Geologic units in Oxford county, Maine

Additional scientific data in this geographic area

Carboniferous alkali feldspar granite (muscovite accessory mineral) (Carboniferous) at surface, covers 17 % of this area

Muscovite-biotite granite

Silurian Sangerville Formation, Anasagunticook member (Silurian) at surface, covers 7 % of this area

Silurian Sangerville Formation Anasagunticook member

Devonian tonalite (Devonian) at surface, covers 7 % of this area

Biotite tonalite

Devonian granite (muscovite accessory mineral) (Devonian) at surface, covers 6 % of this area

Muscovite-biotite granite

Devonian Littleton Formation (Devonian) at surface, covers 5 % of this area

Devonian Littleton Formation

Ordovician - Cambrian Dead River Formation, lower member (Ordovician - Cambrian) at surface, covers 4 % of this area

Ordovician - Cambrian Dead River formation lower member

Devonian granite (muscovite accessory mineral), tonalite (Devonian) at surface, covers 4 % of this area

Devonian granite (muscovite accessory mineral), tonalite

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

Devonian Carrabassett Formation

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

Silurian Smalls Falls Formation

Devonian granodiorite (Devonian) at surface, covers 3 % of this area

Biotite granodiorite

Devonian quartz monzodiorite - quartz diorite (pyroxene plus hornblende accessory mineral) (Devonian) at surface, covers 3 % of this area

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

Silurian Sangerville Formation, Patch Mountain member (Silurian) at surface, covers 2 % of this area

Silurian Sangerville Formation Patch Mountain member

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

Silurian Rangeley formation

Cambrian Hurricane Mountain Formation (Cambrian) at surface, covers 2 % of this area

Cambrian Hurricane Mountain Formation

Devonian - Silurian Madrid Formation (Devonian - Silurian) at surface, covers 2 % of this area

Devonian - Silurian Madrid Formation

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

Silurian Perry Mountain formation

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

Muscovite-biotite granite

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

Ordovician biotite granite

Ordovician - Cambrian Aziscohos Formation (Ordovician - Cambrian) at surface, covers 2 % of this area

Ordovician - Cambrian Aziscohos Formation

Devonian - Silurian Rindgemere Formation lower member (Devonian - Silurian) at surface, covers 2 % of this area

Devonian - Silurian Rindgemere Formation lower member

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

Devonian granite

Cambrian Jim Pond Formation, graywacke (Cambrian) at surface, covers 1 % of this area

Cambrian Jim Pond Formation graywacke

Ordovician - Cambrian Dead River Formation (Ordovician - Cambrian) at surface, covers 1 % of this area

Ordovician - Cambrian Dead River formation

Devonian Seboomook Formation (Devonian) at surface, covers 1 % of this area

Devonian Seboomook Formation

Devonian Seboomook Formation Day Mountain member (Devonian) at surface, covers 1 % of this area

Devonian Seboomook Formation Day Mountain member

Ordovician Ammonoosuc Volcanics (Ordovician) at surface, covers 1 % of this area

Ordovician Ammonoosuc Volcanics

Devonian Seboomook Formation Temple Stream member (Silurian-Devonian) at surface, covers 1 % of this area

Devonian Seboomook Formation Temple Stream member

Devonian Hildreths Formation (Devonian) at surface, covers 0.9 % of this area

Devonian Hildreths Formation

Silurian Sangerville Formation (Silurian) at surface, covers 0.9 % of this area

Silurian Sangerville Formation

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

Muscovite-biotite granodiorite

Silurian Sangerville Formation, Anasagunticook member limestone (Silurian) at surface, covers 0.8 % of this area

Silurian Sangerville Formation Anasagunticook member limestone

Devonian Seboomook Formation Mount Blue member (Devonian) at surface, covers 0.8 % of this area

Devonian Seboomook Formation Mount Blue member

Devonian Ironbound Mountain Formation (Devonian) at surface, covers 0.7 % of this area

Devonian Ironbound Mountain Formation

Devonian - Cambrian unnamed sedimentary rocks (Devonian-Cambrian) at surface, covers 0.5 % of this area

Devonian - Cambrian unnamed sedimentary rocks

Ordovician - Cambrian Dead River Formation, upper member (Ordovician - Cambrian) at surface, covers 0.4 % of this area

Ordovician - Cambrian Dead River formation upper member

Ordovician unnamed volcanic and sedimentary rocks (Ordovician) at surface, covers 0.4 % of this area

Ordovician unnamed volcanic and sedimentary rocks

Silurian Smalls Falls Formation? (Silurian) at surface, covers 0.4 % of this area

Silurian Smalls Falls Formation?

Ordovician unnamed mafic volcanic rocks (Ordovician) at surface, covers 0.4 % of this area

Ordovician unnamed mafic volcanic rocks

Devonian - Silurian undifferentiated sedimentary rocks in areas of extreme migmatization (Devonian - Silurian) at surface, covers 0.4 % of this area

Devonian - Silurian undifferentiated sedimentary rocks in areas of extreme migmatization

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

Silurian Rangeley Formation ""C"" member

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

Ordovician biotite granite and granodiorite

Devonian - Silurian Rindgemere Formation lower member, sulfidic pelite (Devonian - Silurian) at surface, covers 0.3 % of this area

Devonian - Silurian Rindgemere Formation lower member sulfidic pelite

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

Ordovician Quimby formation

Mesozoic foid-bearing syenite (Mesozoic) at surface, covers 0.2 % of this area

Mesozoic biotite foid-bearing syenite

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

Ordovician - Cambrian unnamed volcanic rocks

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

Biotite granite

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

Silurian Rangeley Formation ""A"" member lithic sandstone

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

Silurian Rangeley Formation ""B"" member""

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

Silurian granite

Silurian unnamed limestone (Silurian) at surface, covers 0.1 % of this area

Silurian unnamed limestone

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

Ordovician Kamankeag Formation pelite member

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

Cretaceous alkali feldspar-biotite quartz syenite

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

Ordovician Kamankeag Formation basalt and graywacke member

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

Jurassic granite - Jurassic biotite granite undivided

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

Devonian gabbro/diorite/ultramafic rocks

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

Silurian Rangeley Formation ""A"" member

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

Silurian Greenvale Cove Formation

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

Muscovite-biotite granite undivided

Devonian gabbro - ultramafic rocks (Devonian) at surface, covers < 0.1 % of this area

Devonian gabbro - ultramafic rocks

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

Silurian Sangerville Formation Anasagunticook member sulfidic pelite

Precambrian gneisses of the Chain Lakes Massif (Precambrian) at surface, covers < 0.1 % of this area

Precambrian gneisses of the Chain Lakes Massif

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

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

Cretaceous alkali feldspar-biotite syenite

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

Cambrian Jim Pond Formation mafic volcanic rocks

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

Devonian Carrabassett Formation (uncertain)

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.

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

Ordovician gabbro/diorite/ultramafic rocks

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

Cambrian ultramafic rocks

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

Mesozoic alkali feldspar-biotite syenite

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

Silurian - Ordovician Frontenac Formation

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

Pink, moderately to weakly foliated.

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.

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.

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.

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

Mesozoic mafic to felsic 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.

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.

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.

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

Cambrian gabbro/diorite/ultramafic rocks

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.