SGMC Geology
USGS State Geologic Map Compilation (SGMC) showing rock units, faults, contacts, and structural features. Look for gold-bearing formations like greenstone belts, quartz veins, and serpentinite contacts.
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© Mapbox, © MaxarSatellite imagery © Mapbox, © Maxar. Layer data from the sources named on each card.
About this layer
Geological maps divide the ground into rock or sediment units. Colours and patterns tell you which mapped unit is present; use the legend to read them. Compare the boundaries with mineral records, without assuming one rock type guarantees gold.
What it is for
Use the legend to identify colours and line symbols. Compare rock boundaries and structures with mineral records and terrain.
Limits
Geological maps simplify the ground at their stated scale. Boundaries are interpretations and may not match what is exposed at the surface.
Where it works in USA gold.
Drawn in each state.
© Mapbox, © MaxarAlabama Explorer
© Mapbox, © MaxarArizona Explorer
© Mapbox, © MaxarColorado Explorer
© Mapbox, © MaxarGeorgia Explorer
© Mapbox, © MaxarIdaho Explorer
© Mapbox, © MaxarMontana Explorer
© Mapbox, © MaxarNevada Explorer
© Mapbox, © MaxarNew Mexico Explorer
© Mapbox, © MaxarNorth Carolina Explorer
© Mapbox, © MaxarOregon Explorer
© Mapbox, © MaxarSouth Carolina Explorer
© Mapbox, © MaxarUtah Explorer
© Mapbox, © MaxarVirginia Explorer
© Mapbox, © MaxarWashington Explorer
Satellite imagery © Mapbox, © Maxar. Layer data from the sources named on each card.
Where the data comes from.
Data provided by the U.S. Geological Survey (USGS), Bureau of Land Management (BLM), U.S. Forest Service (USFS), and ReportAll USA (Licensed), licensed under USGS Public Domain and other applicable licenses USGS Public Domain
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Satellite imagery © Mapbox, © Maxar. Layer data from the sources named on each card.
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Free to download on iPhone and Android.
On iPhone? Get it on the App StoreOn Android? Get it on Google Play
Free to download on iPhone and Android.
7-day free trial on yearly plans · Nothing charged until it ends · Cancel anytime.
On your phone: App Store · Google Play
7-day free trial on yearly plans · Nothing charged until it ends · Cancel anytime.
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