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 Dec of the north side of this hill viz Graptolites Sagittarius and branch ing Graptolite Tracks likewise are seen on the surfaces of some of the more flaggy strata On their strike the rocks of Keskadale and Aiken Knots extend