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Mineral Resources > Online Spatial Data > Geology > by state > Maine Geology

Geologic units in Knox county, Maine

[Additional scientific data in this geographic area]

Precambrian Z Coombs Limestone (Precambrian Z) at surface, covers 0.9 % of this area

Precambrian Z Coombs Limestone

Lithology: marble; granulite

Ordovician - Precambrian Z Ellsworth formation (Ordovician - Precambrian Z) at surface, covers 0.4 % of this area

Ordovician - Precambrian Z Ellsworth formation

Lithology: phyllite; siltstone

Megunticook Formation, Polymictic Conglomerate Member (Ordovician - Cambrian) at surface, covers 0.2 % of this area

Megunticook Formation, Polymictic Conglomerate Member

Lithology: conglomerate

Ordovician - Cambrian Mount Battie Formation (Ordovician - Cambrian) at surface, covers 0.6 % of this area

Ordovician - Cambrian Mount Battie Formation

Lithology: conglomerate

Devonian - Silurian Calderwood Formation (Devonian - Silurian) at surface, covers 0.5 % of this area

Devonian - Silurian Calderwood Formation

Lithology: mudstone; sandstone

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

Silurian Ames Knob formation

Lithology: limestone; shale; conglomerate

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

Silurian ultramafic rocks

Lithology: ultramafic intrusive rock

Ordovician unnamed quartz sandstone and pelite (Ordovician) at surface, covers 4 % of this area

Ordovician unnamed quartz sandstone and pelite

Lithology: mudstone; sandstone

Ordovician Benner Hill Formation sulfidic pelite (Ordovician) at surface, covers 2 % of this area

Ordovician Benner Hill Formation sulfidic pelite

Lithology: mudstone

Ordovician unnamed sandstone and pelite (Ordovician) at surface, covers 1 % of this area

Ordovician unnamed sandstone and pelite

Lithology: mudstone; sandstone

Ordovician Benner Hill formation (Ordovician) at surface, covers 4 % of this area

Ordovician Benner Hill formation

Lithology: gneiss; sandstone; mudstone

Ordovician - Cambrian Megunticook Formation (Ordovician - Cambrian) at surface, covers 11 % of this area

Ordovician - Cambrian Megunticook Formation

Lithology: schist; granulite; quartzite

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

Ordovician unnamed mafic volcanic rocks

Lithology: mafic volcanic rock

Precambrian Z rocks of Islesboro limestone (Precambrian) at surface, covers 0.6 % of this area

Precambrian Z rocks of Islesboro limestone

Lithology: limestone; dolostone (dolomite)

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

Megunticook Formation, Limestone Member

Lithology: limestone

Penobscot Formation, Basalt Member (Ordovician - Cambrian) at surface, covers 0.4 % of this area

Penobscot Formation, Basalt Member

Lithology: basalt

Precambrian Z North Haven Formation (Precambrian) at surface, covers 3 % of this area

Precambrian Z North Haven Formation

Lithology: greenstone; volcanic rock; mudstone

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

Devonian granite (muscovite accessory mineral) - muscovite-biotite granite undivided

Lithology: granite

Penobscot Formation (Ordovician - Cambrian) at surface, covers 15 % of this area

Penobscot Formation

Lithology: slate; schist; quartztite

Devonian - Silurian Castine Formation (Devonian - Silurian) at surface, covers 0.6 % of this area

Devonian - Silurian Castine Formation

Lithology: mafic volcanic rock; felsic volcanic rock

Ordovician - Precambrian Z metasedimentary and metavolcanic rocks of the Passagassawakeag block (Ordovician - Precambrian Z) at surface, covers 2 % of this area

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

Lithology: metasedimentary rock; metavolcanic rock

Ordovician - Precambrian Z Cape Elizabeth Formation quartzite member (Ordovician - Precambrian Z) at surface, covers 0.3 % of this area

Ordovician - Precambrian Z Cape Elizabeth Formation quartzite member

Lithology: quartzite

Precambrian Z Ogier Point Formation (Precambrian) at surface, covers 2 % of this area

Precambrian Z Ogier Point Formation

Lithology: mudstone; sandstone

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

Devonian syenite - Devonian biotite syenite undivided

Lithology: syenite

Devonian - Precambrian Z Appleton Ridge Formation (Devonian - Precambrian Z) at surface, covers 8 % of this area

Devonian - Precambrian Z Appleton Ridge Formation

Lithology: schist; phyllite

Ordovician - Precambrian Z Cape Elizabeth Formation mafic to felsic volcanic member (Ordovician - Precambrian Z) at surface, covers 0.5 % of this area

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

Lithology: mafic metavolcanic rock; felsic metavolcanic rock

Devonian - Silurian Thorofare Andesite (Devonian - Silurian) at surface, covers 0.2 % of this area

Devonian - Silurian Thorofare Andesite

Lithology: andesite

Devonian granite (Devonian) at surface, covers 15 % of this area

Devonian granite

Lithology: granite

Devonian - Ordovician Bucksport Formation (Devonian - Ordovician) at surface, covers 7 % of this area

Devonian - Ordovician Bucksport Formation

Lithology: sandstone; limestone; calc-silicate rock

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

Precambrian Z Rockport Formation

Lithology: conglomerate

Ordovician - Precambrian Z Cape Elizabeth Formation (Ordovician - Precambrian Z) at surface, covers 2 % of this area

Ordovician - Precambrian Z Cape Elizabeth Formation

Lithology: slate; schist; quartzite; phyllite

Devonian - Silurian Vinalhaven Rhyolite (Devonian - Silurian) at surface, covers 0.4 % of this area

Devonian - Silurian Vinalhaven Rhyolite

Lithology: rhyolite

Ordovician unnamed sandstone (Ordovician) at surface, covers 7 % of this area

Ordovician unnamed sandstone

Lithology: sandstone; limestone

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

Devonian gabbro/diorite/ultramafic rocks

Lithology: gabbro; diorite; ultramafic intrusive rock

Precambrian Z rocks of Islesboro (Precambrian Z) at surface, covers 0.7 % of this area

Precambrian Z rocks of Islesboro

Lithology: mudstone; sandstone; siltstone, limestone; dolostone (dolomite); conglomerate; rhyolite; basalt