Unified Interior Regions

California

The Southwest Region includes California, Nevada, and Arizona. The Regional Office, headquartered in Sacramento, provides Center oversight and support, facilitates internal and external collaborations, and works to further USGS strategic science directions.

States L2 Landing Page Tabs

Filter Total Items: 1,076
California vineyard
July 3, 2006

California vineyard

A photo of a California (ecoregion 6) grape vine taken during field verifcation of Land Cover Trends project.

June 29, 2006

PubTalk 6/2006 — Geology on Conveyor Belts

New ideas on Bay Area evolution from a decade of geologic mapping

By Russ Graymer, Geologist

 

  • What was the Bay Area like during the Age of Dinosaurs?
  • Learn about the distant origins of some rocks seen around the bay
  • Hear how the San Andreas fault system has rearranged the region.
  • Volcanoes in
May 25, 2006

PubTalk 5/2006 — What Lies Beneath?

Concealed sedimentary basins and hidden oil under Silicon Valley

By Richard G. Stanley, Geologist 

 

  • Before computers and cubicles there were orchards-- and a few oil wells, too
  • Learn about the "oil boom" in Los Gatos about 100 years ago
  • See how historical records from old oil wells, together with modern
Image: Killdeer
May 23, 2006

Killdeer

Birds found in and around the Salton Sea, California.

Attribution:
Photo of a fallow field with exurban development in the background
May 1, 2006

Fallow field with exurban development in the background in CA

Fallow field with exurban development in the background in California. This photo was taken for the Trends Landcover project during field work. 

April 27, 2006

PubTalk 4/2006 — California's Greatest Fault

How historical data from 1906 have shed light on the San Andreas Fault

By Carol S. Prentice, Geologist 

 

  • What insights are gained from merging original 1906 observations and field notes with today's earthquake science?
  • Data collected during and after the catastropic 1906 earthquake prove to be essential to-
Tamarisk growing along a river
April 22, 2006

A single species stand of nonnative tamarisk

Single species stand of nonnative tamarisk on the Lower Colorado River at Cibola National Wildlife Refuge, California

Small tress re-growing after a fire
April 22, 2006

Nonnative tamarisk re-grows following a wildfire

Nonnative tamarisk is resistant to wildfire, in part because of its ablity to re-sprout.

Shrubs re-sprout after a wildfire
April 22, 2006

Nonnative tamarisk re-sprouts after wildfire

Nonnative tamarisk is resistant to wildfire, in part due to its ability to resprout

A tamarisk plant with many pink flowers
April 22, 2006

Tamarisk plants can make many flowers

Tamarisk plants have been sucessful in southwestern US river- and stream-side habitats, in part because of its ablity to make many flowers and, therefore, seeds.

Picture of a valley in California depicting residential housing
April 1, 2006

A valley shot with residential housing in California

Photograph taken during a Land Cover Trends Project field trip in California of a valley with residential housing.

A picture of a wind farm in California
April 1, 2006

A wind farm in California

A wind farm with many wind mills on a hiil in California. The picture was taken during a field trip for the Land Cover Trends project.

Filter Total Items: 963
USGS science for a changing world logo
March 6, 2001

Removing abandoned forest roads and restoring the natural characteristics of slopes and stream channels in the Redwood National and State Parks in northern California have substantially reduced the delivery of sediment to salmon-bearing streams, according to a research geologist with the U.S. Geological Survey.

USGS
March 6, 2001

Removing abandoned forest roads and restoring the natural characteristics of slopes and stream channels in the Redwood National and State Parks in northern California have substantially reduced the delivery of sediment to salmon-bearing streams, according to a research geologist with the U.S. Geological Survey.

USGS science for a changing world logo
February 19, 2001

Like the Florida Everglades, California’s Sacramento-San Joaquin River Delta has been radically transformed by human activities. In the past three decades, monitoring programs have documented remarkable declines in living resources from primary producers to fish. 

USGS
February 19, 2001

Like the Florida Everglades, California’s Sacramento-San Joaquin River Delta has been radically transformed by human activities. In the past three decades, monitoring programs have documented remarkable declines in living resources from primary producers to fish. 

USGS science for a changing world logo
February 5, 2001

Aerial photographs supplied to the Santa Clara County Sheriff’s Search and Rescue Team, by the U.S. Geological Survey, are being used to search for the remains of Xiana Fairchild. A child’s skull, which was found near Lexington Reservoir on January 19, has been identified through dental records and DNA tests, as that of the missing 7-year-old Vallejo girl who disappeared in December 1999.

USGS
February 5, 2001

Aerial photographs supplied to the Santa Clara County Sheriff’s Search and Rescue Team, by the U.S. Geological Survey, are being used to search for the remains of Xiana Fairchild. 

USGS science for a changing world logo
January 22, 2001

A new geologic map of surficial deposits in the nine-county San Francisco Bay region that can be used to evaluate earthquake hazards has been released in digital form by the U.S. Geological Survey in Menlo Park.

USGS
January 22, 2001

A new geologic map of surficial deposits in the nine-county San Francisco Bay region that can be used to evaluate earthquake hazards has been released in digital form by the U.S. Geological Survey in Menlo Park.

USGS science for a changing world logo
January 16, 2001

In conjunction with the seventh anniversary of the 1994, 6.7 Northridge earthquake, the U.S. Geological Survey, in cooperation with the Southern California Earthquake Center (SCEC) and the National Science Foundation (NSF), has produced a two-page fact sheet that explains how geologic conditions in the Los Angeles basin affect the amount of shaking experienced by various areas of the basin.

USGS
January 16, 2001

In conjunction with the seventh anniversary of the 1994, 6.7 Northridge earthquake, the U.S. Geological Survey, in cooperation with the Southern California Earthquake Center (SCEC) and the National Science Foundation (NSF), has produced a two-page fact sheet that explains how geologic conditions in the Los Angeles basin affect the amount of shaking experienced by various areas of the basin.

USGS science for a changing world logo
December 21, 2000

DNA sequence data revealed a deep genetic split between common ravens from the southwest United States compared to the rest of the world, according to a journal article in the December 22 issue of the Proceedings of the Royal Society of London, Biological Sciences.

USGS
December 21, 2000

The common raven in California is not so common after all, according to a team of scientists at the U.S. Geological Survey and other research institutions involved in new genetics research.