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- W2020469764 abstract "ABSTRACT Over 50 pairs of beach and dune samples and 40 river samples were collected from the North Carolina outer banks to Miami Beach, Florida. Median grain size, sorting, percent calcium carbonate and heavy and light mineralogy were determined. Mineralogical counts were made on the .125-.25 mm size fraction only. Apparently beach and dune sands are derived both from nearby rivers and from preexisting sediment on the adjacent shelf. Beach and dune sands contain an unstable assemblage of heavy minerals, unlike the assemblage noted in rivers draining only coastal plain sediments. The heavy mineral assemblage of rivers draining the piedmont is unstable and more closely resembles that of beaches and dunes. Regional mechanical sorting effects are not of primary importance in determining the composition of the heavy mineral suite. Grain size of beach and dune sand is controlled mainly by wave energy and is finest in Georgia and becomes coarser to the north and south. The carbonate content is lowest in Georgia sediments and increases strongly to the south and slightly to the north. The carbonate content is controlled by availability of materials and also by wave energy. The most consistent difference between beaches and dunes is the relative abundance of elongate minerals in beach sediments." @default.
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- W2020469764 date "1965-01-01" @default.
- W2020469764 modified "2023-09-24" @default.
- W2020469764 title "Atlantic Beach and Dune Sediments of the Southern United States" @default.
- W2020469764 doi "https://doi.org/10.1306/74d7139d-2b21-11d7-8648000102c1865d" @default.
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