Generalized subsurface geology of the water-bearing deposits, northern San Joaquin Valley, California
Open Access
- 1 January 1972
- report
- Published by US Geological Survey
Abstract
The study area includes about 5,000 square miles of the northern part of the San Joaquin Valley, a broad structural trough drained by the San Joaquin River. Fresh ground water is mostly in unconsolidated deposits derived from the Coast Ranges on the west and the Sierra Nevada on the east.. The interfingering of Coast Range and Sierran alluvium, together with the variability and lenticularity of each, causes variation in the hydrologic properties both vertically and horizontally in San Joaquin Valley deposits. A persistent confining stratum, the Corcoran Clay Member of the Tulare Formation, can be correlated through most of the study area. Informally, the deposits above the clay are termed the upper units the clay is termed the confining clay stratums and the deposits from the bottom of the clay to the base of fresh water, where known, are termed the lower unit. The upper unit is composed of beds,...This publication has 0 references indexed in Scilit: