formation, sulfidic pelite (Ordovician - Precambrian Z) at surface, covers < 0.1 % of this area

Ordovician - Precambrian Z Cushing Formation sulfidic pelite

Devonian - Ordovician unnamed pelite (Devonian - Ordovician) at surface, covers < 0.1 % of this area

Devonian - Ordovician unnamed pelite

Ordovician Chase Lake Formation (Ordovician) at surface, covers < 0.1 % of this area

Ordovician Chase lake formation

Silurian - Precambrian Z Eliot Formation (Silurian - Precambrian Z) at surface, covers < 0.1 % of this area

Silurian - Precambrian Z Eliot Formation

Ordovician Wassataquoik Chert (Ordovician) at surface, covers < 0.1 % of this area

Ordovician Wassataquoik Chert

Devonian - Silurian Daggett Ridge Formation (Devonian - Silurian) at surface, covers < 0.1 % of this area

Devonian - Silurian Daggett Ridge Formation

Devonian granite (granophyric texture) (Devonian) at surface, covers < 0.1 % of this area

Devonian granite (granophyric texture)

Ordovician Chandler Ridge Formation (Ordovician) at surface, covers < 0.1 % of this area

Ordovician Chandler Ridge Formation

Devonian - Silurian Rindgemere Formation lower member, limestone (Devonian - Silurian) at surface, covers < 0.1 % of this area

Devonian - Silurian Rindgemere Formation lower member limestone

Devonian - Silurian Rindgemere Formation lower member, sulfidic pelite (Devonian - Silurian) at surface, covers < 0.1 % of this area

Devonian - Silurian Rindgemere Formation lower member sulfidic pelite

Silurian - Ordovician Carys Mills Formation, pelite member (Silurian - Ordovician) at surface, covers < 0.1 % of this area

Silurian - Ordovician Carys Mills Formation pelite member

Silurian Greenvale Cove Formation (Silurian) at surface, covers < 0.1 % of this area

Silurian Greenvale Cove Formation

Devonian Perry Formation, sandstone member (Devonian) at surface, covers < 0.1 % of this area

Devonian Perry Formation sandstone member

Silurian Quoddy Formation, undifferentiated volcanic rock member (Silurian) at surface, covers < 0.1 % of this area

Silurian Quoddy Formation undifferentiated volcanic rock member

Ordovician - Cambrian Sawmill Formation (Ordovician - Cambrian) at surface, covers < 0.1 % of this area

Ordovician - Cambrian Sawmill Formation

Precambrian Z rocks of Islesboro (Precambrian Z) at surface, covers < 0.1 % of this area

Precambrian Z rocks of Islesboro

Devonian syenite (Devonian) at surface, covers < 0.1 % of this area

Devonian biotite syenite undivided

Devonian quartz monzonite (Devonian) at surface, covers < 0.1 % of this area

Devonian quartz monzonite

Ordovician Benner Hill Formation (Ordovician) at surface, covers < 0.1 % of this area

Ordovician Benner Hill formation

Carboniferous - Devonian unnamed conglomerate and sandstone (Carboniferous and/or Devonian) at surface, covers < 0.1 % of this area

Carboniferous - Devonian unnamed conglomerate and sandstone

Ordovician unnamed sulfidic pelite (Ordovician) at surface, covers < 0.1 % of this area

Ordovician unnamed sulfidic pelite

Cambrian Caucomgomoc Lake Formation, basalt member (Cambrian) at surface, covers < 0.1 % of this area

Cambrian Caucomgomoc Lake Formation, basalt member

Ordovician - Cambrian Hurd Mountain Formation (Ordovician - Cambrian) at surface, covers < 0.1 % of this area

Ordovician - Cambrian Hurd Mountain formation

Precambrian Z North Haven Formation (Precambrian) at surface, covers < 0.1 % of this area

Precambrian Z North Haven Formation

Devonian Eastport Formation, basalt member (Devonian) at surface, covers < 0.1 % of this area

Devonian Eastport Formation basalt member

Ordovician unnamed quartz sandstone and pelite (Ordovician) at surface, covers < 0.1 % of this area

Ordovician unnamed quartz sandstone and pelite

Silurian Maple Mountain Formation (Silurian) at surface, covers < 0.1 % of this area

Silurian Maple Mountain Formation

Cretaceous alkali feldspar granite (Cretaceous) at surface, covers < 0.1 % of this area

Cretaceous alkali feldspar-biotite granite

Ordovician granodiorite (Ordovician) at surface, covers < 0.1 % of this area

Ordovician biotite granodiorite

Cambrian gabbro/diorite/ultramafic rocks (Cambrian) at surface, covers < 0.1 % of this area

Cambrian gabbro/diorite/ultramafic rocks

Ordovician unnamed mafic volcanic rocks (Ordovician) at surface, covers < 0.1 % of this area

Ordovician unnamed mafic volcanic rocks

Cretaceous alkali feldspar quartz syenite (Cretaceous) at surface, covers < 0.1 % of this area

