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

Geologic units in Waldo county, Maine

[Additional scientific data in this geographic area]

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

Silurian ultramafic rocks

Lithology: ultramafic intrusive rock

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

Megunticook Formation, Polymictic Conglomerate Member

Lithology: conglomerate

Ordovician - Precambrian Z Ellsworth formation (Ordovician - Precambrian Z) at surface, covers 0.1 % of this area

Ordovician - Precambrian Z Ellsworth formation

Lithology: phyllite; siltstone

Precambrian Z Coombs Limestone (Precambrian Z) at surface, covers 0.2 % of this area

Precambrian Z Coombs Limestone

Lithology: marble; granulite

Ordovician - Precambrian Z Cushing Formation quartzite (Ordovician - Precambrian Z) at surface, covers 0.2 % of this area

Ordovician - Precambrian Z Cushing Formation quartzite

Lithology: quartzite

Silurian Waterville Formation (Silurian) at surface, covers 1.0 % of this area

Silurian Waterville Formation

Lithology: slate; schist; graywacke; calc-silicate rock; black shale

Devonian granite (muscovite accessory mineral) (Devonian) at surface, covers 0.3 % of this area

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

Lithology: granite

Penobscot Formation (Ordovician - Cambrian) at surface, covers 13 % of this area

Penobscot Formation

Lithology: slate; schist; quartztite

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

Silurian - Ordovician unnamed pelite

Lithology: mudstone

Penobscot Formation, Basalt Member (Ordovician - Cambrian) at surface, covers 0.5 % of this area

Penobscot Formation, Basalt Member

Lithology: basalt

Precambrian Z North Haven Formation (Precambrian) at surface, covers < 0.1 % of this area

Precambrian Z North Haven Formation

Lithology: greenstone; volcanic rock; mudstone

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

Megunticook Formation, Limestone Member

Lithology: limestone

Precambrian Z rocks of Islesboro limestone (Precambrian) at surface, covers 0.2 % of this area

Precambrian Z rocks of Islesboro limestone

Lithology: limestone; dolostone (dolomite)

Ordovician - Cambrian Megunticook Formation (Ordovician - Cambrian) at surface, covers 0.9 % of this area

Ordovician - Cambrian Megunticook Formation

Lithology: schist; granulite; quartzite

Ordovician - Precambrian Z Cape Elizabeth Formation mafic to felsic volcanic member (Ordovician - Precambrian Z) at surface, covers 0.9 % of this area

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

Lithology: mafic metavolcanic rock; felsic metavolcanic rock

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

Silurian - Ordovician unnamed sulfidic pelite

Lithology: mudstone

Ordovician - Precambrian Z Cushing Formation (Ordovician - Precambrian Z) at surface, covers 7 % of this area

Ordovician - Precambrian Z Cushing Formation

Lithology: mafic metavolcanic rock; felsic metavolcanic rock

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

Silurian - Ordovician Vassalboro formation

Lithology: sandstone; quartzite; schist; limestone

Devonian - Precambrian Z Appleton Ridge Formation (Devonian - Precambrian Z) at surface, covers 3 % of this area

Devonian - Precambrian Z Appleton Ridge Formation

Lithology: schist; phyllite

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

Devonian syenite - Devonian biotite syenite undivided

Lithology: syenite

Precambrian Z Ogier Point Formation (Precambrian) at surface, covers 0.3 % of this area

Precambrian Z Ogier Point Formation

Lithology: mudstone; sandstone

Ordovician - Precambrian Z metasedimentary and metavolcanic rocks of the Passagassawakeag block (Ordovician - Precambrian Z) at surface, covers 8 % 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 0.7 % of this area

Ordovician - Precambrian Z Cape Elizabeth Formation quartzite member

Lithology: quartzite

Ordovician - Precambrian Z Cushing Formation sulfidic pelite (Ordovician - Precambrian Z) at surface, covers 0.7 % of this area

Ordovician - Precambrian Z Cushing Formation sulfidic pelite

Lithology: mudstone; sandstone

Ordovician - Precambrian Z Cushing Formation mafic volcanic member (Ordovician - Precambrian Z) at surface, covers 1 % of this area

Ordovician - Precambrian Z Cushing Formation mafic volcanic member

Lithology: mafic volcanic rock

Precambrian Z rocks of Islesboro (Precambrian Z) at surface, covers 1 % of this area

Precambrian Z rocks of Islesboro

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

Ordovician - Precambrian Z Cape Elizabeth Formation (Ordovician - Precambrian Z) at surface, covers 14 % of this area

Ordovician - Precambrian Z Cape Elizabeth Formation

Lithology: slate; schist; quartzite; phyllite

Ordovician - Precambrian Z calc-silicate rocks of the Passagassawakeag block (Ordovician - Precambrian Z) at surface, covers 0.3 % of this area

Ordovician - Precambrian Z calc-silicate rocks of the Passagassawakeag block

Lithology: 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 Cushing Formation limestone (Ordovician - Precambrian Z) at surface, covers 0.1 % of this area

Ordovician - Precambrian Z Cushing Formation limestone

Lithology: limestone

Devonian - Ordovician Bucksport Formation (Devonian - Ordovician) at surface, covers 8 % of this area

Devonian - Ordovician Bucksport Formation

Lithology: sandstone; limestone; calc-silicate rock

Devonian granite (Devonian) at surface, covers 12 % of this area

Devonian granite

Lithology: granite