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: 5,207
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Year Published: 2019

A 20-year record of water chemistry in an alpine setting, Mount Emmons, Colorado, USA

From 1997 to the present, the U.S. Geological Survey and other agencies have been collecting water samples for chemical analyses on Mount Emmons in central Colorado, USA. The geology of Mount Emmons is dominated by Upper Cretaceous to Paleogene sediments of marine to continental origin, with felsic intrusive rocks interrupting the sedimentary...

Wanty, Richard; Manning, Andrew H.; Johnson, Michaela; Verplanck, Philip

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Year Published: 2019

Viable long-term gas hydrate testing site confirmed on the Alaska north slope

In December 2018, data acquired in a Stratigraphic Test Well drilled from the 7-11-12 pad in the western part of the Prudhoe Bay Unit, Alaska North Slope confirmed the occurrence of two high-quality reservoirs fully saturated with gas hydrate. The drilling was the initial phase of a planned, three-well program designed to conduct an extended...

Ray Boswell; Marsteller, Scott; Nori Okinaka; Wakatsuki, Motoi; Collett, Timothy S.; Robert Hunter; Tom Walsh; David Itter; Stephen Crumley

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Year Published: 2019

Geological and geophysical data for a three-dimensional view—Inside the San Juan and Silverton Calderas, Southern Rocky Mountains Volcanic Field, Silverton, Colorado

IntroductionThe San Juan-Silverton caldera complex located near Silverton, Colorado, in the Southern Rocky Mountains volcanic field is an ideal natural laboratory for furthering the understanding of shallow-to-deep volcanic-related mineral systems. Recent advances in geophysical data processing and three-dimensional (3D) model construction will...

Yager, Douglas B.; Anderson, Eric D.; Deszcz-Pan, Maria; Rodriguez, Brian D.; Smith, Bruce D.
Yager, D.B., Anderson, E.D., Rodriguez, B.D., Deszcz-Pan, M., and Smith, B.D., 2019, Geological and geophysical data for a three-dimensional view—Inside the San Juan and Silverton calderas, Southern Rocky Mountains volcanic field, Silverton, Colorado: U.S. Geological Survey Fact Sheet 2019-3026, 4 p., https://doi.org/10.3133/fs20193026.

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Year Published: 2019

A physical model of the high-frequency seismic signal generated by debris flows

We propose a physical model for the high‐frequency (>1 Hz) spectral distribution of seismic power generated by debris flows. The modeled debris flow is assumed to have four regions where the impact rate and impulses are controlled by different mechanisms: the flow body, a coarser‐grained snout, a snout lip where particles fall from the snout on...

Farin, Maxime; Tsai, Victor C.; Lamb, Michael P.; Allstadt, Kate

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Year Published: 2019

Petrology of volcanic rocks associated with silver-gold (Ag-Au) epithermal deposits in the Tonopah, Divide, and Goldfield Mining Districts, Nevada

Miocene calc-alkaline volcanic rocks, part of the southern segment of the ancestral Cascades magmatic arc, are spatially, temporally, and likely genetically associated with precious metal epithermal deposits in the Tonopah, Divide, and Goldfield Districts of west-central Nevada. In the Tonopah mining district, volcanic rocks include the Mizpah...

du Bray, Edward A.; John, David A.; Colgan, Joseph P.; Vikre, Peter G.; Cosca, Michael A.; Morgan, Leah E.
du Bray, E.A., John, D.A., Colgan, J.P., Vikre, P.G., Cosca, M.A., and Morgan, L.E., 2019, Petrology of volcanic rocks associated with silver-gold (Ag-Au) epithermal deposits in the Tonopah, Divide, and Goldfield mining districts, Nevada: U.S. Geological Survey Scientific Investigations Report 2019–5024, 22 p., https://doi.gov/10.3133/sir20195024.

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Year Published: 2019

Variability of estimated ultimate recovery in shale oil and shale gas accumulations in the U.S.

Variability of mean EURs within and between unconventional reservoirs is becoming more apparent as thousands of wells are drilled and oil and gas is produced from unconventional low-permeability reservoirs. Production from many of these reservoirs shows that there is spatial heterogeneity of EURs, which is mainly related to geologic...

Schenk, Christopher J.; Leathers-Miller, Heidi M.