Cretaceous alkali feldspar-biotite quartz syenite

Ordovician - Precambrian Z unnamed sedimentary rocks (Ordovician - Precambrian Z) at surface, covers < 0.1 % of this area

Ordovician - Precambrian Z unnamed sedimentary rocks

Devonian - Silurian Towow Formation (Devonian - Silurian) at surface, covers < 0.1 % of this area

Devonian - Silurian Towow Formation

Devonian Hartin Formation (Devonian) at surface, covers < 0.1 % of this area

Devonian Hartin Formation

Devonian Trout Valley Formation (Devonian) at surface, covers < 0.1 % of this area

Devonian Trout Valley Formation

Ordovician - Precambrian Z Cushing Formation, mafic volcanic member (Ordovician - Precambrian Z) at surface, covers < 0.1 % of this area

Ordovician - Precambrian Z Cushing Formation mafic volcanic member

Silurian Burnt Brook Formation (Silurian) at surface, covers < 0.1 % of this area

Silurian Burnt Brook Formation

Silurian Dennys Formation, basalt member (Silurian) at surface, covers < 0.1 % of this area

Silurian Dennys formation basalt member

Silurian Hersey Formation (Silurian) at surface, covers < 0.1 % of this area

Silurian Hersey formation

Ordovician Shin Brook Formation (Ordovician) at surface, covers < 0.1 % of this area

Ordovician Shin Brook Formation

Precambrian Z Ogier Point Formation (Precambrian) at surface, covers < 0.1 % of this area

Precambrian Z Ogier Point Formation

Devonian - Cambrian unnamed sedimentary rocks (Devonian-Cambrian) at surface, covers < 0.1 % of this area

Devonian - Cambrian unnamed sedimentary rocks

Ordovician - Cambrian unnamed volcanic rocks (Ordovician - Cambrian) at surface, covers < 0.1 % of this area

Ordovician - Cambrian unnamed volcanic rocks

Silurian Hardwood Mountain Formation (Silurian) at surface, covers < 0.1 % of this area

Silurian Hardwood Mountain Formation

Ordovician Kamankeag Formation, basalt and graywacke member (Ordovician) at surface, covers < 0.1 % of this area

Ordovician Kamankeag Formation basalt and graywacke member

Ordovician Kamankeag Formation, pelite member (Ordovician) at surface, covers < 0.1 % of this area

Ordovician Kamankeag Formation pelite member

Ordovician - Precambrian Z Cape Elizabeth Formation, mafic to felsic volcanic member (Ordovician - Precambrian Z) at surface, covers < 0.1 % of this area

Ordovician - Precambrian Z Cape Elizabeth Formation mafic to felsic volcanic member

Tomhegan Formation, Kineo Rhyolite Member, Massive Felsite (Devonian) at surface, covers < 0.1 % of this area

Tomhegan Formation, Kineo Rhyolite Member, Massive Felsite

Ordovician unnamed volcanic and sedimentary rocks (Ordovician) at surface, covers < 0.1 % of this area

Ordovician unnamed volcanic and sedimentary rocks

Silurian undifferentiated conglomerates and coarse-grained sandstones (Silurian) at surface, covers < 0.1 % of this area

Silurian undifferentiated conglomerates and coarse-grained sandstones, in part of the Allsbury Formation and in part unnamed

Silurian Smalls Falls Formation? (Silurian) at surface, covers < 0.1 % of this area

Silurian Smalls Falls Formation?

Ordovician - Cambrian Saint Daniel Formation, quartzite and red and green shale (Ordovician - Cambrian) at surface, covers < 0.1 % of this area

Ordovician - Cambrian Saint Daniel formation quartzite and red and green shale

Devonian - Precambrian Z Gonic Formation (Devonian - Precambrian Z) at surface, covers < 0.1 % of this area

Devonian - Precambrian Z Gonic Formation

Silurian Sangerville Formation, conglomerate member (Silurian) at surface, covers < 0.1 % of this area

Silurian Sangerville Formation conglomerate member

Silurian - Ordovician Nine Lake formation (Silurian - Ordovician) at surface, covers < 0.1 % of this area

Silurian - Ordovician Nine Lake formation

Silurian Sangerville Formation, sulfidic pelite member (Silurian) at surface, covers < 0.1 % of this area

Silurian Sangerville Formation sulfidic pelite member

Devonian - Silurian undifferentiated sedimentary rocks in areas of extreme migmatization (Devonian - Silurian) at surface, covers < 0.1 % of this area

Devonian - Silurian undifferentiated sedimentary rocks in areas of extreme migmatization

Devonian - Silurian unnamed conglomerate (Devonian - Silurian) at surface, covers < 0.1 % of this area

Devonian - Silurian unnamed conglomerate

Devonian Mapleton Formation (Devonian) at surface, covers < 0.1 % of this area

Devonian Mapleton Formation

Devonian - Silurian Bell Brook Formation, conglomerate member (Devonian - Silurian) at surface, covers < 0.1 % of this area

