Focus on Sedimentary Environments

Ancient marine carbonate gravels

Caswell Bay, Gower, South Wales, UK

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A closer view of the contact. The coin is 27 mm in diameter.

The basal contact

What is the nature of the contact between the coarser upper unit and the finer-grained lower unit?

What do the base and texture of the unit tell us about the likely conditions of deposition? (at this stage, think about processes rather than specific environments).

Think about your answers, and then

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