Warm, crystal-clear, shallow tropical seas floored by lime muds and the remains of countless marine shells. These limestones reach the surface in Derbyshire, forming the attractive scenery of the White Peak.
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Carboniferous limestone scenery
in the Yorkshire Pennines, near Malham
(Reproduced by permission of the British Geological Survey. © NERC.
All rights reserved. IPR/24-3C)