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: 5,268
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Year Published: 2019

Benthic algal (Periphyton) growth rates in response to nitrogen and phosphorus: Parameter estimation for water quality models

Nitrogen (N) and phosphorus (P) are important pollutants that can stimulate nuisance blooms of algae. Water-quality models (e.g., WASP, CE-QUAL-R1, CE-QUAL-ICM, QUAL2k) are valuable and widely used management tools for algal accrual because of excess nutrients in the presence of other limiting factors. These models utilize the Monod and Droop...

Schmidt, Travis S.; Konrad, Christopher; Miller, Janet L.; Whitlock, Stephen D.; Stricker, Craig A.

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Year Published: 2019

Alaska Geochemical Database Version 3.0 (AGDB3)—Including “Best Value” Data Compilations for Rock, Sediment, Soil, Mineral, and Concentrate Sample Media

The Alaska Geochemical Database Version 3.0 (AGDB3) contains new geochemical data compilations in which each geologic material sample has one “best value” determination for each analyzed species, greatly improving speed and efficiency of use. Like the Alaska Geochemical Database Version 2.0 before it, the AGDB3 was created and designed to compile...

Granitto, Matthew; Wang, Bronwen; Shew, Nora B.; Karl, Susan M.; Labay, Keith A.; Werdon, Melanie B.; Seitz, Susan S.; Hoppe, John E.
Granitto, M., Wang, B., Shew, N.B., Karl, S.M., Labay, K.A., Werdon, M.B., Seitz, S.S., and Hoppe, J.E., 2019, Alaska Geochemical Database Version 3.0 (AGDB3)—Including “best value” data compilations for rock, sediment, soil, mineral, and concentrate sample media: U.S. Geological Survey Data Series 1117, 33 p., https://doi.org/10.3133/ds1117.

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Year Published: 2019

Multiproxy Cretaceous-Paleogene boundary event stratigraphy: An Umbria-Marche basin-wide perspective

The complete and well-studied pelagic carbonate successions from the Umbria-Marche Basin (Italy) permit the study of the event-rich stratigraphical interval around the Cretaceous-Paleogene (K-Pg) boundary (e.g., Deccan volcanism, boundary impact, Paleocene recovery and climate). To test the robustness of various proxy records (bulk carbonate δ13C...

Sinnesael, Matthias; Montanari, Alessandro; Frontalini, Fabrizio; Coccioni, Rodolfo; Gattacceca, Jerome; Snoeck, Christophe; Wegner, Wencke; Koeberl, Christian; Morgan, Leah E.; de Winter, Niels; DePaolo, Donald J.; Claeys, Philippe

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Year Published: 2019

PaCTS 1.0: A crowdsourced reporting standard for paleoclimate data

The progress of science is tied to the standardization of measurements, instruments, and data. This is especially true in the Big Data age, where analyzing large data volumes critically hinges on that data being standardized. Accordingly, the lack of community-sanctioned data standards in paleoclimatology has largely precluded the benefits of Big...

Kehrwald, Natalie M.; Khider, Deborah; Emile-Geay, Julien; McKay, Nicholas P.; Gili, Yolanda; Garijo, Daniel; Ratnakar, Varun; Brewer, Peter; Csank, Adam; Dassie, Emilie; Delong, Kristine; Felix, Thomas; Gray, William; Jonkers, Lucas; Kahle, Michael; Kaufman, Darrell S.; Richey, Julie N.; Schmittner, Andreas; Sutherland, Elaine Kennedy; Alonso-Garcia, Montserrat; Sebastian, Bertrand; Bothe, Oliver; Bunn, Andrew; Chevalier, Manuel; Francus, Pierre; Frappier, Amy; Goring, Simon; Martrat, Belen; McGregor, Helen V.; Allen, Kathryn J.; Arnaud, Fabien; Axford, Yarrow L.; Barrows, Timothy T.; Bazin, Lucie; Pilaar Birch, S.E.; Bradley, Elizabeth; Bregy, Joshua; Capron, Emilie; Cartapanis, Olivier; Chiang, Hong-Wei; Cobb, Kim; Debret, Maxime; Dommain, Rene; Du, Jianghui; Dyez, Kelsey; Emerick, Suellyn; Erb, Michael; Falster, Georgina; Finsinger, Walter; Fortier, Daniel; Gauthier, Nicolas; George, Steven; Grimm, Eric; Hertzberg, Jennifer; Hibbert, Fiona; Hillman, Aubrey; Hobbs, William; Huber, Matthew; Hughes, Anna L. C.; Jaccard, Samuel; Jiaoyang, Ruan; Kienast, Markus; Konecky, Bronwen; Le Roux, Gael; Lyubchich, Vyacheslav; Novello, Valdir; Olaka, Lydia; Partin, Judson W.; Pearce, Christof; Phipps, Steven J.; Pignol, Cecile; Pietrowska, Natalia; Poli, Maria-Serena; Prokopenko, Alexander; Schwanck, Franciele; Stepanek, Christian; Swann, George E. A.; Telford, Richard; Thomas, Elizabeth R.; Thomas, Zoe; Truebe, Sarah; von Gunten, Lucien; Waite, Amanda; Weitzel, Nils; Wilhelm, Bruno; Williams, John B.; Winstrup, Mai; Zhao, Ning; Zhou, Yuxin

