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 west of but have no doubt that the fossiliferous gravels will be found to lie in similar concavity to those at Grays and Crayford where the Thanet sands and chalk have been exposed The material for the beds and seems to have descended