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Geology, Stratigraphic--Precambrian
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Geology, Stratigraphic--Proterozoic
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Portage Lake Volcanics (Mich.)
Portage Lake Volcanics (Mich.)
Geographic
sh92000557
·
id.loc.gov
Used for
Portage Lake Lava Series (Mich.)
Broader Terms (3)
Formations (Geology)--Michigan
Geology, Stratigraphic--Precambrian
Geology, Stratigraphic--Proterozoic
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