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Two views of the rippled dunes at the Sandy Tongue dive site. These
sands are a hundred percent biogenic, comprised of shells and tests of small
organisms, such as foraminifera, mollusks, and echinoderm spines. Dunes at this
location measured 3 to 4.5 m high. Dunes at the Coral Mounds dive
site were as high as 15 m.
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