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Year Published: 2019

Constraining parameter uncertainty in modeling debris-flow initiation during the September 2013 Colorado Front Range storm

The occurrence of debris flows during the September 2013 northern Colorado floods took the emergency management community by surprise. The September 2013 debris flows in the Colorado Front Range initiated from shallow landslides in colluvium. Most occurred on south- and east-facing slopes on the walls of steep canyons in crystalline rocks and on...

Baum, Rex L.; Scheevel, C.R.; Jones, Eric S.

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Year Published: 2019

Bayesian analysis of the impact of rainfall data product on simulated slope failure for North Carolina locations

In the past decades, many different approaches have been developed in the literature to quantify the load-carrying capacity and geotechnical stability (or the Factor of Safety, F_s) of variably saturated hillslopes. Much of this work has focused on a deterministic characterization of hillslope stability. Yet, simulated F_s values are subject to...

Yatheendradas, Soni; Kirschbaum, Dalia; Nearing, Grey; Vrugt, Jasper A.; Baum, Rex L.; Wooten, Rick; Lu, Ning; Godt, Jonathan W.
Yatheendradas, S., Kirschbaum, D., Nearing, G., Vrugt, J.A., Baum, R.L., Wooten, Rick, Lu, Ning, Godt, J.W., 2019, Bayesian analysis of the impact of rainfall data product on simulated slope failure for North Carolina locations: Computational Geosciences, v. 23, no. 3, p. 495–522. https://doi.org/10.1007/s10596-018-9804-y

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Year Published: 2019

Earthquake-induced chains of geologic hazards: Patterns, mechanisms, and impacts

Large earthquakes initiate chains of surface processes that last much longer than the brief moments of strong shaking. Most moderate- and large-magnitude earthquakes trigger landslides, ranging from small failures in the soil cover to massive, devastating rock avalanches. Some landslides dam rivers and impound lakes, which can collapse days to...

Fan, Xuanmei; Scaringi, Gianvito; Korup, Oliver; West, A. Joshua; Westen, Cees J. van; Tanyas, Hakan; Hovius, Niels; Hales, Tristram C; Jibson, Randall W.; Allstadt, Kate E.; Zhang, Limin; Evans, Stephen G.; Xu, Chong; Li, Gen; Pei, Xiangjun; Xu, Qiang; Huang, Runqiu
Fan, X., Scaringi, G. Korup, O., West, A.J., van Westen, C.J., Tanyaş, H., Hovius, N., Hales, T.C., Jibson, R.W., Allstadt, K.E., Zhang, L., Evans, S.G., Xu, C., Li, G., Pei, X., Xu, Q., Huang, R., 2019, Earthquake-induced chains of geologic hazards—Patterns, mechanisms, and impacts: Reviews of Geophysics, v. 57, p. 421-503

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Year Published: 2019

Late Quaternary vegetation development following deglaciation of northwestern Alexander Archipelago, Alaska

The Cordilleran Ice sheet covered most of southeastern Alaska during the Last Glacial Interval (LGI: Marine Isotope Stage 2). Ice began to recede from western Alexander Archipelago ~17,000 + 700 yr BP. In this study pollen analysis and radiocarbon dating of three sediment cores were used to reconstruct, for the first time, the postglacial...

Thomas A. Ager
Ager, T. (2019). Late Quaternary vegetation development following deglaciation of northwestern Alexander Archipelago, Alaska

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Year Published: 2019

Guidance for assessing interregional ecoystem service flows

Ecosystem services (ES) assessments commonly focus on a specific biophysical region or nation and take its geographic borders as the system boundary. Most geographical regions are, however, not closed systems but are open and telecoupled with other regions through ES imports and exports, which are mediated by fluxes of matter, energy and...

Koellner, Thomas; Bonn, Aletta; Arnhold, Sebastian; Bagstad, Kenneth J.; Friedman, Dor; Guerra, Carlos; Kastner, Thomas; Kissinger, Meidad; Kleeman, Janina; Kuhlicke, Christian; Liu, Jianguo; Lopez-Hoffman, Laura; Marques, Alexandra; Martin-Lopez, Berta; Schulp, Catharina J. E.; Wolff, Sarah; Schröter, Matthias

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.