General geologic map of the world

World geology compiled by the Geological Survey of Canada at approximately 1:35,000,000 scale, published there as Open File Report 2915.

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https://mrdata.usgs.gov/services/worldgeol (WMS, version 1.3.0)

https://mrdata.usgs.gov/services/wfs/worldgeol (WFS, version 1.1.0)

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