This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
FMIB Map Showing the Glacial Geology of the United States.jpeg check categories August Map Showing the Glacial Geology of the United States Subject United StatesMaps Glacial erosionUnited StatesMaps Geographic Subject United States Tag Polar Cite book Man and the Glacial Period Wright Frederick New York Appleton and Company