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Interactive Geologic Map of the Grand Canyon

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This work-in-progress represents a spectacular set of data generated by George Billingsley and others at the USGS. The geologic data shown here was taken from the following USGS publications:
- Geologic map of the Mount Trumbull 30 x 60 quadrangle
- Geologic map of the Grand Canyon 30' x 60' quadrangle
- Geologic map of the Valle 30' x 60' quadrangle
- Geologic Map of the Cameron 30' x 60' Quadrangle
- Geologic Map of the Peach Springs 30' x 60' Quadrangle
- Geologic map of the Tuba City 30' x 60' quadrangle

URL:http://rclark.github.io/grand-canyon-geology/

Submitted by elementlist on Apr 09, 2017

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