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

Regions L2 Landing Page Tabs

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: 5,333
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Year Published: 2020

Assessing mercury distribution using isotopic fractionation of mercury processes and sources adjacent and downstream of a legacy mine district in Tuscany, Italy

Mercury (Hg) concentrations and isotopic compositions in a range of sample types collected from the legacy Abbadia San Salvatore Mine (ASSM) area were used to evaluate the distribution of Hg in the region. The district generated more than 100,000 metric tons of Hg releasing extensive amounts of gaseous Hg emissions and producing large amounts of...

Pribil, Michael; Rimondi, Valentina; Costagliola, Pilario; Lattanzi, Pierfranco; Rutherford, Danny

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Year Published: 2020

Monazite and cassiterite Usingle bondPb dating of the Abu Dabbab rare-metal granite, Egypt: Late Cryogenian metalliferous granite magmatism in the Arabian-Nubian Shield

The Abu Dabbab rare-metal granite in the Eastern Desert of Egypt is a highly-evolved alkali-feldspar granite with transitional magmatic-hydrothermal features. Extreme geochemical fractionation and the associated significant TaSn resource make the Abu Dabbab intrusion an important feature in the metallogenic evolution of the Arabian-Nubian Shield....

Lehmann, Bernd; Zoheir, Basem; Neymark, Leonid A.; Zeh, Armin; Emam, Ashraf; Radwan, Abdelhady; Zhang, Rongqing; Moscati, Richard J.

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Year Published: 2020

Practical limitations of Earthquake Early Warning

Earthquake Early Earning (EEW) entails detection of initial earthquake shaking and rapid estimation and notification to users prior to imminent, stronger shaking. EEW is coming to the U.S. West Coast. But what are the technical and social challenges to delivering actionable information on earthquake shaking before it arrives? Although there will...

Wald, David J.

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Year Published: 2020

USGS “Did You Feel It?” — Science and lessons from twenty years of citizen science-based macroseismology

The U.S. Geological Survey (USGS) “Did You Feel It?” (DYFI) system is an automatic method for rapidly collecting macroseismic intensity data from Internet users’ shaking and damage reports and for generating intensity maps immediately following felt earthquakes. DYFI has been in operation for nearly two decades (1999-2019) in the United States,...

Quitoriano, Vince; Wald, David J.

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Year Published: 2020

Assessment of tight-gas resources in the Grand Erg/Ahnet Province of Algeria, 2019

Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 30.5 trillion cubic feet of tight gas in the Grand Erg/Ahnet Province of Algeria.

Brownfield, Michael E.; Schenk, Christopher J.; Mercier, Tracey J.; Tennyson, Marilyn E.; Woodall, Cheryl A.; Finn, Thomas M.; Le, Phuong A.; Pitman, Janet K.; Drake, Ronald M.; Gaswirth, Stephanie B.; Leathers-Miller, Heidi M.
Brownfield, M.E., Schenk, C.J., Mercier, T.J., Tennyson, M.E., Woodall, C.A., Finn, T.M., Le, P.A., Pitman, J.K., Drake, R.M., II, Gaswirth, S.B., and Leathers-Miller, H.M., 2020, Assessment of tight-gas resources in the Grand Erg/Ahnet Province of Algeria, 2019: U.S. Geological Survey Fact Sheet 2020–3003, 2 p., https://doi.org/10.3133/fs20203003.

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Year Published: 2020

How processing methodologies can distort and bias power spectral density estimates of seismic background noise

Power spectral density (PSD) estimates are widely used in seismological studies to characterize background noise conditions, assess instrument performance, and study quasi‐stationary signals that are difficult to observe in the time domain. However, these studies often utilize different processing techniques, each of which can inherently bias the...

Anthony, Robert E.; Ringler, Adam T.; Wilson, David C.; Bahavar, Manochehr; Koper, Keith D.

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Year Published: 2020

Testing ecosystem accounting in the United States: A case study for the Southeast

Ecosystem accounts, as formalized by the System of Environmental-Economic Accounting Experimental Ecosystem Accounts (SEEA EEA), have been compiled in a number of countries, yet there have been few attempts to develop them for the U.S. We explore the potential for U.S. ecosystem accounting by compiling ecosystem extent, condition, and ecosystem...

Warnell, Katie; Russell, Marc J.; Rhodes, Charles; Bagstad, Kenneth J.; Olander, Lydia P; Nowak, David J.; Poudel, Rajendra; Glynn, Pierre D.; Hass, Julie L.; Hiribayashi, Satoshi; Ingram, Jane Carter; Matuszak, John; Oleson, Kirsten L. L.; Posner, Stephen M.; Villa, Ferdinando

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Year Published: 2020

Assessing geohazards to the Denali National Park road with geologic mapping

Denali National Park (DENA) is home to iconic and breathtaking landscapes surrounding the tallest mountain range in North America, the Alaska Range. The park, which covers 6 million acres, is a major draw for tourism and recreation, making it an important economic engine for central Alaska. However, the geologic forces that created the beautiful,...

