Focus on Sedimentary Environments

Ancient marine carbonate sands

Caswell Bay, Gower, South Wales, UK

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sedimentary structure
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Sedimentary structures


The image above shows a cross section, perpendicular to bedding. The coin is 27 mm in diameter.

What are the sedimentary structures seen here? Describe them in terms of type, shape and size. What do they tell us about the conditions of sedimentation? Write your answers, then check them.


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