AMERICAN PHILOSOPHICAL SOCIETY / SCIENCE PHOTO LIBRARY AMERICAN PHILOSOPHICAL SOCIETY / SCIENCE PHOTO LIBRARY
Geological map of Europe, 1860. The key for this colour-coded map is at top left. The sedimentary rocks are colour-coded by geological period, from most recent (top) to most ancient (bottom). This map was executed under the direction of the British geologist Joseph Prestwich (1812-1896).
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