Mineralogy and incipient pedogenesis of Entisols in anorthosite terrane of the San Gabriel Mountains, California
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Entisols on anorthosite and associated mafic dikes in the San Gabriel Mountains were examined to determine the influence of contrasting parent materials on soil mineralogy and incipient pedogenesis. Soils are shallow Xerothents on chaparral-covered slopes of 50 to 65% gradient. Soil properties are strongly influenced by the parent material. Denudation rates on the steep, chaparral-covered slopes indicate that no part of the soils, including the Cr horizons, can be older than 400 yr. Pedogenesis is inhibited by high erosion rates on this steep terrain.