Unified Interior Regions

Arizona

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: 226
Image: San Carlos River near Peridot, Southern Arizona - 1940
March 21, 1940

San Carlos River near Peridot, Southern Arizona - 1940

In 1940, the gaging station for the San Carlos River was on a railroad bridge south of the little town of Peridot. This downstream view from that bridge shows the gage house on the extreme left and a safety railing next to it. The channel is wide following a flood, and scattered Frémont cottonwood trees are along channel right. The dense shrubs on the low terrace on the

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Attribution: Land Resources
Image: Huérfano Butte, Santa Rita Experimental Range, Southern Arizona - 1902
April 1, 1902

Huérfano Butte, Santa Rita Experimental Range, Southern Arizona - 1902

Ground repeat photography location 233 looking west at Huérfano Butte, at 1,159-meter elevation. In 1902, photographer David Griffiths’ horse-drawn buggy was clearly visible in the open grassland, and scattered desert hackberry plants were behind and on either side of the buggy. (David Griffiths).

Attribution: Land Resources
USGS
October 22, 2018

In situ observations of the physical properties of the Martian surface

In situ observations of the physical properties of the Martian surface.

Image: Taking Readings in the Grand Canyon

Taking Readings in the Grand Canyon

USGS Aquatic Ecologist, Ted Kennedy, getting a reading off the flow meter.

USGS
October 1, 2018

Planetary Geologic Mapping Handbook 2010

Planetary Geologic Mapping Handbook 2010

Image: Arizona Road

Arizona Road

A road winds through BLM public lands in Arizona.

USGS
October 22, 2018

Volcanic Deltas and Possible Martian Analogs

Volcanic Deltas and Possible Martian Analogs.

USGS
October 1, 2018

Planetary Geologic Mappers Handbook 2011

Planetary Geologic Mappers Handbook 2011.

USGS
October 22, 2018

Comparison between Interior Layered Deposits in Valles Marineris and..

Comparison between Interior Layered Deposits in Valles Marineris and Terrestrial Sub-ice Volcanoes.

Image: Grand Canyon

Grand Canyon

Sun making shadows at the Grand Canyon.

USGS
October 22, 2018

Comparison between Elysium Fossae Ridges and Terrestrial Sub-ice Volca

Comparison between Elysium Fossae Ridges and Terrestrial Sub-ice Volcanoes.

Image: Grand Canyon

Grand Canyon

Colorado River view.

Attribution: Water Resources
Filter Total Items: 188
USGS
March 18, 1997

Following the official dedication Friday morning, March 21, 1997, of the University of Arizona’s new Environment and Natural Resources Building, the public is invited to tour the facility on the campus at the northeast corner of Sixth Street and Park Avenue.

USGS
March 18, 1997

You no doubt are already aware of the March 21, 1997 dedication ceremony for the University of Arizona’s new Environmental and Natural Resources building at 520 North Park Avenue in Tucson. The building will be occupied by the U.S. Geological Survey, the U.S. Weather Service, and U of A students.

USGS
March 18, 1997

The presence of the U.S. Geological Survey in the University of Arizona’s Environment and Natural Resources Building marks the latest chapter in the USGS’s long association with the University and the study of earth sciences in Arizona.

USGS
November 21, 1996

The gasoline additive MTBE (methyl tert-butyl ether) was detected in some urban stormwater samples collected in 16 cities and metropolitan areas by the U.S. Geological Survey, but all detections of MTBE were less than the lower limit of the U.S. Environmental Protection Agency’s draft lifetime health advisory for drinking water.

USGS
March 25, 1996

About 2200 pounds of nontoxic red dye will be dumped into the Colorado River Wednesday (Mar. 27, 1996) as part of a controlled flood experiment in the Colorado River in the Grand Canyon, according to hydrologists at the U.S. Geological Survey.

USGS
March 22, 1996

Call the U.S. Geological Survey scientists listed below for information about the water science aspects of the controlled flood experiment in the Colorado River, Mar. 22-April 7, 1996. Mark Anderson is the key information scientist for the USGS on-site, and other scientists are working on-site and are available on a limited basis. Still others will be in the USGS office in Tucson throughout the ex

USGS
March 22, 1996

Follow the Colorado River Controlled Flood onthe World Wide Web
 

USGS
March 21, 1996

It’s spring and some people are busy cleaning house and rearranging the furniture.

Spring cleaning and rearranging of a different kind will take place in the Grand Canyon next week, as the Colorado River scours its bed and rearranges sandbars that have built up in the river’s winding channel.