Devonian - Silurian Bell Brook Formation, conglomerate member

Ordovician - Precambrian Z calc-silicate rocks of the Passagassawakeag block (Ordovician - Precambrian Z) at surface, covers < 0.1 % of this area

Ordovician - Precambrian Z calc-silicate rocks of the Passagassawakeag block

Ordovician Benner Hill Formation, sulfidic pelite (Ordovician) at surface, covers < 0.1 % of this area

Ordovician Benner Hill Formation sulfidic pelite

Cambrian Loon Stream Formation (Cambrian) at surface, covers < 0.1 % of this area

Cambrian Loon Stream Formation

Cambrian quartz diorite (Cambrian) at surface, covers < 0.1 % of this area

Cambrian biotite quartz diorite

Cretaceous alkali feldspar syenite (Cretaceous) at surface, covers < 0.1 % of this area

Cretaceous alkali feldspar-biotite syenite

Ordovician tuff of the Depot Mountain sequence (Ordovician) at surface, covers < 0.1 % of this area

Ordovician tuff of the Depot Mountain sequence

Devonian Tomhegan Formation Kineo Rhyolite member, tuffs and volcaniclastic rocks (Devonian) at surface, covers < 0.1 % of this area

Devonian Tomhegan Formation Kineo Rhyolite member tuffs and volcaniclastic rocks

Ordovician - Precambrian Z Cape Elizabeth Formation, quartzite member (Ordovician - Precambrian Z) at surface, covers < 0.1 % of this area

Ordovician - Precambrian Z Cape Elizabeth Formation quartzite member

Ordovician - Cambrian Hurd Mountain Formation, basalt member (Ordovician - Cambrian) at surface, covers < 0.1 % of this area

Ordovician - Cambrian Hurd Mountain formation basalt member

Devonian Carrabassett Formation, quartzite member (Devonian) at surface, covers < 0.1 % of this area

Devonian Carrabassett Formation quartzite member

Silurian - Ordovician unnamed sulfidic pelite (Silurian - Ordovician) at surface, covers < 0.1 % of this area

Silurian - Ordovician unnamed sulfidic pelite

Devonian Edmunds Hill Andesite (Devonian) at surface, covers < 0.1 % of this area

Devonian Edmunds Hill Andesite

Ordovician - Cambrian Southeast Cove Formation (Ordovician - Cambrian) at surface, covers < 0.1 % of this area

Ordovician - Cambrian Southeast Cove Formation

Ordovician granite, granodiorite (Ordovician) at surface, covers < 0.1 % of this area

Ordovician biotite granite and granodiorite

Ordovician - Precambrian Z Macworth formation (Ordovician - Precambrian Z) at surface, covers < 0.1 % of this area

Ordovician - Precambrian Z Macworth formation

Devonian granite (pyroxene plus hornblende accessory mineral) (Devonian) at surface, covers < 0.1 % of this area

Pyroxene-hornblende-biotite granite undivided

Devonian - Silurian Bar Harbor Formation (Devonian - Silurian) at surface, covers < 0.1 % of this area

Devonian - Silurian Bar Harbor Formation

Silurian greenstone rocks of the Fivemile Brook sequence (Silurian) at surface, covers < 0.1 % of this area

Silurian greenstone rocks of the Fivemile Brook sequence

Ordovician - Cambrian Penobscot Formation extensively migmatized area (Ordovician - Cambrian) at surface, covers < 0.1 % of this area

Ordovician - Cambrian Penobscot Formation extensively migmatized area

Devonian quartz diorite (hornblende accessory mineral) (Devonian) at surface, covers < 0.1 % of this area

Devonian hornblende-biotite quartz diorite

Silurian Leighton Formation, basalt member (Silurian) at surface, covers < 0.1 % of this area

Silurian Leighton Formation basalt member

Silurian unnamed volcanic and sedimentary rocks (Silurian) at surface, covers < 0.1 % of this area

Silurian unnamed volcanic and sedimentary rocks

Silurian Rangeley Formation, "A""member (Silurian) at surface, covers < 0.1 % of this area

Silurian Rangeley Formation ""A"" member

Penobscot Formation, Basalt Member (Ordovician - Cambrian) at surface, covers < 0.1 % of this area

Penobscot Formation, Basalt Member

Mesozoic foid-bearing syenite (Mesozoic) at surface, covers < 0.1 % of this area

Mesozoic biotite foid-bearing syenite

Silurian Rocky Mountain Quartz Latite (Silurian) at surface, covers < 0.1 % of this area

Silurian Rocky Mountain Quartz Latite

Ordovician - Precambrian Z interbedded pelite and quartz sandstone of the Passagassawakeag block (Ordovician - Precambrian Z) at surface, covers < 0.1 % of this area

Ordovician - Precambrian Z interbedded pelite and quartz sandstone of the Passagassawakeag block

Ordovician Blind Brook Formation (Ordovician) at surface, covers < 0.1 % of this area

Ordovician Blind Brook Formation

Ordovician unnamed sandstone and pelite (Ordovician) at surface, covers < 0.1 % of this area

