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

Geologic units in Hancock county, Maine

[Additional scientific data in this geographic area]

Devonian - Ordovician Flume Ridge Formation (Devonian - Ordovician) at surface, covers 0.6 % of this area

Devonian - Ordovician Flume Ridge Formation

Lithology: graywacke; siltstone; slate

Devonian granite (intrusive breccia texture) (Devonian) at surface, covers 0.6 % of this area

Devonian granite (intrusive breccia texture)

Lithology: granite

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

Devonian granite-quartz monzonite (hornblende accessory mineral) 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.

Lithology: granite; granodiorite; tonalite; quartz syenite; quartz monzonite

Devonian granite (muscovite accessory mineral) (Devonian) at surface, covers 4 % of this area

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

Lithology: granite

Devonian alkali feldspar granite (Devonian) at surface, covers 16 % of this area

Devonian alkali feldspar granite; alkali feldspar-biotite granite

Lithology: granite

Penobscot Formation (Ordovician - Cambrian) at surface, covers 4 % of this area

Penobscot Formation

Lithology: slate; schist; quartztite

Devonian granite (pyroxene plus hornblende accessory mineral) (Devonian) at surface, covers 0.3 % of this area

Devonian granite (pyroxene plus hornblende accessory mineral) - pyroxene-hornblende-biotite granite undivided

Lithology: granite

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

Devonian granite - biotite granite

Lithology: granite

Ordovician - Precambrian Z Ellsworth formation greenstone member (Ordovician - Precambrian Z) at surface, covers 0.2 % of this area

Ordovician - Precambrian Z Ellsworth formation greenstone member

Lithology: greenstone

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

Precambrian Z North Haven Formation

Lithology: greenstone; volcanic rock; mudstone

Devonian granite (porphyritic texture) (Devonian) at surface, covers 0.8 % of this area

Devonian granite (porphyritic texture) - biotite granite undivided

Lithology: granite

Ordovician - Precambrian Z interbedded pelite and quartz sandstone of the Passagassawakeag block (Ordovician - Precambrian Z) at surface, covers 0.2 % of this area

Ordovician - Precambrian Z interbedded pelite and quartz sandstone of the Passagassawakeag block

Lithology: mudstone; sandstone

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

Devonian granite (hornblende accessory mineral); hornblende-biotite granite

Lithology: granite

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

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

Lithology: granite

Undifferentiated mafic to felsic volcanic rocks (Devonian - Ordovician) at surface, covers 0.5 % of this area

Undifferentiated mafic to felsic volcanic rocks

Lithology: mafic volcanic rock; felsic volcanic rock

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

Silurian ultramafic rocks

Lithology: ultramafic intrusive rock

Devonian - Silurian Bar Harbor Formation (Devonian - Silurian) at surface, covers 0.3 % of this area

Devonian - Silurian Bar Harbor Formation

Lithology: sandstone; siltstone; conglomerate

Ordovician - Precambrian Z Ellsworth formation (Ordovician - Precambrian Z) at surface, covers 12 % of this area

Ordovician - Precambrian Z Ellsworth formation

Lithology: phyllite; siltstone

Ordovician - Cambrian Penobscot Formation extensively migmatized area (Ordovician - Cambrian) at surface, covers 0.3 % of this area

Ordovician - Cambrian Penobscot Formation extensively migmatized area

Lithology: migmatite

Precambrian Z rocks of Islesboro (Precambrian Z) at surface, covers 0.4 % of this area

Precambrian Z rocks of Islesboro

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

Devonian gabbro/diorite/ultramafic rocks (Devonian) at surface, covers 3 % of this area

Devonian gabbro/diorite/ultramafic rocks

Lithology: gabbro; diorite; ultramafic intrusive rock

Carboniferous - Devonian unnamed conglomerate and sandstone (Carboniferous and/or Devonian) at surface, covers 0.6 % of this area

Carboniferous - Devonian unnamed conglomerate and sandstone

Lithology: conglomerate; sandstone

Ordovician - Precambrian Z calc-silicate rocks of the Passagassawakeag block (Ordovician - Precambrian Z) at surface, covers 0.2 % of this area

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

Lithology: calc-silicate rock

Devonian quartz monzonite (Devonian) at surface, covers 0.9 % of this area

Devonian quartz monzonite

Lithology: quartz monzonite

Ordovician - Precambrian Z Ellsworth formation quartz granofels member (Ordovician - Precambrian Z) at surface, covers 0.2 % of this area

Ordovician - Precambrian Z Ellsworth formation quartz granofels member

Lithology: granofels

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

Devonian quartz monzonite (hornblende accessory mineral) - hornblende-biotite quartz monzonite

Lithology: quartz monzonite

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

Devonian monzodiorite - Devonian biotite monzodiorite

Lithology: monzodiorite

Devonian - Ordovician Bucksport Formation (Devonian - Ordovician) at surface, covers 6 % of this area

Devonian - Ordovician Bucksport Formation

Lithology: sandstone; limestone; calc-silicate rock

Devonian granite (Devonian) at surface, covers 22 % of this area

Devonian granite

Lithology: granite

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

Devonian syenite - Devonian biotite syenite undivided

Lithology: syenite

Devonian - Precambrian Z Appleton Ridge Formation (Devonian - Precambrian Z) at surface, covers < 0.1 % of this area

Devonian - Precambrian Z Appleton Ridge Formation

Lithology: schist; phyllite

Silurian - Ordovician Vassalboro formation (Silurian - Ordovician) at surface, covers 7 % of this area

Silurian - Ordovician Vassalboro formation

Lithology: sandstone; quartzite; schist; limestone

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

Devonian - Silurian Castine Formation (Devonian - Silurian) at surface, covers 3 % of this area

Devonian - Silurian Castine Formation

Lithology: mafic volcanic rock; felsic volcanic rock