Elsinore Trough

The Elsinore Trough is a graben rift valley in Riverside County, southern California. It is created by the Elsinore Fault Zone.

Part of the Elsinore Trough looking south from hills of North Elsinore

It is located between the Santa Ana Mountains to the west, and the Temescal Mountains of the Perris Block and the Temecula Basin to the east.

This graben valley is broken into a series of sections by transverse faults. These smaller graben valleys are the Temescal Valley, Elsinore Valley, Temecula Valley and Wolf Valley.^[1][2]

The cities of Corona, Lake Elsinore, Murrieta, Temecula, and Wildomar; the census-designated place of Temescal Valley; and the Reservation of the Pechanga Band of Luiseno Mission Indians are located in the Elsinore Trough.

References

1. Rene Engel, Geology and Mineral Deposits of the Lake Elsinore Quadrangle California, California Department of Natural Resources, Bulletin 146, Division of Mines, San Francisco, 1959, pp. 14, 55-51.
2. Robert A. Larson; James E. Slosson (1997). Storm-induced Geologic Hazards: Case Histories from the 1992-1993 Winter in Southern California and Arizona. Fig. 1. Vol. 11. Geological Society of America. p. 50. ISBN 978-0-8137-4111-6.

33°41′N 117°22′W