Geologic units in Washington county, Maine

Devonian - Ordovician Flume Ridge Formation (Devonian - Ordovician) at surface, covers 17 % of this area

Devonian - Ordovician Flume Ridge Formation

Devonian gabbro/diorite/ultramafic rocks - quartz diorite (Devonian) at surface, covers 11 % of this area

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

Devonian granite (Devonian) at surface, covers 9 % of this area

Devonian granite

Devonian alkali feldspar granite (Devonian) at surface, covers 9 % of this area

Alkali feldspar-biotite granite

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

Biotite granite

Ordovician - Cambrian unnamed sedimentary rocks (Ordovician - Cambrian) at surface, covers 6 % of this area

Ordovician - Cambrian unnamed sedimentary rocks

Silurian Dennys Formation, mafic to felsic volcanic rock member (Silurian) at surface, covers 3 % of this area

Silurian Dennys Formation mafic to felsic volcanic rock member

Devonian granite (hornblende accessory mineral) (Devonian) at surface, covers 3 % of this area

Hornblende-biotite granite

Devonian - Ordovician Dideguash Formation (Devonian - Ordovician) at surface, covers 3 % of this area

Devonian - Ordovician Dideguash Formation

Ordovician - Precambrian Z Columbia Falls Formation (Ordovician - Precambrian Z) at surface, covers 3 % of this area

Ordovician - Precambrian Z Columbia Falls Formation

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

Silurian Edmunds formation

Silurian Quoddy Formation, mafic to felsic volcanic rock member (Silurian) at surface, covers 2 % of this area

Silurian Quoddy Formation mafic to felsic volcanic rock member

Ordovician - Cambrian Cookson Formation, sulfidic quartzose sandstone (Ordovician - Cambrian) at surface, covers 2 % of this area

Ordovician - Cambrian Cookson Formation sulfidic quartzose sandstone

Devonian gabbro/diorite/ultramafic rocks (Devonian) at surface, covers 2 % of this area

Devonian gabbro/diorite/ultramafic rocks

Ordovician - Cambrian Cookson Formation, sulfidic pelite (Ordovician - Cambrian) at surface, covers 2 % of this area

Ordovician - Cambrian Cookson Formation sulfidic pelite

Devonian Eastport Formation, mafic to felsic volcanic member (Devonian) at surface, covers 2 % of this area

Devonian Eastport Formation mafic to felsic volcanic member

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

Ordovician unnamed pelite

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

Penobscot Formation

Unnamed volcanic rocks (Devonian - Silurian) at surface, covers 2 % of this area

Unnamed volcanic rocks

Silurian gabbro/diorite/ultramafic rocks (Silurian) at surface, covers 2 % of this area

Silurian gabbro/diorite/ultramafic rocks

Ordovician unnamed felsic volcanic rocks (Ordovician) at surface, covers 1 % of this area

Ordovician unnamed felsic volcanic rocks

Silurian Quoddy Formation, pelite member (Silurian) at surface, covers 1 % of this area

Silurian Quoddy formation pelite member

Silurian Leighton Formation, mafic to felsic volcanic rock member (Silurian) at surface, covers 1.0 % of this area

Silurian Leighton Formation mafic to felsic volcanic rock member

Devonian granite (porphyritic texture) (Devonian) at surface, covers 0.7 % of this area

Biotite granite undivided

Silurian unnamed sandstone (Silurian) at surface, covers 0.6 % of this area

Silurian unnamed sandstone

Silurian - Ordovician Vassalboro Formation (Silurian - Ordovician) at surface, covers 0.6 % of this area

Silurian - Ordovician Vassalboro formation

Devonian Perry Formation, sandstone member (Devonian) at surface, covers 0.6 % of this area

Devonian Perry Formation sandstone member

Silurian Quoddy Formation, undifferentiated volcanic rock member (Silurian) at surface, covers 0.6 % of this area

Silurian Quoddy Formation undifferentiated volcanic rock member

Devonian Eastport Formation, basalt member (Devonian) at surface, covers 0.5 % of this area

Devonian Eastport Formation basalt member

Devonian - Ordovician Bucksport Formation (Devonian - Ordovician) at surface, covers 0.5 % of this area

Devonian - Ordovician Bucksport Formation

Silurian Dennys Formation, basalt member (Silurian) at surface, covers 0.4 % of this area

Silurian Dennys formation basalt member

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

Silurian Hersey formation

Ordovician Belle Lake Slate (Ordovician) at surface, covers 0.4 % of this area

Ordovician Belle Lake Slate

Devonian granite-quartz monzonite (hornblende accessory mineral) (Devonian) at surface, covers 0.4 % 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.

Ordovician unnamed sulfidic pelite (Ordovician) at surface, covers 0.3 % of this area

Ordovician unnamed sulfidic pelite

Devonian - Silurian unnamed conglomerate (Devonian - Silurian) at surface, covers 0.3 % of this area

Devonian - Silurian unnamed conglomerate

Devonian - Silurian Daggett Ridge Formation (Devonian - Silurian) at surface, covers 0.3 % of this area

Devonian - Silurian Daggett Ridge Formation

Silurian Leighton Formation, basalt member (Silurian) at surface, covers 0.2 % of this area

Silurian Leighton Formation basalt member

Devonian Perry Formation, basalt member (Devonian) at surface, covers 0.2 % of this area

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

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

Hornblende-biotite granite undivided

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

Ordovician unnamed mafic volcanic rocks

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

Devonian Hartin Formation

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

Hornblende-biotite quartz monzonite

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

Pyroxene-hornblende-biotite granite undivided

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

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

Carboniferous - Devonian unnamed conglomerate and sandstone

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

Devonian biotite syenite undivided

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

Ordovician - Cambrian Cookson formation

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

Devonian unnamed limestone conglomerate

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

Silurian Oak Bay formation