the image is a back button

Geological Map of England and Wales, scale about 12 miles to 1 inch, by Andrew C Ramsay, Director of the Geological Survey, published by Edward Stanford, Charing Cross, London, 1866. (Ramsay 1866)
You can open the stratigraphical column in a new window to use with the map. You have to close this new window by hand
button   stratigraphical column.

button to lakes menu   Lakes Guides menu.