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Region 7: Upper Colorado Basin

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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: 4,849
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Year Published: 2018

Reverse weathering in marine sediments and the geochemical cycle of potassium in seawater: Insights from the K isotopic composition (41K/39K) of deep-sea pore-fluids

In situ Al-silicate formation, also known as “reverse weathering,” is an important sink of many of the major and minor cations in seawater (e.g. Mg, K, and Li). However, the importance of this sink in global geochemical cycles and isotopic budgets of these elements remains poorly constrained. Here, we report on the potassium isotopic...

Santiago Ramos, Danielle P.; Morgan, Leah E.; Lloyd, Nicholas S.; Higgins, John A.
Ramos, Danielle P. Santiago, et al. "Reverse weathering in marine sediments and the geochemical cycle of potassium in seawater: Insights from the K isotopic composition (41K/39K) of deep-sea pore-fluids." Geochimica et Cosmochimica Acta (2018).

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Year Published: 2018

Ensemble smoothed seismicity models for the new Italian Probabilistic Seismic Hazard Map

We develop a long‐term (a few decades or longer) earthquake rate forecast for Italy based on smoothed seismicity for incorporation in the 2017–2018 Italian Probabilistic Seismic Hazard Maps (IPSHM). Because the earthquake rate models from previous IPSHM were computed using source zones that were drawn around seismicity and tectonic provinces, the...

Akinci, Aybige; Moschetti, Morgan P.; Taroni, Matteo
Akinci, A., Moschetti, M. P., & Taroni, M. (2018). Ensemble smoothed seismicity models for the new Italian probabilistic seismic hazard map. Seismological Research Letters. doi:10.1785/0220180040

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Year Published: 2018

Streamflow and selenium loads during synoptic sampling of the Gunnison River and its tributaries near Delta, Colorado, November 2015

In response to the need for more information about selenium (Se) sources and transport, the U.S. Geological Survey, in cooperation with the Colorado Water Conservation Board, completed a study that characterized Se loads in a reach of the Gunnison River between Delta and Grand Junction, Colo. This report identifies where possible dissolved Se...

Stevens, Michael R.; Leib, Kenneth J.; Thomas, Judith C.; Bauch, Nancy J.; Richards, Rodney J.
Stevens, M.R., Leib, K.J., Thomas, J.C., Bauch, N.J., and Richards, R.J., 2018, Streamflow and selenium loads during synoptic sampling of the Gunnison River and its tributaries near Delta, Colorado, November 2015: U.S. GeologicalSurvey Scientific Investigations Report 2018–5029, 17 p., https://doi.org/10.3133/sir20185029.

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Year Published: 2018

Geologic map of the Fort Morgan 7.5' quadrangle, Morgan County, Colorado

The Fort Morgan 7.5′ quadrangle is located on the semiarid plains of northeastern Colorado, along the South Platte River corridor where the river has incised into Upper Cretaceous Pierre Shale. The Pierre Shale is largely covered by surficial deposits that formed from alluvial, eolian, and hillslope processes operating in concert with...

Berry, Margaret E.; Taylor, Emily M.; Slate, Janet L.; Paces, James B.; Hanson, Paul R.; Brandt, Theodore R.
Berry, M.E., Taylor, E.M., Slate, J.L., Paces, J.B., Hanson, P.R., and Brandt, T.R., 2018, Geologic map of the Fort Morgan 7.5' quadrangle, Morgan County, Colorado: U.S. Geological Survey Scientific Investigations Map 3408, 2 sheets, scale 1:24,000, https://doi.org/10.3133/sim3408.

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Year Published: 2018

On the feasibility of real-time mapping of the geoelectric field across North America

A review is given of the present feasibility for accurately mapping geoelectric fields across North America in near-realtime by modeling geomagnetic monitoring and magnetotelluric survey data. Should this capability be successfully developed, it could inform utility companies of magnetic-storm interference on electric-power-grid systems. That real...

Love, Jeffrey J.; Rigler, E. Joshua; Kelbert, Anna; Finn, Carol A.; Bedrosian, Paul A.; Balch, Christopher C.
Love, J.J., Rigler, E.J., Kelbert, Anna, Finn, C.A., Bedrosian, P.A., and Balch, C.C., 2018, On the feasibility of real-time mapping of the geoelectric field across North America: U.S. Geological Survey Open-File Report 2018-1043, 16 p., https://doi.org/10.3133/ofr20181043.

