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:
The Lower Siluric shales of the Mohawk valley Page BHL. The Lower Siluric shales of the Mohawk valley by Rudolf Ruedemann Page Text Illustration biodiversitylibrary org title Ruedemann Rudolf NOTINCOPYRIGHT Biodiversity Heritage Library PDold The Lower Siluric shales of the Mohawk valley Images uploaded by Files from the