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:
Cuyahoga Valley National Park geologic cross section. en Cuyahoga Valley National Park geologic cross section Geology and Mineral Resources of the Cleveland District Ohio USGS Bulletin Cushing Frank Leverett and Frank Van Horn other versions PDUSGov Cuyahoga Valley National Park Geological cross sections of the United States