https://shale-mudstone-research-schieber.indiana.edu/shale-studies/sonyea-shales.html
Sonyea Shales: Shale Studies: IU Shale Research Lab: Indiana University Bloomington
This page is about a study done on the Devonian Shale Faces that are part of the Sonyea Group in New York by the IU faculty
research labindiana universitysonyeashalestudies