geologic map of isle royale national park - geo.mtu.edu map of isle royale national park ... unknown...
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May 2008
National Park ServiceU.S. Department of the Interior
Geologic Map of Isle Royale National Park
Isle Royale National ParkMichigan
Produced by Geologic Resources Division
¬ 0 5 102.5 Miles
Geologic Attitude and Observation Localities
o
strike and dip of beds
¹
strike and dip of lava flows
: downthrown side of fault
Mine Feature Localiteis
Ì prospect pit
» mine shaft
# diamond drill hole
Paleoshorelines
beach crest, known or certain
wave-cut cliff, known or certain
wave-cut cliff, approximate
Glacial Line Features
direction of glacial movement, known or certain
drumlin, known or certain
kettle, known or certain
Faults
unknown offset/displacement, know or certain
unknown offset/displacemen, approximate
unknown offset/displacement, concealed
Linear Geologic Units
base of pegmatitic zone in Greenstone Flow (pg)
0 7.5 153.75Kilometers
Geologic Contactsknown or certainapproximateconcealed
% % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % gradationalshorelineshoreline, approximate
Geologic UnitsQal - alluviumQts - talus, slopewash, and glacial driftQg - glacial tillcu - Copper Harbor Conglomerate, undividedcc - Copper Harbor Conglomerate, chiefly conglomeratecb - Copper Harbor Conglomerate, boulder and cobble conglomeratecp - Copper Harbor Conglomerate, pebble conglomeratecs - Copper Harbor Conglomerate, chiefly sandstonepu - Portage Lake Volcanics, lava flows, undividedpsc - Portage Lake Volcanics, sandstone and conglomeratepp - Portage Lake Volcanics, pyroclastic rockspsp - Portage Lake Volcanics, Scoville Point Flowpei - Portage Lake Volcanics, Edwards Island Flowpmp - Portage Lake Volcanics, Middle Point Flowpli - Portage Lake Volcanics, Long Island Flowpth - Portage Lake Volcanics, Tobin Harbor Flowpwi - Portage Lake Volcanics, Washington Island Flowpg - Portage Lake Volcanics, Greenstone Flowpgi - Portage Lake Volcanics, Grace Island Flowpm - Portage Lake Volcanics, Minong Flowph - Portage Lake Volcanics, Huginnin Flowphp - Portage Lake Volcanics, Hill Point Flowpai - Portage Lake Volcanics, Amygdaloid Island Flowwater