Briones Valley

Last updated March 16, 2019

The Briones Valley is a major geological feature of Contra Costa County, California and runs between Mount Diablo and the county seat of Martinez. Also it is the seat of many riparian watersheds, especially of Alhambra Creek.^[1]

Contra Costa County is a county in the state of California in the United States. As of the 2010 census, the population was 1,049,025. The county seat is Martinez. It occupies the northern portion of the East Bay region of the San Francisco Bay Area, and is primarily suburban. The county's name is Spanish for "opposite coast", referring to its position on the other side of the bay from San Francisco. Contra Costa County is included in the San Francisco–Oakland–Hayward, CA Metropolitan Statistical Area.

Mount Diablo is a mountain of the Diablo Range, in Contra Costa County of the eastern San Francisco Bay Area in Northern California. It is south of Clayton and northeast of Danville.

Martinez is a city in and the county seat of Contra Costa County, California, in the East Bay of the San Francisco Bay Area. The population was 35,824 at the 2010 census. The downtown is notable for its large number of preserved old buildings and antique shops. Martinez is located on the southern shore of the Carquinez Strait in the San Francisco Bay Area, directly facing the city center of Benicia and the southeastern end of Vallejo, California.

Coordinates: 37°54′50″N122°12′30″W / 37.91389°N 122.20833°W / 37.91389; -122.20833 ^[1]

Geographic coordinate system Coordinate system

A geographic coordinate system is a coordinate system that enables every location on Earth to be specified by a set of numbers, letters or symbols. The coordinates are often chosen such that one of the numbers represents a vertical position and two or three of the numbers represent a horizontal position; alternatively, a geographic position may be expressed in a combined three-dimensional Cartesian vector. A common choice of coordinates is latitude, longitude and elevation. To specify a location on a plane requires a map projection.

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References

1 2 "Feature Detail Report for: Briones Valley". Geographic Names Information System . United States Geological Survey.

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[GNIS-1] 1 2 "Feature Detail Report for: Briones Valley". Geographic Names Information System . United States Geological Survey.