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 . CALCIFEEOtJS SAiraSTONE OF FIFE Fig Diagrammatic Vertical Section of the Oalciferous Sandstones from the west of Pittenweem to Anstruther showing the position of the Zones of Marine Fossils Scale feet to inch Base of Car boniferous Limestone Zone Characteristic