Limestone Landscapes

Beautiful morning sunshine here for a change.  Picked some glass down at the beach and grabbed a few pics of the bright white limestone outcrops at low tide.

'From British Geological Survey - Limestone Landscapes…


The Seaham Residue is interpreted as the insoluble remains of the Fordon Evaporites a mixture of salt (halite) and anhydrite with dolomite. At the type locality just north of Seaham Harbour it is a heterogeneous mass, up to 9 m thick, of angular blocks and fragments of limestone and dolomite in a clayey dolomite matrix. The residue is also exposed south of Blackhall Rocks.
Although itself highly variable, the Seaham Formation is the most uniform of the Late Permian carbonate units. It consists predominantly of thin-bedded limestone with some dolomite, but in places may resemble the Concretionary Limestone. Along with the Roker Dolomite Formation.  The Seaham Formation was once considered to be part of the Upper Magnesian Limestone sequence.
The formation carries a unique and distinctive diagnostic assemblage of alga and bivalves. Small tubular, stick-like remains of the probable alga Calcinema permiana are present in great abundance. The Seaham Formation is exposed mainly in coastal cliffs at Seaham, but is also patchily exposed inland in Seaham Dene. Its type exposure is in the sides of the dock at Seaham Harbour.

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We have a 5 feet x 3 feet x 2 feet lump of it dug up when we were building the house.  We live 500 feet above sea level.