Reconnoissance Soil Survey of the San Diego Region, California

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated.1918 Excerpt: ... RECONNOISSANCE SOIL SURVEY OF THE SAN DIEGO REGION, CALIFORNIA. By L. C. HOLMES, of the U. S. Department of Agriculture, In Charge, and R. L. PENDLETON, of the University of California.--Area Inspected by MACY H. LAPHAM. DESCRIPTION OF THE AREA. Location. The San Diego region is situated in the extreme southwestern corner of California, including that part of the State lying west of longitude 116 30' and south of latitude 33 30'. It is bounded on the west by the Pacific Ocean and on the south by the international boundary line separating the United States and Mexico. The coast line trends southeastward, and the width of the area east and west diminishes from about 72 miles along its northern to about 37 miles on its southern boundary. It is approximately 66 miles in length, north and south, and contains 3,182 square miles, or 2,036,480 acres. The area comprises the western two-thirds of San Diego County, containing practically all the developed parts of the county, together with small parts of Riverside.and Orange Counties.1 Topography. The greater part of the area is distinctly mountainous and rugged, but it contains numerous sharply outlined small valleys or basins. The area includes most of the ranges and plateaulike uplands lying between the southern part of the interior desert basin of California and the ocean. Along the western margin lies a rather sharply defined coastal plain, presenting a striking contrast to the prevailing mountainous 1 The area coincides In extent with Southern California Sheet No. 2 of the TT. S. Geological Survey, which Is compiled on a reduced scale from several topographic sheets. These were used as bases in the preparation of the soil map accompanying this report. 5 Fig. 1.--Sketch map showing location of the San Diego area, ...