Focus on Sedimentary Environments

Ancient marine carbonate gravels

Caswell Bay, Gower, South Wales, UK

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A coarser bed within the Caswell Bay Oolite.
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The coarse bed and its basal contact

The base of the coarser bed lies some 3 cm below the base of the scale. Its top lies some 2 cm below the prominent white calcite vein,

What is the nature of the contact between the coarse bed and the finer-grained oolite below it?

Are there any changes in texture between the base and top of the coarser bed?

Think about these questions, and then

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