Image:Cretaceous seaway.png
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Map of North America highlighting the shallow inland seaways present during the mid-Cretaceous period. By William A. Cobban and Kevin C. McKinney, USGS. (Image has been slightly modified by uploader to remove "CO" state designation.)
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This image is in the public domain because it contains materials that originally came from the United States Geological Survey, an agency of the United States Department of Interior. For more information, see the official USGS copyright policy |
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