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~, <br />Thickness (Ft,) Description <br />9.0 Clay, silty, light brown, with a thin <br />layer of light orange sandy silt near the top. <br />0 B Gravel lens <br />6.0 Silt, sandy, light-colored <br />4.0 Sand, silty, light-orange <br />Bottom of channel <br />The alluvial deposit along Santa Clara Creek, about 150 feet below <br />the confluence with Black Hawk Canyon was also measured and was found to <br />contain mere clay as described below. Santa Clara valley profile is flat and <br />much wider than that of Black Hawk Canyon (Figure x.06,8-5). <br />Section C: East bank of Santa Clara Creek, about 150 feet below <br />confluence with Black Hawk Canyon, <br />Thickness (Ft,) Description <br /> <br /> <br />.- <br />0 - 3.1 Clay, silty, dark; separated from the <br /> underlying horizon with a 3-inch black <br /> clay band. <br />3.1 - 4.5 Clay, silty, light colored; separated <br /> from the underlying horizon xith a 3-inch <br /> black clay band. <br />4.5 - 6.5 Clay, silty, light colored with 2 to 5 <br /> inches of sandy silt near the top and <br /> 3 inch of black clay at the bottom, <br />6.5 - 10.4 Clay, dark; with 6 inches of silty sand <br /> layer at the top. <br /> Bottom of creek <br />About 200 feet downstream from the bridge crossing the Black Hawk Canyon, <br />the Trinidad Sandstone outcrops on the north side of the channel. The <br />sandstone is light orange to brown, medium grained, thin to medium bedded with <br />interbeds of thin lenses of shale. The beds strike at 1~0° and dip 6° to the <br />southwest, <br />JFSA-70 <br />~~•~- 3~6 <br />). F. SA7O b ASSOCUTES, INC. <br />