limestone

Crinoids in limestone exposure
  • Location: National Stone Centre, Wirksworth, Derbyshire
  • Date Taken (dd-mm-yy): 20th March 2010

A, sadly not in situ, block of Limestone showing how abundant life was in this cretaceous era lagoon. (battery for scale)

Karstic surface
  • Location: Blaen Onneu Quarry, South Wales
  • Date Taken (dd-mm-yy): 18th March, 2010

This picture shows a cliff of Carboniferous Oolitic Limestone in a disused quarry. The upper surface was kartsified in the Carboniferous with a thick soil on top. The dissolution of the carbonate has left a thick wedge of regolith on top. Note the castellated boundary between the dark grey oolite and the yellow-coloured regolith.

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