Ordovician unnamed sandstone and pelite

Precambrian Z Coombs Limestone (Precambrian Z) at surface, covers < 0.1 % of this area

Precambrian Z Coombs Limestone

Cambrian ultramafic rocks (Cambrian) at surface, covers < 0.1 % of this area

Cambrian ultramafic rocks

Cretaceous granite (Cretaceous) at surface, covers < 0.1 % of this area

Cretaceous biotite granite

Ordovician - Precambrian Z Cushing Formation, limestone (Ordovician - Precambrian Z) at surface, covers < 0.1 % of this area

Ordovician - Precambrian Z Cushing Formation limestone

Devonian Perry Formation, basalt member (Devonian) at surface, covers < 0.1 % of this area

Devonian Perry Formation basalt member - Matagamon Sandstone, Perry Formation, Basalt Member

Cretaceous gabbro/diorite/ultramafic rocks (Cretaceous) at surface, covers < 0.1 % of this area

Cretaceous gabbro/diorite/ultramafic rocks

Precambrian Z rocks of Islesboro limestone (Precambrian) at surface, covers < 0.1 % of this area

Precambrian Z rocks of Islesboro limestone

Devonian unnamed lithic sandstone and conglomerate (Devonian) at surface, covers < 0.1 % of this area

Devonian unnamed lithic sandstone and conglomerate

Ordovician - Precambrian Z Spurwink Limestone (Ordovician - Precambrian Z) at surface, covers < 0.1 % of this area

Ordovician - Precambrian Z Spurwink Limestone

Cambrian Jim Pond Formation, felsic volcanic rocks (Cambrian) at surface, covers < 0.1 % of this area

Volcanic and metasedimentary rocks of the ophiolite sequence in central-western Maine are here named the Jim Pond Formation. It consists of a basal chlorite-albite-epidote-actinolite greenstone member with minor metagraywacke, 150 to 500 m thick. Northwest of the Squirtgun fault it is divided into lower and upper units by a metadacite member in the east, 0 to >500 m thick, and a metagraywacke member in the west. The metadacite member is closely associated with hematitic chert iron-formation members. Greenstone is thickly layered with pillowed and massive flows. Patches of altered amphibolite are in contact with the southeastern belt of tonalite of the Boil Mountain Complex. (ME075) Unit description from USGS GEOLEX website (ME078).

Ordovician Chase Lake Formation, conglomerate member (Ordovician) at surface, covers < 0.1 % of this area

Ordovician Chase lake Formation conglomerate member

Ordovician Quimby Formation, pelite member (Ordovician) at surface, covers < 0.1 % of this area

Ordovician Quimby formation pelite member

Devonian - Silurian Allagash Lake Formation, mixed sedimentary rocks (Devonian - Silurian) at surface, covers < 0.1 % of this area

Devonian - Silurian Allagash Lake Formation mixed sedimentary rocks

Devonian - Ordovician Spruce Top Greenstone (Devonian - Ordovician) at surface, covers < 0.1 % of this area

Devonian - Ordovician Spruce Top Greenstone

Devonian Seboomook Formation, unnamed quartzite (Devonian) at surface, covers < 0.1 % of this area

Devonian Seboomook Formation unnamed quartzite

Ordovician - Precambrian Z Jewell Formation (Ordovician - Precambrian Z) at surface, covers < 0.1 % of this area

Ordovician - Precambrian Z Jewell Formation

Devonian Seboomook Formation Day Mountain member, limestone (Devonian) at surface, covers < 0.1 % of this area

Devonian Seboomook Formation Day Mountain member limestone

Devonian monzodiorite (Devonian) at surface, covers < 0.1 % of this area

Devonian biotite monzodiorite

Mesozoic granite (hornblende accessory mineral) (Mesozoic) at surface, covers < 0.1 % of this area

Mesozoic hornblende-biotite granite undivided

Silurian - Ordovician unnamed conglomerate (Silurian - Ordovician) at surface, covers < 0.1 % of this area

Silurian - Ordovician unnamed conglomerate

Ordovician - Precambrian Z Ellsworth formation, quartz granofels member (Ordovician - Precambrian Z) at surface, covers < 0.1 % of this area

Ordovician - Precambrian Z Ellsworth formation quartz granofels member

Cambrian Caucomgomoc Lake Formation, quartzwacke and pelite member (Cambrian) at surface, covers < 0.1 % of this area

Cambrian Caucomgomoc Lake Formation quartzwacke and pelite member

Silurian Capens Formation (Silurian) at surface, covers < 0.1 % of this area

Silurian Capens Formation

Devonian Hobbstown Formation (Devonian) at surface, covers < 0.1 % of this area

Devonian Hobbstown Formation

Devonian unnamed garnet rhyolite (Devonian) at surface, covers < 0.1 % of this area

Devonian unnamed garnet rhyolite

Silurian granite (Silurian) at surface, covers < 0.1 % of this area

Silurian granite

Silurian - Ordovician Aroostook River Formation (Silurian - Ordovician) at surface, covers < 0.1 % of this area

