Geologic units in Kennebec county, Maine

Silurian - Ordovician Vassalboro Formation (Silurian - Ordovician) at surface, covers 28 % of this area

Silurian - Ordovician Vassalboro formation

Silurian Sangerville Formation (Silurian) at surface, covers 18 % of this area

Silurian Sangerville Formation

Silurian Waterville Formation (Silurian) at surface, covers 16 % of this area

Silurian Waterville Formation

Devonian granite (Devonian) at surface, covers 8 % of this area

Devonian granite

Ordovician - Precambrian Z Cushing Formation (Ordovician - Precambrian Z) at surface, covers 6 % of this area

Ordovician - Precambrian Z Cushing Formation

Silurian Sangerville Formation, Patch Mountain member (Silurian) at surface, covers 4 % of this area

Silurian Sangerville Formation Patch Mountain member

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

Silurian Sangerville Formation limestone member

Silurian Unnamed sulfidic pelite (Silurian) at surface, covers 3 % of this area

Silurian Unnamed sulfidic pelite

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

Silurian Waterville Formation limestone member

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

Muscovite-biotite granite undivided

Devonian quartz monzonite (muscovite accessory mineral) (Devonian) at surface, covers 2 % of this area

Muscovite-biotite quartz monzonite

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

Biotite granodiorite

Silurian Perry Mountain Formation (Silurian) at surface, covers 0.8 % of this area

Silurian Perry Mountain formation

Silurian - Ordovician unnamed pelite (Silurian - Ordovician) at surface, covers 0.7 % of this area

Silurian - Ordovician unnamed pelite

Silurian - Ordovician unnamed sulfidic pelite (Silurian - Ordovician) at surface, covers 0.7 % of this area

Silurian - Ordovician unnamed sulfidic pelite

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

Carboniferous gabbro/diorite/ultramafic rocks undivided

Devonian - Silurian Madrid Formation (Devonian - Silurian) at surface, covers 0.4 % of this area

Devonian - Silurian Madrid Formation

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

Silurian Smalls Falls Formation

Ordovician - Precambrian Z Cushing Formation, sulfidic pelite (Ordovician - Precambrian Z) at surface, covers 0.3 % of this area

Ordovician - Precambrian Z Cushing Formation sulfidic pelite

Devonian foid-bearing syenite (hornblende accessory mineral) (Devonian) at surface, covers 0.2 % of this area

Hornblende-bitoite foid-bearing syenite

Carboniferous syenite (Carboniferous) at surface, covers 0.2 % of this area

Carboniferous biotite syenite undivided

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

Alkali feldspar-biotite quartz syenite

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

Ordovician - Precambrian Z Cape Elizabeth Formation

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

Ordovician - Precambrian Z Cushing Formation quartzite

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

Devonian gabbro/diorite/ultramafic rocks

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

Silurian Sangerville Formation sulfidic pelite member

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