Unified Interior Regions

Region 7: Upper Colorado Basin

Map of Region 7: Upper Colorado Basin

Map of Region 7:  Upper Colorado Basin

Map Showing USGS/DOI Unified Region 7 and parts of adjoining Regions

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USGS Science Centers in Region 7-Upper Colorado Basin produce hundreds of USGS-series publications, journal papers, and books each year that are subject to rigorous review by USGS specialists. The publications shown below on this page are related to study areas and staff members of USGS Science Centers in Region 7 compiled from the USGS Publications Warehouse.

Filter Total Items: 5,295
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Year Published: 2020

Hydrogeologic characterization, groundwater chemistry, and vulnerability assessment, Ute Mountain Ute Reservation, Colorado and Utah

The U.S. Geological Survey, in cooperation with the Ute Mountain Ute Tribe (UMUT), initiated a study in 2016 to increase understanding of the hydrogeology and chemistry of groundwater within select areas of the Ute Mountain Ute Reservation (UMUR) in Colorado and Utah, identify vulnerabilities to the system and other natural resources, and outline...

Bauch, Nancy J.; Arnold, L. Rick
Bauch, N.J., and Arnold, L.R., 2020, Hydrogeologic characterization, groundwater chemistry, and vulnerability assessment, Ute Mountain Ute Reservation, Colorado and Utah: U.S. Geological Survey Scientific Investigations Report 2019–5122, 76 p., https://doi.org/10.3133/sir20195122.

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Year Published: 2020

Seismicity of the Earth 1900–2018

This map illustrates 119 years of global seismicity in the context of global plate tectonics and the Earth’s physiography. Primarily designed for use by earth scientists, engineers, and educators, this map provides a comprehensive overview of strong (magnitude [M] 5.5 and larger) earthquakes since 1900. The map clearly identifies the locations of...

Hayes, Gavin P.; Smoczyk, Gregory M.; Villaseñor, Antonio H.; Furlong, Kevin P.; Benz, Harley M.
Hayes, G.P., Smoczyk, G.M., Villaseñor, A.H., Furlong, K.P., and Benz, H.M, 2020, Seismicity of the Earth 1900–2018: U.S. Geological Survey Scientific Investigations Map 3446, scale 1:22,500,000, https://doi.org/10.3133/sim3446. [Supersedes USGS Scientific Investigations Map 3064.]

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Year Published: 2020

Timing of Cenozoic extension in the southern Stillwater Range and Dixie Valley, Nevada

The Dixie Valley fault bounds the east side of the Stillwater Range in west‐central Nevada and last ruptured in 1954. Offset basalts indicate that slip began more recently than ~14 Ma, and prior work has interpreted the southern segment as an active low‐angle normal fault. Oligocene igneous rocks in the southern Stillwater Range were steeply...

Colgan, Joseph P.; Johnstone, Samuel A.; Shuster, David L.

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Year Published: 2020

Coexisting seismic behavior of transform faults revealed by high-resolution bathymetry

Transform faults are known to have anomalously low rates of seismicity, but no direct observations reveal why this is the case. We use new, autonomous underwater vehicle high-resolution seafloor mapping to image the morphology of and offsets along transform fault segments in the Gulf of California. Fault splays display a varied history of...

Hilley, George E.; Sare, Robert M.; Aron, Felipe; Baden, Curtis W; Caress, Dave; Castillo, Christopher M.; Dobbs, Stephen C; Gooley, Jared T; Johnstone, Samuel A.; Liu, Frances; McHargue, Tim; Nevitt, Josie M; Paull, Charles K.; Shumaker, Lauren E.; Traer, Miles M; Young, Holly H

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Year Published: 2020

Preferential elution of ionic solutes in melting snowpacks: Improving process understanding through field observations and modeling in the Rocky Mountains

The preferential elution of ions from melting snowpacks is a complex problem that has been linked to temporary acidification of water bodies. However, the understanding of these processes in snowpacks around the world, including the polar regions that are experiencing unprecedented warming and melting, remains limited despite being instrumental in...

Costa, Diogo; Sexstone, Graham A.; Pomeroy, J.W.; Campbell, Donald H.; Clow, David W.; Mast, Alisa

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Year Published: 2020

Earthquake magnitude and Lg Q variations between the Grenville and northern Appalachian geologic provinces of eastern Canada

This article assesses the ability of regionally specific, frequency‐dependent crustal attenuation (⁠1/Q">1/Q⁠) to reduce mean magnitude discrepancies between seismic stations in the northern Appalachian and Grenville provinces (NAP and GP) of Canada. LgQ(f)">Q(f) is an important parameter in ground‐motion models used in...

Perry, H.K. Claire; Bent, Allison L.; McNamara, Daniel E.; Crane, Stephen; Kolaj, Michal

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Year Published: 2020

Biomarker similarities between the saline lacustrine Eocene Green River and the Paleoproterozoic Barney Creek Formations

The Paleoproterozoic Barney Creek Formation, which is currently interpreted as a restricted, deep marine paleoenvironment, plays a disproportionate role in our understanding of Proterozoic ocean chemistry and the rise of complex life. The Barney Creek Formation hosts several unusual biomarker features, specifically its methylhopane and carotenoid...

French, Katherine L.; Birdwell, Justin E.; Vanden Berg, Michael

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Year Published: 2020

Persistence and plasticity in conifer water-use strategies

The selective use of seasonal precipitation by vegetation is critical to understanding the residence time and flow path of water in watersheds, yet there are limited datasets to test how climate alters these dynamics. Here, we use measurements of the seasonal cycle of tree ring 18O for two widespread conifer species in the Rocky Mountains of North...

