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 effect of the glacial dam at Cincinnati.jpeg Map showing the effect of the glacial dam at Cincinnati Subject OhioMaps Glacial epochOhioMaps LakesOhioMap Lake OhioMaps Geographic Subject United StatesOhio Tag Polar Cite book Man and the Glacial Period Wright Frederick New York Appleton and Company International