Diving geologists conducted a survey of part of the shallow continental shelf off the W. coast of Florida. Sedimentary analysis of samples collected from the Gulf bottom show the sediments to become more coarse and more poorly sorted outward from shore. Ripple marks were found to be predominantly wave formed and to roughly parallel the shore. Clypeaster sp. were observed to be destroying the ripple marks in many places. Bedrock which crops out in the area is thought to be the St. Marks facies of the Tampa stage.

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