Silurian - Ordovician Aroostook River Formation

Silurian - Ordovician Mars Hill Conglomerate (Silurian - Ordovician) at surface, covers < 0.1 % of this area

Silurian - Ordovician Mars Hill Conglomerate

Ordovician - Precambrian Z Ellsworth formation, greenstone member (Ordovician - Precambrian Z) at surface, covers < 0.1 % of this area

Ordovician - Precambrian Z Ellsworth formation greenstone member

Carboniferous syenite (Carboniferous) at surface, covers < 0.1 % of this area

Carboniferous biotite syenite undivided

Devonian - Silurian Towow Formation, conglomerate (Devonian - Silurian) at surface, covers < 0.1 % of this area

Devonian - Silurian Towow Formation conglomerate

Devonian granodiorite - quartz monzodiorite (hornblende accessory mineral) (Devonian) at surface, covers < 0.1 % of this area

Devonian hornblende-biotite granodiorite to quartz monzodiorite - hornblende-biotite granodiorite, hornblende-biotite tonalite, hornblende-biotite quartz syenite, and hornblende-biotite quartz monzodiorite.

Ordovician Quimby Formation, graywacke member (Ordovician) at surface, covers < 0.1 % of this area

Ordovician Quimby formation graywacke member

Ordovician Kennebec Formation (Ordovician) at surface, covers < 0.1 % of this area

Ordovician Kennebec Formation

Silurian ultramafic rocks (Silurian) at surface, covers < 0.1 % of this area

Silurian ultramafic rocks

Silurian West Branch Volcanic Rocks (Silurian) at surface, covers < 0.1 % of this area

Silurian West Branch Volcanic Rocks

Devonian granodiorite (hornblende accessory mineral, porphyritic texture) (Devonian) at surface, covers < 0.1 % of this area

Porphyritic hornblende-biotite granodiorite

Devonian Seboomook Formation Day Mountain member, conglomerate (Devonian) at surface, covers < 0.1 % of this area

Devonian Seboomook Formation Day Mountain member conglomerate

Ordovician Holmes Hole Formation (Ordovician) at surface, covers < 0.1 % of this area

Ordovician Holmes Hole Formation

Ordovician Lobster Mountain volcanic complex, basalt member (Ordovician) at surface, covers < 0.1 % of this area

Ordovician Lobster Mountain volcanic complex basalt member

Devonian quartz monzodiorite - quartz diorite (pyroxene plus hornblende accessory mineral) (Devonian) at surface, covers < 0.1 % of this area

Devonian pyroxene-hornblende-biotite quartz monzodiorite to quartz diorite - pyroxene-hornblende-biotite quartz monzodiorite and pyroxene-hornblende-biotite quartz diorite.

Ordovician Chase Lake Formation, sandstone and pelite member (Ordovician) at surface, covers < 0.1 % of this area

Ordovician Chase Lake Formation sandstone and pelite member

Cambrian Jim Pond Formation, siltstone, mudstone, and pelite (Cambrian) at surface, covers < 0.1 % of this area

Cambrian Jim Pond Formation siltstone, mudstone, and pelite

Ordovician - Precambrian Z Cushing Formation, quartzite (Ordovician - Precambrian Z) at surface, covers < 0.1 % of this area

Ordovician - Precambrian Z Cushing Formation quartzite

Ordovician - Cambrian Mount Battie Formation (Ordovician - Cambrian) at surface, covers < 0.1 % of this area

Ordovician - Cambrian Mount Battie Formation

Devonian syenite, monzodiorite (porphyritic texture) (Devonian) at surface, covers < 0.1 % of this area

Devonian pyroxene-hornblende-biotite syenite and monzodiorite

Silurian unnamed conglomerate and sandstone (Silurian) at surface, covers < 0.1 % of this area

Silurian unnamed conglomerate and sandstone

Silurian - Ordovician Vassalboro Formation, volcanic rocks (Silurian - Ordovician) at surface, covers < 0.1 % of this area

Silurian - Ordovician Vassalboro Formation volcanic rocks

Ordovician Pile Mountain Argillite (Ordovician) at surface, covers < 0.1 % of this area

Ordovician Pile Mountain Argillite

Whiskey Quartzite (Devonian) at surface, covers < 0.1 % of this area

Whiskey Quartzite

Devonian - Silurian Calderwood Formation (Devonian - Silurian) at surface, covers < 0.1 % of this area

Devonian - Silurian Calderwood Formation

Devonian foid-bearing syenite (hornblende accessory mineral) (Devonian) at surface, covers < 0.1 % of this area

Hornblende-bitoite foid-bearing syenite

Devonian Seboomook Formation, unnamed conglomerate (Devonian) at surface, covers < 0.1 % of this area

Devonian Seboomook Formation unnamed conglomerate

Devonian - Silurian unnamed conglomeratic sandstone (Devonian - Silurian) at surface, covers < 0.1 % of this area

Devonian - Silurian unnamed conglomeratic sandstone

Devonian Seboomook Formation Camera Hill Greenstone (Devonian) at surface, covers < 0.1 % of this area

Devonian Seboomook Formation Camera Hill Greenstone

Jurassic granite (Jurassic) at surface, covers < 0.1 % of this area

Jurassic granite - Jurassic biotite granite undivided

Cretaceous monzodiorite (Cretaceous) at surface, covers < 0.1 % of this area

Cretaceous biotite monzodiorite

Devonian granite-quartz diorite (Devonian) at surface, covers < 0.1 % of this area

Biotite granite, biotite granodiorite, biotite tonalite, biotite quartz syenite, biotite quartz monzodiorite, and biotite quartz diorite.

