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 . PROCEEDINGS OF THE GEOLOGICAL SOCIETY removed from the rock readily falls apart so that even the beds of fine sand and soft marl yield less to the denuding agents than does this bed When first the bed appears at the beach it is overlain by one of fine red sand which