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 . Quart Journ God Soc Vol XXXIV PL XXL RMintemlith Mmtem Bros imp CORNISH GRE EN STONES Pl XXI Illustration biodiversitylibrary org Geological Society of London Biodiversity Heritage Library The Quarterly journal of the Geological Society of London Geology Periodicals