Geologic units in Penobscot county, Maine

Silurian - Ordovician Vassalboro Formation (Silurian - Ordovician) at surface, covers 26 % of this area

Silurian - Ordovician Vassalboro formation

Silurian undifferentiated pelites and sandstones (Silurian) at surface, covers 14 % of this area

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

Devonian - Silurian Madrid Formation (Devonian - Silurian) at surface, covers 13 % of this area

Devonian - Silurian Madrid Formation

Silurian Waterville Formation (Silurian) at surface, covers 6 % of this area

Silurian Waterville Formation

Devonian quartz monzonite (hornblende accessory mineral) (Devonian) at surface, covers 4 % of this area

Hornblende-biotite quartz monzonite

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

Devonian Carrabassett Formation

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

Devonian Seboomook Formation

Silurian unnamed limestone (Silurian) at surface, covers 3 % of this area

Silurian unnamed limestone

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

Biotite granite

Cambrian Grand Pitch Formation (Cambrian) at surface, covers 3 % of this area

Cambrian Grand Pitch Formation

Devonian - Ordovician Bucksport Formation (Devonian - Ordovician) at surface, covers 2 % of this area

Devonian - Ordovician Bucksport Formation

Devonian - Silurian undifferentiated sedimentary rocks of the Spider Lake, Chandler Pond and Third Lake Formations (Devonian - Silurian) at surface, covers 2 % of this area

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

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

Ordovician unnamed volcanic rocks

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

Devonian granite

Devonian granite-quartz monzonite (hornblende accessory mineral) (Devonian) at surface, covers 2 % 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 - Cambrian unnamed sedimentary rocks (Ordovician - Cambrian) at surface, covers 2 % of this area

Ordovician - Cambrian unnamed sedimentary rocks

Devonian granodiorite (hornblende accessory mineral) (Devonian) at surface, covers 1 % of this area

Hornblende-biotite granodiorite

Silurian undifferentiated sandstones (Silurian) at surface, covers 1.0 % of this area

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

Silurian unnamed sandstone (Silurian) at surface, covers 0.8 % of this area

Silurian unnamed sandstone

Devonian Matagamon Sandstone (Devonian) at surface, covers 0.7 % of this area

Devonian Matagamon Sandstone

Ordovician quartz diorite (hornblende accessory mineral) (Ordovician) at surface, covers 0.6 % of this area

Ordovician quartz diorite (hornblende accessory mineral)

Ordovician - Precambrian Z metasedimentary and metavolcanic rocks of the Passagassawakeag block (Ordovician - Precambrian Z) at surface, covers 0.6 % of this area

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

Devonian granodiorite - quartz diorite (Devonian) at surface, covers 0.6 % 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 Wassataquoik Chert (Ordovician) at surface, covers 0.5 % of this area

Ordovician Wassataquoik Chert

Ordovician Belle Lake Slate (Ordovician) at surface, covers 0.5 % of this area

Ordovician Belle Lake Slate

Devonian granite (intrusive breccia texture) (Devonian) at surface, covers 0.5 % of this area

Devonian granite (intrusive breccia texture)

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

Silurian unnamed conglomerate

Silurian Waterville Formation, limestone member (Silurian) at surface, covers 0.4 % of this area

Silurian Waterville Formation limestone member

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

Ordovician unnamed felsic volcanic rocks

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

Silurian Sangerville Formation

Silurian unnamed sedimentary rocks (Silurian) at surface, covers 0.3 % of this area

Silurian unnamed sedimentary rocks

Ordovician Shin Brook Formation (Ordovician) at surface, covers 0.3 % of this area

Ordovician Shin Brook Formation

Cambrian Jim Pond Formation, mafic volcanic rocks (Cambrian) at surface, covers 0.3 % of this area

Cambrian Jim Pond Formation mafic volcanic rocks

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

Devonian Swanback Formation

Undifferentiated volcanic rocks of the Spider Lake and Chandler Pond Formations (Devonian - Silurian) at surface, covers 0.2 % of this area

Undifferentiated volcanic rocks of the Spider Lake and Chandler Pond Formations

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

Silurian Smalls Falls Formation

Ordovician gabbro/diorite/ultramafic rocks (Ordovician) at surface, covers 0.2 % of this area

Ordovician gabbro/diorite/ultramafic rocks

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

Ordovician unnamed pelite

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

Ordovician unnamed sulfidic pelite

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

Silurian Perry Mountain formation

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

Biotite granite undivided

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

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

Devonian hornblende-biotite quartz diorite

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

Carboniferous - Devonian unnamed conglomerate and sandstone

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

Silurian - Ordovician unnamed conglomerate

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

Devonian Traveler Rhyolite Pogy member

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

Ordovician - Precambrian Z Cape Elizabeth Formation

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

Silurian unnamed conglomerate and sandstone

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

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

Devonian - Silurian unnamed sedimentary rocks

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

Devonian biotite monzodiorite

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

Silurian unnamed volcanic and sedimentary rocks

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

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

Silurian Sangerville Formation limestone member

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

Silurian - Ordovician Mattawamkeag Formation

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

Devonian - Ordovician unnamed pelite

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

Silurian Sangerville Formation Patch Mountain member

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

Silurian - Ordovician unnamed volcanic rocks