Devonian Heald Mountain Rhyolite (Devonian) at surface, covers < 0.1 % of this area

Devonian Heald Mountain Rhyolite

Devonian unnamed rhyolite (Devonian) at surface, covers < 0.1 % of this area

Devonian unnamed rhyolite

Devonian - Silurian Vinalhaven Rhyolite (Devonian - Silurian) at surface, covers < 0.1 % of this area

Devonian - Silurian Vinalhaven Rhyolite

Ordovician - Cambrian Cookson Formation, lithic sandstone and pelite (Ordovician - Cambrian) at surface, covers < 0.1 % of this area

Ordovician - Cambrian Cookson Formation lithic sandstone and pelite

Ordovician - Cambrian Cookson Formation, mafic to felsic volcanic rocks (Ordovician - Cambrian) at surface, covers < 0.1 % of this area

Ordovician - Cambrian Cookson Formation mafic to felsic volcanic rocks

Megunticook Formation, Polymictic Conglomerate Member (Ordovician - Cambrian) at surface, covers < 0.1 % of this area

Megunticook Formation, Polymictic Conglomerate Member

Silurian - Ordovician Lobster Lake Formation (Silurian - Ordovician) at surface, covers < 0.1 % of this area

Silurian - Ordovician Lobster Lake Formation

Ordovician - Cambrian Cookson Formation (Ordovician - Cambrian) at surface, covers < 0.1 % of this area

Ordovician - Cambrian Cookson formation

Silurian Sangerville Formation, Anasagunticook member sulfidic pelite (Silurian) at surface, covers < 0.1 % of this area

Silurian Sangerville Formation Anasagunticook member sulfidic pelite

Cretaceous quartz diorite - gabbro/diorite/ultramafic rocks (Cretaceous) at surface, covers < 0.1 % of this area

Cretaceous biotite quartz diorite and gabbro/diorite/ultramafic rocks

Precambrian Z Rye Formation (Precambrian) at surface, covers < 0.1 % of this area

Precambrian Z Rye Formation

Mesozoic alkali feldspar syenite (Mesozoic) at surface, covers < 0.1 % of this area

Mesozoic alkali feldspar-biotite syenite

Devonian unnamed limestone conglomerate (Devonian) at surface, covers < 0.1 % of this area

Devonian unnamed limestone conglomerate

Devonian - Silurian Frost Pond Formation (Devonian - Silurian) at surface, covers < 0.1 % of this area

Devonian - Silurian Frost Pond Formation

Ordovician Dry Wall Volcanic rocks (Ordovician) at surface, covers < 0.1 % of this area

Ordovician Dry Wall Volcanic rocks

Cretaceous mafic to felsic volcanic rocks (Cretaceous) at surface, covers < 0.1 % of this area

Cretaceous mafic to felsic volcanic rocks

Cambrian unnamed mafic volcanic rocks (Cambrian) at surface, covers < 0.1 % of this area

Cambrian unnamed mafic volcanic rocks

Carboniferous alkali feldspar quartz syenite (Carboniferous) at surface, covers < 0.1 % of this area

Alkali feldspar-biotite quartz syenite

Silurian - Ordovician unnamed sedimentary rocks (Silurian - Ordovician) at surface, covers < 0.1 % of this area

Silurian - Ordovician unnamed sedimentary rocks

Devonian Parker Bog Formation (Devonian) at surface, covers < 0.1 % of this area

Devonian Parker Bog Formation

Ordovician Lobster Mountain volcanic complex, andesite member (Ordovician) at surface, covers < 0.1 % of this area

Ordovician Lobster Mountain volcanic complex andesite member

Devonian Eastport Formation, pelite member (Devonian) at surface, covers < 0.1 % of this area

Devonian Eastport Formation pelite member

Silurian Leighton Formation, pelite member (Silurian) at surface, covers < 0.1 % of this area

Silurian Leighton Formation pelite member

Devonian - Silurian Thorofare Andesite (Devonian - Silurian) at surface, covers < 0.1 % of this area

Devonian - Silurian Thorofare Andesite

Devonian Carrabassett Formation (uncertain) (Devonian) at surface, covers < 0.1 % of this area

Devonian Carrabassett Formation (uncertain)

Precambrian Z Rockport Formation (Precambrian) at surface, covers < 0.1 % of this area

