Introduction This map is a preliminary product of the Southern California Digital 1:100,000 Geologic Map Series (Southern California Areal Mapping Project—SCAMP; Morton and Kennedy, 1989). The 1:24,000 manuscript for this map was compiled from original sources, chiefly at 1:24,000, and scanned and processed digitally using the U.S. Geological Survey Alacarte menu-driven interface (Wentworth and Fitzgibbon, 1991) for ARC/Info, a commercial geographic information system (GIS) available from Environmental Systems Research Institute, Redlands, California. This 1:24,000 quadrangle is one of sixteen that form the east half of the Los Angeles 1:100,000 quadrangle; the 1:24,000 quadrangles form the basic data supporting the regional-scale quadrangle, and thus include available data on exploratory oil wells and fossil collections. Stratigraphic nomenclature is largely that of the source materials; it is subject to further modification as compilation progresses. Minot adjustments have been made in geologic boundaries to conform to the metric base, which was enlarged from 1:100,000. Base-map layers, drainage, roads, and topo contours, were prepared from publicly available digital line graph (DLG) data for the 1:100,000 Los Angeles metric topographic map by R.H. Campbell, U.S. Geological Survey, Reston, Virginia. |
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