Page 5 - edwards1947

and southeast. The Del Valle oil field 1 tself' oooupies seotione

15. 16, 17t and 18, T. 4 1., R, 17 w. The Ramona field 1•

1mmed.1atc,ly north and west ot the Del Valle fieldl however,

only that part of it whioh is necessary tor the explanation

ot the geology of' the area as a Whole is included 1n this report.

The area 1s moderately rugged. with differences in relief of

more than 1000 feet, The highest elevation in the area is •ore

than 2200 feet above sea level, with the lowest being less than

s,s feet above sea level.

The entire area drains to the south into the Santa Clara

River, Intermittent streams from the San Martine• Grande
Canyon and the San Martinez Chiquito Canyon drain into the

northeast-southwest :tlowlng Santa Clara River.

m~ ~'!-_, n-t vegetatio.n found here depend upon the aoil

types. The vegetation is commonly more p~W>unoed. on the

north aide of the hills where it does not rece1 ve the direct

rays of the sun. Graas is found on the siltstone, and sandy

siltstiones of the lower :.iico and Repetto f'or•tions, whereas

~a1nly abaparral and cactus grow on the sandstones ot tbe

upper .:2100 and Saugus. Some of tb.e chaparral on the north

slopes is so thick that it is almost impossible to penetrate

it. +.

Outcrops are excellent in this area 1n cl1tfs, canyons,

and BUllies. The numerous road outs found here also greatly

vaeilitated the geologic mapping. Two rather large areaa