Focus on Sedimentary Environments

Modern subtropical carbonate beach

Sombrero Beach, Marathon, Florida Keys, USA

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thin section, PPL
enlarged image

Thin section of beach sand, viewed in plane-polarized light



Identifying carbonate grains

View the sediment in plane- and cross-polarized light, and in the enlarged views. Make a list of all the skeletal fragments you can identify, then check your answer.

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Page © ; last updated 29 July, 2002