Hudson, Adam M.; Ruleman, Chester A.; Capps, Denny M
Hudson, A.M., Ruleman, C.A., Capps, D.M., 2020, Assessing geohazards to the Denali National Park Road with geologic mapping: U.S. Geological Survey Fact Sheet 2020–3016, 2 p., https://doi.org/10.3133/fs20203016.

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Year Published: 2020

Depth-dependent soil mixing persists across climate zones

Soil mixing over long (>102 y) timescales enhances nutrient fluxes that support soil ecology, contributes to dispersion of sediment and contaminated material, and modulates fluxes of carbon through Earth’s largest terrestrial carbon reservoir. Despite its foundational importance, we lack robust understanding of the rates and patterns of...

Gray, Harrison J.; Keen-Zebert, Amanda; Furbish, David; Tucker, Gregory E.; Mahan, Shannon A.

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Year Published: 2020

Runoff-initiated post-fire debris flow Western Cascades, Oregon

Wildfires dramatically alter the hydraulics and root reinforcement of soil on forested hillslopes, which can promote the generation of debris flows. In the Pacific Northwest, post-fire shallow landsliding has been well documented and studied, but the potential role of runoff-initiated debris flows is not well understood and only one previous to...

Wall, Sara; Roering, J.J.; Rengers, Francis K.

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Year Published: 2020

Learning from real-world experience to understand renewable energy impacts to wildlife

The project team sought to use real-world data to understand adverse effects to wildlife of renewable energy production that is critical to meeting California’s climate and clean energy goals. The project had three main components. First, a systematic literature review studied 20 peer-reviewed publications and 612 reports from other nonreviewed...

Conkling, Tara J; Vander Zanden, Hannah B.; Poessel, Sharon; Loss, Scott R.; Allison, Taber D; Diffendorfer, James E.; Duerr, Adam E.; Nelson, David M.; Yee, Julie L; Katzner, Todd E.

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Year Published: 2020

NGWA Groundwater Modeling Advisory Panel Survey on the Use of Uncertainty Analysis in Groundwater Modeling

This white paper provides the results of a survey by members of the NGWA Groundwater Modeling Advisory Panel to assess the use of uncertainty analysis in groundwater modeling.The objective of the survey was to improve understanding of the use of uncertainty analysis in practical groundwater modeling projects subject to real-world constraints, such...

Luis, Steve; Schulmeyer, Pete; Bean, David; Newman, Connor P.; Puddephatt, Dan; Sheets, Rodney A.; Hunt, Randall J.

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: 525
Invasive brown treesnake
November 12, 2010

Invasive brown treesnake

Brown treesnakes were a major contributor to the loss of nine of 11 native forest birds on Guam.

Image: Ranchlands, Utah and Idaho
September 13, 2010

Ranchlands, Utah and Idaho

Roadsides, ranchlands, and mountains.

Image: Ranchlands, Utah and Idaho
September 13, 2010

Ranchlands, Utah and Idaho

Roadsides, ranchlands, and mountains.

A rainstorm in the Colorado mountains
July 27, 2010

Rainstorms can be localized or widespread.

A localized heavy summer rainstorm in Colorado.

Here is a classic rainstorm during the summer, as that is when more localized storms occur. Other rain events are more "frontal" in nature, with large formations of featureless and uniform nimbostratus types of clouds bringing precipitation over a large area. But often you see a landscape similar to

...
Preparing sample for macroinvertebrate analysis
April 29, 2010

Preparing sample for macroinvertebrate analysis

Preparing sample for macroinvertebrate analysis

This photo of a Pacific sheath-tailed bat is the last good photo of this bat from Aguiguan in existence.
December 31, 2009

The last sheath-tailed bat photo

This photo of a Pacific sheath-tailed bat is the last good photo of this bat from Aguiguan in existence.

Coyote on trail to Canyon, Wyoming
November 30, 2009

Coyote on trail to Canyon, Wyoming

Coyote on trail to Canyon, Wyoming

Parking area for worker's snowmobiles near Deadman Pass, Colorado
November 30, 2009

Parking area for worker's snowmobiles near Deadman Pass, Colorado

Parking area for worker's snowmobiles near Deadman Pass, Colo

Measuring water level in streambank piezometer nr Wind River at Kinnear
November 24, 2009

Measuring water level in streambank piezometer nr Wind Riv at Kinnear

Measuring water level in streambank piezometer nr Wind River at Kinnear

Snowpack-sampling pit at Berthoud Pass, Colorado.
November 10, 2009

Snowpack-sampling pit at Berthoud Pass, Colorado

Snowpack-sampling pit at Berthoud Pass, Colo.

Steep alpine terrain above snowpack-sampling site at Big Mountain, MT
November 6, 2009

Steep alpine terrain above snowpack-sampling site at Big Mountain, MT

Steep alpine terrain above snowpack-sampling site at Big Mountain, MT.

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.