Oystermouth Old Quarry
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Geology & landscape
Geological Period: Carboniferous · Rock Type: Carboniferous Limestone, Limestone
Description
Description This site shows the ‘Black Lias’ facies of the Upper Limestone Shales, now called the Oystermouth Beds. These uppermost Brigantian marine shales and muddy limestones contain a common Carboniferous limestone fauna of brachiopods, corals and the trilobite Griffithides. This facies marks the final phase of carbonate deposition in South Wales in the Carboniferous Limestone.