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 Section of the lake ridges near Sandusky Ohio.jpeg check categories August Section of the lake ridges near Sandusky Ohio Subject Sandusky Ohio Glacial erosionOhio Geographic Subject United StatesOhioSandusky Tag Polar Cite book Man and the Glacial Period Wright Frederick New York Appleton and Company International Scientific