Elsinore Trough
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The Elsinore Trough is a
graben In geology, a graben () is a depression (geology), depressed block of the Crust (geology), crust of a planet or moon, bordered by parallel normal faults. Etymology ''Graben'' is a loan word from German language, German, meaning 'ditch' or 't ...
rift valley A rift valley is a linear shaped lowland between several highlands or mountain ranges produced by the action of a geologic rift. Rifts are formed as a result of the pulling apart of the lithosphere due to extensional tectonics. The linear ...
in
Riverside County Riverside County is a county located in the southern portion of the U.S. state of California. As of the 2020 census, its population was 2,418,185, making it the fourth-most populous county in California and the 10th-most populous in the Unit ...
, southern
California California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...
. It is created by the Elsinore Fault Zone. It is located between the
Santa Ana Mountains The Santa Ana Mountains are a short peninsular mountain range along the coast of Southern California in the United States. They extend for approximately southeast of the Los Angeles Basin largely along the border between Orange and Riversid ...
to the west, and the
Temescal Mountains The Temescal Mountains, also known as the Sierra Temescal ( Spanish for "sweat lodge range"), are one of the northernmost mountain ranges of the Peninsular Ranges in western Riverside County, in Southern California in the United States. They ex ...
of the
Perris Block The Perris Block is the central block of three major fault-bounded blocks of the northern part of the Peninsular Ranges. The Perris Block lies between the Santa Ana Block to the west and the San Jacinto Block to the east. The Perris Block, was n ...
and the
Temecula Basin Temecula Basin is a sedimentary basin, which, along with the Aguanga Basin, is part of the Elsinore Fault Zone, in southwestern Riverside County, California. The Temecula Basin is a basin of down faulted Mesozoic basement rock, overlain by late C ...
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 Elsinore Valley is a graben rift valley in western Riverside County, California, a part of the Elsinore Trough. The Elsinore Valley is a graben between the Santa Ana Block to the southwest and the Perris Block on the northeast. It is a complex ...
,
Temecula Valley The Temecula Valley (Spanish language, Spanish: ''Valle de Temecula'') is a graben rift valley in western Riverside County, California. The Temecula Valley is one of the graben valleys making up the Elsinore Trough, created by the Elsinore Fau ...
and Wolf Valley. The cities of
Corona Corona (from the Latin for 'crown') most commonly refers to: * Stellar corona, the outer atmosphere of the Sun or another star * Corona (beer), a Mexican beer * Corona, informal term for the coronavirus or disease responsible for the COVID-19 ...
, Lake Elsinore, Murrieta,
Temecula Temecula (; , ; Luiseño: ''Temeekunga'') is a city in southwestern Riverside County, California, United States. The city had a population of 110,003 as of the 2020 census and was incorporated on December 1, 1989. The city is a tourist and ...
, and Wildomar; the
census-designated place A census-designated place (CDP) is a Place (United States Census Bureau), concentration of population defined by the United States Census Bureau for statistical purposes only. CDPs have been used in each decennial census since 1980 as the counte ...
of Temescal Valley; and the Reservation of the
Pechanga Band of Luiseno Mission Indians The Pechanga Band of Indians, also known as ''Payómkawichum'' (the People of the West), stand as 1 of 6 federally recognized tribes of Luiseño Indians, currently located in Riverside County, California. The modern understanding of the tribe, P ...
are located in the Elsinore Trough.


References

Valleys of Riverside County, California Geology of Riverside County, California Inland Empire Valleys of California {{RiversideCountyCA-geo-stub