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 Quarterly journal of the Geological Society of London . TAWNET EH TTC BEDS AND SUTTON STONE Fig Vertical Section of Southerndown Cliff Am Conybearii Gryphaea incurva Pholadomya glabra Am Buckiandi Grey argillaceous limestones and shales Pale smooth argillaceous limestone 'feaL Coarse granular shale with cherts