File:USGS 2006 1237 Table2 Stratigraphy Middle Devonian.svg
Portion used is clip from Middle Devonian section.
Vertical bars represent w:unconformity.
Licensing
This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior. For more information, see the official USGS copyright policy.
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