Geochemistry of sediments from Quaternary sand ramps in the southeastern Mojave Desert, California
作者： Patrick P Pease , Vatche P Tchakerian
DOI: 10.1016/S1040-6182(02)00132-5
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摘要: Abstract Trace element analyses of sediment from sand ramps in the Bristol Trough and Clark's Pass aeolian corridors Mojave Desert, California were conducted to determine their depositional history relation sources within transport corridors. Sand are topographically controlled systems consisting amalgamated accumulations aeolian, fluvial talus deposits. These landforms contain a variety deposits formed different environments are, therefore, valuable source paleoenvironmental information. Sediments studied three ramps, Iron Mountain, Big Maria, Dale Lake ramps; two sheets, Rice Valley Cactus Plain. Plain is located on eastern side Colorado River, Arizona, but previous researchers have suggested that it related western (California) side. Geochemical data units individual indicate for each ramp changed through time, probably as availability local fluvial/playa response climate fluctuations. Analyses also composed discrete, sources. not integrated, thus corridor does act coherent pathway. Comparisons indicates sand, east River was derived west river.
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