Unified Interior Regions

Region 7: Upper Colorado Basin

Map of Region 7 Upper Colorado River Basin

Map of Region 7 Upper Colorado River 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: 5,060
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Year Published: 2019

Bioavailable iron production in airborne mineral dust: Controls by chemical composition and solar flux

A large part of oceanic biological production is limited by the scarcity of dissolved iron. Mineral dust aerosol, processed under acidic atmospheric conditions, is the primary natural source of bioavailable iron to oceanic life. However, synergistic and antagonistic effects of non-Fe-containing minerals on atmospheric...

Hettiarachchi, Eshani; Reynolds, Richard L.; Goldstein, Harland L.; Moskowitz, Bruce M.; Rubasinghege, Gayan

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Year Published: 2019

Groundwater Conditions in Utah, Spring of 2018

This is the fifty-fifth in a series of annual reports that describe groundwater conditions in Utah. Reports in this series, published cooperatively by the U.S. Geological Survey and the Utah Department of Natural Resources, Division of Water Rights, and the Utah Department of Environmental Quality, Division of Water...

Smith, Lincoln; Birken, Adam S.; Klebba, Phillip H.; Jones, Katherine K.; Derrick, V. Noah ; Downhour, Paul; Eacret, Robert J.; Gibson, Travis L.; Slaugh, Bradley A.; Whittier, Nickolas R.; Douglas, Brandon P.; LaBonte, Douglas V.; Fisher, Martel J.

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Year Published: 2019

Factors controlling landslide frequency-area distributions

A power‐law relation for the frequency–area distribution (FAD) of medium and large landslides (e.g. tens to millions of square meters) has been observed by numerous authors. But the FAD of small landslides diverges from the power‐law distribution, with a rollover point below which frequencies decrease for smaller landslides. Some studies conclude...

Tanyaş, Hakan; van Westen, Cees J.; Allstadt, Kate E.; Jibson, Randall W.

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Year Published: 2019

Mammut pacificus sp. nov., a newly recognized species of mastodon from the Pleistocene of western North America

A new species of mastodon from the Pleistocene of western North America, Mammut pacificus sp. nov. is herein recognized, with specimens identified throughout California and from two localities in southern Idaho. This new taxon differs from the contemporaneous M. americanum in having narrower teeth, most prominently in M3/m3, as...

Dooley Jr., Alton C; Scott, Eric; Green, Jeremy; Springer, Kathleen B.; Dooley, Brett; Smith, Gregory J.

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Year Published: 2019

North-south dipole in winter hydroclimate in the western United States during the last deglaciation

During the termination of the last glacial period the western U.S. experienced exceptionally wet conditions, driven by changes in location and strength of the mid-latitude winter storm track. The distribution of modern winter precipitation is frequently characterized by a north-south wet/dry dipole pattern, controlled by interaction of the storm...

Hudson, Adam M.; Hatchett, Benjamin J.; Quade, Jay; Boyle, Douglas P.; Bassett, Scott D.; Ali, Guleed; De los Santos, Marie G.

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Year Published: 2019

Evidence for non-steady-state carbon emissions from snow-scoured alpine tundra

High-latitude warming is capable of accelerating permafrost degradation and the decomposition of previously frozen carbon. The existence of an analogous high-altitude feedback, however, has yet to be directly evaluated. We address this knowledge gap by coupling a radiocarbon-based model to 7 years (2008–2014) of continuous eddy covariance data...

Knowles, John F.; Blanken, Peter D. ; Lawrence, Corey; Williams, Mark W.

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Year Published: 2019

A supervolcano and its sidekicks: A 100 ka eruptive chronology of the Fish Canyon Tuff and associated units of the La Garita magmatic system

Establishing temporal constrains on major volcanic eruptions is limited by the precision of existing geochronometers. Prior work on the La Garita caldera, created by the eruption of the Fish Canyon Tuff, failed to resolve temporal differences between pre-, syn-, and post-collapse eruptive units. Here, we report 40Ar/39Ar geochronologic data...