Precambrian Z Rockport Formation

Devonian Tomhegan Formation Kineo Rhyolite member, garnet rhyolite (Devonian) at surface, covers < 0.1 % of this area

Devonian Tomhegan Formation Kineo Rhyolite member garnet rhyolite

Devonian Seboomook Formation, unnamed mafic greenstone (Silurian-Devonian) at surface, covers < 0.1 % of this area

Devonian Seboomook Formation unnamed mafic greenstone

Littleton Formation, undivided (Lower Devonian; Siegenian) at surface, covers < 0.1 % of this area

Gray metapelite and metawacke and subordinate metavolcanic rocks; generally, but not everywhere, conformable with underlying Fitch or Madrid Formations. Fossiliferous in western New Hampshire.

Silurian unnamed mafic volcanic rocks (Silurian) at surface, covers < 0.1 % of this area

Silurian unnamed mafic volcanic rocks

Cambrian Hurricane Mountain Formation, black and gray metaquartzite (Cambrian) at surface, covers < 0.1 % of this area

Cambrian Hurricane Mountain Formation, black and gray metaquartzite

Ordovician Quimby Formation, rhyolitic volcanic member (Ordovician) at surface, covers < 0.1 % of this area

Ordovician Quimby formation rhyolitic volcanic member

Cretaceous quartz monzodiorite (Cretaceous) at surface, covers < 0.1 % of this area

Cretaceous biotite quartz monzodiorite

Two-mica granite of the Sebago batholith and Effingham pluton of eastern New Hampshire (Mississippian - Pennsylvanian) at surface, covers < 0.1 % of this area

Two-mica granite of the Sebago batholith and Effingham pluton of eastern New Hampshire.

Cambrian Hurricane Mountain Formation, metaquartzwacke (Cambrian) at surface, covers < 0.1 % of this area

Cambrian Hurricane Mountain Formation, metaquartzwacke

Mesozoic syenite (Mesozoic) at surface, covers < 0.1 % of this area

Mesozoic biotite syenite undivided

Cambrian Hurricane Mountain Formation, metagabbro (Cambrian) at surface, covers < 0.1 % of this area

Cambrian Hurricane Mountain Formation, metagabbro

Devonian Heald Mountain Rhyolite, dark tuff member (Devonian) at surface, covers < 0.1 % of this area

Devonian Heald Mountain Rhyolite dark tuff member

Megunticook Formation, Limestone Member (Ordovician - Cambrian) at surface, covers < 0.1 % of this area

Megunticook Formation, Limestone Member

Devonian Tarratine Formation McKenny Pond Limestone (Devonian) at surface, covers < 0.1 % of this area

Devonian Tarratine Formation McKenny Pond Limestone

Lower part of Rangeley Formation (Lower Silurian (Llandoverian)) at surface, covers < 0.1 % of this area

Gray, thinly laminated (5-25 mm) metapelite with local lentils of turbidites and thin quartz conglomerates in western New Hampshire. Sparse calc-silicate pods and coticule. Probably equivalent to member B of Rangeley Formation of Maine.

Cambrian Hurricane Mountain Formation, amphibolite and greenschist (Cambrian) at surface, covers < 0.1 % of this area

Cambrian Hurricane Mountain Formation, amphibolite and greenschist

Merrimack Group, Eliot Formation (Ordovician? - Silurian?) at surface, covers < 0.1 % of this area

Gray to green phyllite, calcareous quartzite, quartz-mica schist, and well-bedded calc-silicate.

Merrimack Group, Berwick Formation (Ordovician? - Silurian?) at surface, covers < 0.1 % of this area

Purple biotite-quartz-feldspar granofels or schist and interbeds of calc-silicate granofels and minor metapelites. Stratigraphic sequence with respect to Eliot Formation uncertain

Silurian Ames Knob formation (Silurian) at surface, covers < 0.1 % of this area

Silurian Ames Knob formation

Cambrian Hurricane Mountain Formation, metapyroxenite (Cambrian) at surface, covers < 0.1 % of this area

Cambrian Hurricane Mountain Formation, metapyroxenite

Silurian - Ordovician unnamed volcanic rocks (Silurian - Ordovician) at surface, covers < 0.1 % of this area

Silurian - Ordovician unnamed volcanic rocks

Mesozoic mafic to felsic volcanic rocks (Mesozoic) at surface, covers < 0.1 % of this area

Mesozoic mafic to felsic volcanic rocks

Ordovician Bluffer Pond Formation, rhyolite member (Ordovician) at surface, covers < 0.1 % of this area

Ordovician Bluffer Pond Formation rhyolite member

Upper part of Rangeley Formation (Lower Silurian (Llandoverian)) at surface, covers < 0.1 % of this area

Rusty-weathering, pelitic schist, metasandstone, and local coarse-grained metasandstone lentils; calc-silicate pods common; minor coticule. Probably equivalent to member C of Rangeley Formation of Maine.

