Geologic Maps

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Geologic Maps

• Geology 100
• Geology for Environmental Scientists

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Geologic Map of the US
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Symbols found on geologic maps
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Horizontal Strata
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Geologic map of part of the Grand Canyon. Each
color represents a different formation.
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Inclined Strata
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Dome
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Geologic map of the Black Hills of South Dakota,
a large structural dome.
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The Black Hills of South Dakota are a structural
dome.
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Basin
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Bedrock geologic map of the Great Lakes region
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Michigan Basin
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Surficial geology map of the Great Lakes region
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Plunging Folds
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Geologic map of Valley and Ridge of Pennsylvania
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Satellite image of central Appalachians
Area in last picture
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False color satellite image of folded sedimentary
rocks, central Appalachian Mountains.
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Faults
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Geologic map of thrust belt in Montana
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Angular Unconformity
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Geologic Map of the southern Appalachians. Note
the Nashville Dome, folds, faults, and an
unconformity.
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Method for constructing a geologic cross section