Morgan, Leah E.; Johnstone, Samuel A.; Gilmer, Amy K.; Cosca, Michael A.; Thompson, Ren A.
Morgan, L. E., Johnstone, S. A., Gilmer, A. K., Cosca, M. A., & Thompson, R. A. (2019). A supervolcano and its sidekicks: A 100 ka eruptive chronology of the Fish Canyon Tuff and associated units of the La Garita magmatic system, Colorado, USA. Geology, 47(5), 453-456.

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Year Published: 2019

Characteristics and spatial variability of wind noise on near-surface broadband seismometers

By coupling with the ground, wind causes ground motion that appears on seismic records as noise across a wide bandwidth. This wind-generated noise can drown out important features such as small earthquakes and prevent observation of normal modes from large earthquakes. Because the wind field is heterogeneous at local scales due to structures,...

Dybing, S. N.; Ringler, Adam T.; Wilson, David C.; Anthony, Robert E.

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Year Published: 2019

Imaging spectroscopy for the detection, assessment and monitoring of natural and anthropogenic hazards

Natural and anthropogenic hazards have the potential to impact all aspects of society including its economy and the environment. Diagnostic data to inform decision-making are critical for hazard management whether for emergency response, routine monitoring or assessments of potential risks. Imaging spectroscopy (IS) has unique contributions to...

Ong, Cindy; Carrere, Véronique; Chabrillat, Sabine; Clark, Roger N.; Hoefen, Todd M.; Kokaly, Raymond; Marion, Rodolphe; Souza Filho, Carlos Roberto de; Swayze, Gregg A.; Thompson, David R.

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Year Published: 2019

Geomorphic survey of North Fork Eagle Creek, New Mexico, 2017

About one-quarter of the water supply for the Village of Ruidoso, New Mexico, is derived from groundwater pumping along North Fork Eagle Creek in the Eagle Creek Basin near Alto, New Mexico. Because of concerns regarding the effects of groundwater pumping on surface-water hydrology in the Eagle Creek Basin and the effects of the 2012 Little Bear...

Graziano, Alexander P.
Graziano, A.P., 2019, Geomorphic survey of North Fork Eagle Creek, New Mexico, 2017: U.S. Geological Survey Open-File Report 2018–1187, 28 p., https://doi.org/10.3133/ofr20181187.

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Year Published: 2019

Effect of size-biased sampling on resource predictions from the three-part method for quantitative mineral resource assessment—A case study of the gold mines in the Timmins-Kirkland Lake area of the Abitibi greenstone belt, Canada:

The three-part method for quantitative mineral resource assessment is used by the U.S. Geological Survey to predict, within a specified assessment area, the number of undiscovered mineral deposits and the quantity of mineral resources in those undiscovered deposits. The effects of size-biased sampling on such predictions are evaluated in a case...

Ellefsen, Karl J.
Ellefsen, K.J., 2019, Effect of size-biased sampling on resource predictions from the three-part method for quantita-tive mineral resource assessment—A case study of the gold mines in the Timmins-Kirkland Lake area of the Abitibi greenstone belt, Canada: U.S. Geological Scientific Investigations Report 2018–5149, 15 p., https://doi.org/10.3133/sir20185149.

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Year Published: 2019

Improved enrichment factor calculations through principal component analysis: Examples from soils near breccia pipe uranium mines, Arizona, USA

The enrichment factor (EF) is a widely used metric for determining how much the presence of an element in a sampling media has increased relative to average natural abundance because of human activity. Calculation of an EF requires the selection of both a background composition and a reference element, choices that can strongly influence the...

Bern, Carleton R.; Walton-Day, Katie; Naftz, David L.

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: 520
Plots of realtime Meteorological conditions at Devil's Thumb site, Colorado

Devil's Thumb Meteorologic site

Realtime snow weather conditions (temperature, relative humidity, wind speed, snow depth) at Devil's Thumb meteorological site in Colorado.
 

Pecos River Webcam Near Roswell, NM, Site #334716104175400

Pecos River Webcam Near Roswell, NM

Webcam image of the Pecos River near Roswell, New Mexico - Site #334716104175400

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.