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Year Published: 2018

Multiple stacked plays to drive continued Permian development

The exploitation of unconventional (continuous) resource plays with horizontal drilling and fracturing techniques continues to spur renewed development in mature producing basins in the US. The Permian basin of west Texas has emerged as a particularly strong prospect due to the potential for multiple stacked resource plays in formations such as...

Marra, Kristen R.; Gaswirth, Stephanie B.

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Year Published: 2018

Long-term effects of fire and harvest on carbon stocks of boreal forests in northeastern China

ContextBoreal forests represent about one third of forest area and one third of forest carbon stocks on the Earth. Carbon stocks of boreal forests are sensitive to climate change, natural disturbances, and human activities.AimsThe objectives of this study were to evaluate the effects of fire, harvest, and their spatial interactions on boreal...

Huang, Chao; He, Hong S.; Liang, Yu; Wu, Zhiwei; Hawbaker, Todd J.; Gong, Peng; Zhu, Zhiliang

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Year Published: 2018

Quantifying ecosystem service flows at multiple scales across the range of a long-distance migratory species

Migratory species provide ecosystem goods and services throughout their annual cycles, often over long distances. Designing effective conservation solutions for migratory species requires knowledge of both species ecology and the socioeconomic context of their migrations. We present a framework built around the concept that migratory species act...

Semmens, Darius J.; Diffendorfer, James E.; Bagstad, Kenneth J.; Wiederholt, Ruscena; Oberhauser, Karen; Ries, Leslie; Semmens, Brice X.; Goldstein, Joshua; Loomis, John B.; Thogmartin, Wayne E.; Mattsson, Brady J.; Lopez-Hoffman, Laura

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Year Published: 2018

Processes and facies relationships in a Lower(?) Devonian rocky shoreline depositional environment, East Lime Creek Conglomerate, south‐western Colorado, USA

Rocky shorelines are relatively common features along modern coastlines, but few have been recognized in the geological record. The hard substrates of rocky shorelines telescope the width of offshore marine environments, thus the diagnostic deposits observed in such settings today have a low preservation potential due to small accommodation space...

Evans, James E.; Holm-Denoma, Christopher S.

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Year Published: 2018

40Ar/39Ar geochronology and petrogenesis of the Table Mountain Shoshonite, Golden, Colorado, U.S.A.

The Upper Cretaceous and Lower Paleogene Table Mountain Shoshonite lava flows and their proposed source, the Ralston Buttes intrusions, provide insight into the volcanic history of the Colorado Front Range. This study affirms the long-held hypothesis linking the extrusive Table Mountain lava flows and their intrusive equivalents at Ralston Buttes...

Millikin, Alexie E. G.; Morgan, Leah E.; Noblett, Jeffery
Alexie E. G. Millikin, Leah E. Morgan, Jeffrey Noblett; 40Ar/39Ar geochronology and petrogenesis of the Table Mountain Shoshonite, Golden, Colorado, U.S.A.. Rocky Mountain Geology ; 53 (1): 1–28. doi: https://doi.org/10.24872/rmgjournal.53.1.1

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Year Published: 2018

Paleozoic shale gas resources in the Sichuan Basin, China

The Sichuan Basin, China, is commonly considered to contain the world’s most abundant shale gas resources. Although its Paleozoic marine shales share many basic characteristics with successful United States gas shales, numerous geologic uncertainties exist, and Sichuan Basin shale gas production is nascent. Gas retention was likely compromised by...

Potter, Christopher J.

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Year Published: 2018

Assessment of undiscovered oil and gas resources in the Canning Basin Province, Australia, 2017

Using a geology-based assessment methodology, the U.S. Geological Survey estimated mean undiscovered, technically recoverable resources of 1.3 billion barrels of oil and 34.4 trillion cubic feet of gas in the Canning Basin Province of Australia.

Schenk, Christopher J.; Tennyson, Marilyn E.; Mercier, Tracey J.; Woodall, Cheryl A.; Finn, Thomas M.; Le, Phuong A.; Brownfield, Michael E.; Gaswirth, Stephanie B.; Marra, Kristen R.; Leathers-Miller, Heidi M.
Schenk, C.J., Tennyson, M.E., Mercier, T.J., Woodall, C.A., Finn, T.M., Le, P.A., Brownfield, M.E., Gaswirth, S.B., Marra, K.R., and Leathers-Miller, H.M., 2018, Assessment of undiscovered oil and gas resources in the Canning Basin Province, Australia, 2017: U.S. Geological Survey Fact Sheet 2018–3023, 4 p., https://doi.org/10.3133/fs20183023.

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.