Geological Map of England & Wales
Stunning geological case map of England and Wales.
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The English began the world’s first national geological survey in 1835 as a branch of the Ordnance Survey (for reference, the U.S. Geologic Survey wouldn’t be founded until 1879). This map is the 4th edition of the ~40 years of cumulative survey work, published under the contemporary director general, Sir Andrew Ramsay.
Using color to great effect, the image shows the geological substrata and relative age of England and Wales, listing over 25 individual types of surface that can be found below the surface of the island. One color of particular importance was grey, which represented the great coal measures in southern Wales and northern England that powered much of the Industrial Revolution. Several profiles of various points along the coastline show the stratified nature of the underlying rock, but the theory of plate tectonics that allowed for such terrestrial construction wouldn’t be proposed for another 50 years or so.
Publication Date: 1877
Author: Andrew Ramsay
Sheet Width (in): 33.50
Sheet Height (in): 40.50
Condition Description: The map is in excellent condition, dissected and mounted on linen. Some spots of offsetting and minor discoloration, but the lithographed color is bright and fine. With original slipcase.