These are actually matching maps that together describe the geology of Great Britain. The first map is the northern sheet which carries the full title in a panel with engraved vignettes of skeletons, fossils, and the head of a Saber-toothed Tiger. The lower sheet contains the legend which identifies an amazing 25 different formations with hand coloring and engraved texture. To the sides of the legend are numerous fossil Ammonites. Both sheets are filled with notations and tables. The maps are from the Sketches and Notes of Professor Edward Forbes, F.R.S., President of the Royal Geological Society. Surrounded by keyboard-style border. Blank verso.

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Condition: A

Beautiful examples with strong color and dark impression on thick paper with original margins. The northern sheet with a short marginal split at bottom reaching the border.