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Year Published: 2019

Formation mechanisms of quartz veins in orogenic gold deposits: Insights from Grass Valley, California, USA

The orogenic gold veins of Grass Valley, California, USA, compose the historically richest lode gold district in the North American Cordillera. Petrographically, the veins exhibit a range of primary textural relationships allowing the reconstruction of the paragenetic sequence of mineral formation. Two generations of quartz are distinguished by...

Taylor, Ryan; Thomas Monecke; T. James Reynolds

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Year Published: 2019

Geochemistry of hematite veins in IOA-IOCG deposits of SE Missouri, USA: Relation to felsic magmatism and caldera lakes

The paragenesis, textures, and chemical compositions of secondary hematite in regional potassic altered rhyolites, four IOA deposits, the sedimentary iron deposit at Pilot Knob and the Boss IOCG deposit in SE Missouri were determined and compared to primary magnetite from the IOA and IOCG deposits. Magnetite is composed of elements characteristics...

Meighan, Corey J.; Hofstra, Albert H.; Marsh, Erin E.; Lowers, Heather A.; Koenig, Alan

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Year Published: 2019

Absence of magnetite microlites, geochemistry of magnetite veins and replacements in IOA deposits, SE Missouri, USA: Relations to intermediate intrusions

The paragenesis, textures, and chemical compositions of magnetite in two mafic to intermediate intrusions and four IOA deposits in SE Missouri were studied to discriminate between igneous and hydrothermal sources. In this study, we found that replacement magnetite with mineral inclusion-rich cores yields erroneously high Ti, Al, Si, Mg, and Mn...

Meighan, Corey J.; Hofstra, Albert H.; Adams, David; Marsh, Erin E.; Lowers, Heather A.; Koenig, Alan

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Year Published: 2019

Site response in the Oklahoma region from seismic recordings of the 2011 Mw 5.7 Prague earthquake

We invert the shear-wave displacement spectra obtained from 30 three-component, broadband waveforms recorded within 300 km of the 6 November 2011 Mw 5.7 Prague, Oklahoma earthquake to recover the site-response contribution using an inversion method that simultaneously inverts for source, path, and site effects. Site-response functions identify...

Mendoza, C.; Hartzell, Stephen H.

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Year Published: 2019

Surface rupture and distributed deformation revealed by optical satellite imagery: The intraplate 2016 Mw 6.0 Petermann Ranges earthquake, Australia

High-resolution optical satellite imagery is used to quantify vertical surface deformation associated with the intraplate 20 May 2016 Mw 6.0 Petermann Ranges earthquake, Northern Territory, Australia. The 21 ╓ 1 km long NW-trending rupture resulted from reverse motion on a northeast-dipping fault. Vertical surface offsets of up to 0.7 ╓ 0.1 m...

Gold, Ryan D.; Clark, Dan; Barnhart, William D.; King, Tamarah; Quigley, Mark; Briggs, Richard W.

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Year Published: 2019

Characterizing and imaging sedimentary strata using depth-converted spectral ratios: An example from the Atlantic Coastal Plain of the Eastern U.S.

Unconsolidated, near-surface sediments can have a profound influence on the amplitudes and frequencies of ground shaking during earthquakes, and these effects should be accounted for when using amplitude observations for seismic hazard assessments. This study explores methods to use teleseismic arrivals recorded on linear receiver arrays to...

Pratt, Thomas L.

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Year Published: 2019

Evaluating k-nearest neighbor (kNN) imputation models for species-level aboveground forest biomass mapping in northeast China

Quantifying spatially explicit or pixel-level aboveground forest biomass (AFB) across large regions is critical for measuring forest carbon sequestration capacity, assessing forest carbon balance, and revealing changes in the structure and function of forest ecosystems. When AFB is measured at the species level using widely available remote...

Fu, Yuanyuan; He, Hong S; Hawbaker, Todd J.; Henne, Paul D.; Zhu, Zhiliang; Larsen, David R.

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Year Published: 2019

Balancing sampling intensity against spatial coverage for a community science monitoring programme

Community science is an increasingly integral part of biodiversity research and monitoring, often achieving broad spatial and temporal coverage but lower sampling intensity than studies conducted by professional scientists. When designing a community‐science monitoring programme, careful assessment of sampling designs that could be both feasible...

Weiser, Emily L.; Diffendorfer, Jay E.; Grundel, Ralph; Lopez Hoffman, Laura ; Pecoraro, Samuel; Semmens, Darius J.; Thogmartin, Wayne E.

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.