"[Lot of 2] Geologic Map of Parts of Los Angeles and Ventura Counties California [and] Geologic Map and Sections of the Puente Hills Region, Southern California", U.S. Geological Survey (USGS)
Period: 1924-25 (dated)
Color: Printed Color
1) Geologic Map of Parts of Los Angeles and Ventura Counties California Washington D.C., 1924 (56.5 x 36.8"). Very large, colorful map based on the geology of William S.W. Kew, Carroll M. Wagner, Walter A. English and John P. Buwalda in 1917, 18, 19 and 22. The map uses color and pattern to delineate sedimentary and igneous rocks, geologic boundaries, axes, beds, oil wells, natural gas wells, derricks, brae deposits, and surface outcroppings of sand. The map is dissected and laid on linen. It has some staining and several sections are starting to detach from the linen. The linen has some areas of minor loss along the folds, some reinforced with white tape on verso. Previous owner's name is written and stamped on verso. Grade B+.
2) Geologic Map and Sections of the Puente Hills Region, Southern California Washington D.C., 1925 (29 x 32.3"). A large, colorful map based on the geology by W.A. English and W.S.W. Kew surveyed in 1918. The map shows, by use of color and pattern, Alluvium, Terrace deposits, San Pedro Formation, Fernando group, Puente Formation, Topanga Formation, Vaqueros and Sespe, Tejon Formation, Martinez Formation, Chico and Trabucco Formation, Intrusive and Extrusive rocks, Axis of incline, axis of syncline, and Faults. Also noted are oil wells, oil seepage, strike and dip of beds, strike and dip of overturned beds, horizontal beds and the strike of vertical beds. Plate I from Bulletin 768. Dissected and laid on linen. Previous owner's name is written and stamped on verso. Grade A.