Berkelhammer, Max ; Still, Chris ; Ritter, Francois ; Winnik, Matthew ; Anderson, Lesleigh; Carroll, Rosemary ; Carbone, Mariah ; Williams, Kenneth

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Year Published: 2020

Development of a global seismic risk model

Since 2015 the Global Earthquake Model (GEM) Foundation and its partners have been supporting regional programmes and bilateral collaborations to develop an open global earthquake risk model. These efforts led to the development of a repository of probabilistic seismic hazard models, a global exposure dataset comprising structural and occupancy...

Silva, Vitor; Amo-Oduro, Desmond; Calderon, Alejandro; Costa, Catarina; Dabbeek, Jamal; Despotaki, Venetia; Martins, Luis; Pagani, Marco; Rao, Anirudh; Simionato, Michele; Viganò, Daniele; Yepes-Estrada, Catalina; Acevedo, Ana Beatriz; Crowley, Helen; Horspool, Nick; Jaiswal, Kishor; Journeay, Murray; Pittore, Massimiliano

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Year Published: 2020

High-resolution mapping of the freshwater-brine interface using deterministic and Bayesian inversion of airborne electromagnetic data at Paradox Valley, USA

Salt loads in the Colorado River Basin are a primary water quality concern. Natural groundwater brine discharge to the Dolores River where it passes through the collapsed salt anticline of the Paradox Valley in western Colorado is a significant source of salt to the Colorado River. An airborne electromagnetic survey of Paradox Valley has...

Ball, Lyndsay B.; Bedrosian, Paul A.; Minsley, Burke J.

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Year Published: 2020

Progress in natural capital accounting for ecosystems

Reversing the ongoing degradation of the planet's ecosystems requires timely and detailed monitoring of ecosystem change and uses. Yet, the System of National Accounts (SNA), first developed in response to the economic crisis of the 1930s and used by statistical offices worldwide to record economic activity (for example, production, consumption,...

Hein, Lars; Bagstad, Kenneth J.; Obst, Carl; Edens, Bram; Schenau, Sjoerd; Castillo, Gem; Soulard, Francois; Brown, Claire; Driver, Amanda; Bordt, Michael; Steurer, Anton; Harris, Rocky; Capparros, Alejandro

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Year Published: 2020

A brief introduction to seismic instrumentation: Where does my data come from?

Modern seismology has been able to take advantage of several technological advances. These include feedback loops in the seismometer, specialized digitizers with absolute timing, and compression formats for storing data. While all of these advances have helped to improve the field, they can also leave newcomers a bit confused. Our goal here is...

Ringler, Adam T.; Bastien, Patrick

Photos and videos described and linked on this webpage come from a wide variety of USGS science activities and presentations performed by USGS Science Center staff members in the Region 7-Upper Colorado Basin.

Filter Total Items: 524
Well sampled to determine baseline pesticide concentrations in groundwater
May 11, 2009

Well sampled for baseline pesticide concentrations in groundwater

Well sampled to determine baseline pesticide concentrations in groundwater.

A hydrologist uses a meter to check groundwater parameters in a domestic supply well, with mountains in the background
April 21, 2009

Measuring water-quality parameters in a domestic-supply well

A hydrologic technician uses a meter to measure water-quality parameters, such as pH, dissolved oxygen, and specific conductance, in a domestic-supply well.

Moose on road to Lake Irene, Colorado
April 10, 2009

Moose on road to Lake Irene, Colorado

Moose on road to Lake Irene, Colorado

Snowpack-sampling pit near Fremont Pass, Colorado
April 6, 2009

Snowpack-sampling pit near Fremont Pass, Colorado

Snowpack-sampling pit near Fremont Pass, Colorado

Snow-density measurement in snowpack-sampling pit near Dunckley Pass, Colorado
April 3, 2009

Snow-density measurement near Dunckley Pass, Colorado

Snow-density measurement in snowpack-sampling pit near Dunckley Pass, Colorado

Snowpack-sampling pit near Dunckley Pass, Colorado
April 1, 2009

Snowpack-sampling pit near Dunckley Pass, Colorado

Snowpack-sampling pit near Dunckley Pass, Colo. Note discolored dust layers on left face (April 1, 2009).

Workers try to free snowmobile from deep snow near Buffalo Pass, CO
March 31, 2009

Workers try to free snowmobile from deep snow near Buffalo Pass, CO

Workers try to free snowmobile from deep snow near Buffalo Pass, CO

Typical, deep snowpack at sampling pit at Buffalo Pass, Colorado
March 31, 2009

Typical, deep snowpack at sampling pit at Buffalo Pass, Colorado

Typical, deep snowpack at sampling pit at Buffalo Pass, Colorado

National Atmospheric Deposition site near snowpack-sampling site at Brooklyn Lake, WY.
March 26, 2009

National Atmospheric Deposition site at Brooklyn Lake, WY

National Atmospheric Deposition site near snowpack-sampling site at Brooklyn Lake, WY.

Workers access site at Divide Peak, Wyoming via snowmobile.
March 25, 2009

Workers access site at Divide Peak, Wyoming via snowmobile.

Workers access site at Divide Peak, Wyoming via snowmobile.

Worker in snowpack-sampling pit at Old Battle, Wyoming
March 24, 2009

Worker in snowpack-sampling pit at Old Battle, Wyoming

Worker in snowpack-sampling pit at Old Battle, Wyoming

Worker prepares snowpack-sampling pit near Hopewell, New Mexico
March 20, 2009

Worker prepares snowpack-sampling pit near Hopewell, New Mexico

Worker prepares snowpack-sampling pit near Hopewell, New Mexico.

This page includes links to Social Media accounts (top of page), Science Centers (middle of page), and Regional Office staff members (bottom of page) of the USGS Region 7--Upper Colorado Basin.