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For 2 years samples have been obtained with an N.E.L. spade corer from the nearshore waters of the Georgia coast. During the past year, work has been concentrated on sampling in the coastal rivers, sounds, and estuaries of the Sea Island section of Georgia. Approximately 300 spade cores have been collected at 150 stations in 12 rivers and estuaries.
A tremendous variety of sediments and substrates are indicated by the sampling results. Sediment textures in the estuaries and rivers range from clay to gravel. Rivers such as the Satilla, Altamaha, and Ogeechee, which have their sources far inland, are characterized by clean, well-sorted sand, whereas closed sounds such as Doboy and Sapelo Sounds appear to be the sites of silt and mud accumulation. Exposures of Miocene bedrock, indicating the absence of any Holocene sediment accumulation, are found at several locations in the St. Marys and Turtle Rivers. All the samples reflect the mixing, to some extent, of Pleistocene and Holocene sediments. Mixed assemblages of Miocene, Pleistocene, and Holocene macroinvertebrate fossils have been found.
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