Ordovician granite (Ordovician) at surface, covers < 0.1 % of this area

Ordovician biotite granite undivided

Devonian Beck Pond Limestone (Devonian) at surface, covers < 0.1 % of this area

Devonian Beck Pond Limestone

Cambrian Hurricane Mountain Formation, metafelsite (Cambrian) at surface, covers < 0.1 % of this area

Cambrian Hurricane Mountain Formation, metafelsite

Mesozoic gabbro/diorite/ultramafic rocks (Mesozoic) at surface, covers < 0.1 % of this area

Mesozoic gabbro/diorite/ultramafic rocks

Devonian syenite (pyroxene plus hornblende accessory mineral) (Devonian) at surface, covers < 0.1 % of this area

Devonian pyroxene-hornblende-biotite syenite undivided

Biotite granite (Late Ordovician) at surface, covers < 0.1 % of this area

Pink, moderately to weakly foliated.

Devonian unnamed mafic volcanic rocks (Devonian) at surface, covers < 0.1 % of this area

Devonian unnamed mafic volcanic rocks

Perry Mountain Formation, undivided (Lower? - Middle? Silurian) at surface, covers < 0.1 % of this area

Sharply interbedded quartzites, light-gray nongraphitic metapelite, and "fast-graded" meta-turbidites. Coticule layers common.

Madrid and Smalls Falls Formations, undivided (Silurian) at surface, covers < 0.1 % of this area

Madrid and Smalls Falls Formations, undivided.

Migmatitic rocks (Devonian - Silurian) at surface, covers < 0.1 % of this area

Formations unidentifiable owing to obliteration of original sedimentary or volcanic characteristics by anatexis or by numerous intrusions.

Devonian unnamed conglomerate (Devonian) at surface, covers < 0.1 % of this area

Devonian unnamed conglomerate

Silurian Oak Bay formation (Silurian) at surface, covers < 0.1 % of this area

Silurian Oak Bay formation

Silurian - Precambrian Z ultramafic rocks (Silurian - Precambrian Z) at surface, covers < 0.1 % of this area

Silurian - Precambrian Z ultramafic rocks

Member C (uppermost) of the Rangeley Formation in Maine and northeastern and southwestern New Hampshire (Lower Silurian (Llandoverian)) at surface, covers < 0.1 % of this area

Quartz-pebble conglomerate overlain by rusty metapelite and feldspathic quartzite.

Biotite quartz diorite in northeastern New Hampshire (Early - Late Devonian) at surface, covers < 0.1 % of this area

Biotite quartz diorite in northeastern New Hampshire

Madrid Formation (Upper Silurian?) at surface, covers < 0.1 % of this area

Massive to weakly foliated, purple biotite-feldspar granofels, layered calc-silicate, and dark pelitic-sulfidic schist containing calc-silicate pods in upper member; an eastern facies equivalent to the upper part of the Fitch Formation. Locally mapped as the Warner Formation of Nielson (1981) in southern New Hampshire.

Cretaceous intrusive breccia (Cretaceous) at surface, covers < 0.1 % of this area

Cretaceous intrusive breccia

Merrimack Group, Kittery Formation (Ordovician? - Silurian?) at surface, covers < 0.1 % of this area

Tan, graded-bedded, calcareous metasandstone and purple and green phyllite. Grades into the Eliot formation but facing direction is uncertain.

Rangeley Formation, undivided (Lower Silurian (Llandoverian)) at surface, covers < 0.1 % of this area

Rangeley Formation, undivided.

Ammonoosuc Volcanics, Volcaniclastic metagraywackes (Middle - Upper Ordovician) at surface, covers < 0.1 % of this area

Ammonoosuc Volcanics, Volcaniclastic metagraywackes.

Smalls Falls Formation, undivided (Upper to Middle Silurian (Ludlovian and Wenlockian)) at surface, covers < 0.1 % of this area

Very rusty weathering, thinly bedded sulfidic-graphitic schist and pyrrhotitic calc-silicate granofels. Eastern facies equivalent to lower part of the Fitch Formation. Locally mapped as Francestown Formation of Nielson (1981) in southern New Hampshire.

Two-mica granite of northern and southeastern New Hampshire (Early - Late Devonian) at surface, covers < 0.1 % of this area

Similar to Concord Granite.

Ammonoosuc Volcanics, Bimodal volcanic rocks (Middle - Upper Ordovician) at surface, covers < 0.1 % of this area

Ammonoosuc Volcanics, Bimodal volcanic rocks - Locally includes unmapped Oals.

Ammonoosuc Volcanics, Metabasalt (Middle - Upper Ordovician) at surface, covers < 0.1 % of this area

Ammonoosuc Volcanics, Metabasalt.

Dead River Formation, undivided (Upper Cambrian? - Lower Ordovician?) at surface, covers < 0.1 % of this area

Thinly laminated, "pin-striped" gray, green, or tan metapelite and quartzite.

Concord Granite (Late Devonian) at surface, covers < 0.1 % of this area

Gray two-mica granite, locally grading to tonalite.