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 . GEIKIE Otf THE SUPPOSED obliterated though lines of pebbles can be traced which appear to indicate that the strata are nearly vertical On the opposite side of the river another junction of the granite with the Cambrian beds can be seen The latter consist of greenish