Unified Interior Regions

Region 7: Upper Colorado Basin

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Filter Total Items: 4,695
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Year Published: 2018

Quantitative tools for implementing the new definition of significant portion of the range in the U.S. Endangered Species Act

In 2014, the Fish and Wildlife Service (FWS) and National Marine Fisheries Service announced a new policy interpretation for the U.S. Endangered Species Act (ESA). According to the act, a species must be listed as threatened or endangered if it is determined to be threatened or endangered in a significant portion of its range (SPR). The 2014...

Earl, Julia E.; Nicol, Samuel; Wiederholt, Ruscena; Diffendorfer, Jay E.; Semmens, Darius J.; Flockhart, D. T. Tyler; Mattsson, Brady; McCracken, Gary; Norris, D. Ryan; Thogmartin, Wayne E.; Lopez-Hoffman, Laura
Earl, J. E., Nicol, S., Wiederholt, R., Diffendorfer, J. E., Semmens, D., Flockhart, D. T. T., Mattsson, B. J., McCracken, G., Norris, D. R., Thogmartin, W. E. and López-Hoffman, L. (2017), Quantitative tools for implementing the new definition of significant portion of the range in the U.S. Endangered Species Act. Conservation Biology. doi:10.1111/cobi.12963

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Year Published: 2018

Increasing rock-avalanche size and mobility in Glacier Bay National Park and Preserve, Alaska detected from 1984 to 2016 Landsat imagery

In the USA, climate change is expected to have an adverse impact on slope stability in Alaska. However, to date, there has been limited work done in Alaska to assess if changes in slope stability are occurring. To address this issue, we used 30-m Landsat imagery acquired from 1984 to 2016 to establish an inventory of 24 rock avalanches in a 5000-...

Coe, Jeffrey A.; Bessette-Kirton, Erin; Geertsema, Marten

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Year Published: 2018

An empirical perspective for understanding climate change impacts in Switzerland

Planning for the future requires a detailed understanding of how climate change affects a wide range of systems at spatial scales that are relevant to humans. Understanding of climate change impacts can be gained from observational and reconstruction approaches and from numerical models that apply existing knowledge to climate change scenarios....

Henne, Paul D.; Bigalke, Moritz; Büntgen, Ulf; Colombaroli, Daniele; Conedera, Marco; Feller, Urs; Frank, David; Fuhrer, Jürg; Grosjean, Martin; Heiri, Oliver; Luterbacher, Jürg; Mestrot, Adrien; Rigling, Andreas; Rössler, Ole; Rohr, Christian; Rutishauser, This; Schwikowski, Margit; Stampfli, Andreas; Szidat, Sönke; Theurillat, Jean-Paul; Weingartner, Rolf; Wilcke, Wolfgan; Tinner, Willy

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Year Published: 2018

The influence of data characteristics on detecting wetland/stream surface-water connections in the Delmarva Peninsula, Maryland and Delaware

The dependence of downstream waters on upstream ecosystems necessitates an improved understanding of watershed-scale hydrological interactions including connections between wetlands and streams. An evaluation of such connections is challenging when, (1) accurate and complete datasets of wetland and stream locations are often not available and (2)...

Vanderhoof, Melanie K.; Distler, Hayley; Lang, Megan W.; Alexander, Laurie C.
17. Vanderhoof, M.K., Distler, H.E., Lang, M.W., Alexander, L.C. (2017) The influence of data quality on detecting wetland/stream surface water connections in the Delmarva Peninsula, Maryland and Delaware. influence of data characteristics on detecting wetland/stream, DOI:10.1007/s11273-017-9554-y.

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Year Published: 2017

Multiscale hyperspectral imaging of the Orange Hill Porphyry Copper Deposit, Alaska, USA, with laboratory-, field-, and aircraft-based imaging spectrometers

In the past decade, use of hyperspectral imaging (imaging spectroscopy) for mineral exploration and mining operations has been increasing at different spatial scales. In this paper, we focus on recent trends in applying imaging spectrometer data to: 1) airborne imaging of high latitude deposits, 2) field-based imaging of outcrops, and 3)...

Kokaly, Raymond; Graham, Garth E.; Hoefen, Todd M.; Kelley, Karen D.; Johnson, Michaela R.; Hubbard, Bernard E.; Buchhorn, M.; Prakash, A.

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Year Published: 2017

Improvements in absolute seismometer sensitivity calibration using local earth gravity measurements

The ability to determine both absolute and relative seismic amplitudes is fundamentally limited by the accuracy and precision with which scientists are able to calibrate seismometer sensitivities and characterize their response. Currently, across the Global Seismic Network (GSN), errors in midband sensitivity exceed 3% at the 95% confidence...

Anthony, Robert E.; Ringler, Adam T.; Wilson, David C.
Anthony, R.E., A.T. Ringler, D.C. Wilson (2017), Improvements in Absolute Seismometer Sensitivity Calibration using Local Earth Gravity Measurements, Bulletin of the Seismological Society of America, 108, 503-510. doi:10.1785/0120170218

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Year Published: 2017

Geologic map of the upper Arkansas River valley region, north-central Colorado

This 1:50,000-scale U.S. Geological Survey geologic map represents a compilation of the most recent geologic studies of the upper Arkansas River valley between Leadville and Salida, Colorado. The valley is structurally controlled by an extensional fault system that forms part of the prominent northern Rio Grande rift, an intra-continental region...

Kellogg, Karl S.; Shroba, Ralph R.; Ruleman, Chester A.; Bohannon, Robert G.; McIntosh, William C.; Premo, Wayne R.; Cosca, Michael A.; Moscati, Richard J.; Brandt, Theodore R.
Kellogg, K.S., Shroba, R.R., Ruleman, C.A., Bohannon, R.G., McIntosh, W. C., Premo, W.R., Cosca, M.A., Moscati, R.J., and Brandt, T.R., 2017, Geologic map of the upper Arkansas River valley region, north-central Colorado: U.S. Geological Survey Scientific Investigations Map 3382, pamphlet 70 p., 2 sheets, scale 1:50,000, https://doi.org/10.3133/sim3382.

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Year Published: 2017

Hydrogeologic characteristics and geospatial analysis of water-table changes in the alluvium of the lower Arkansas River Valley, southeastern Colorado, 2002, 2008, and 2015

The U.S. Geological Survey in cooperation with the Lower Arkansas Valley Water Conservancy District measures groundwater levels periodically in about 100 wells completed in the alluvial material of the Arkansas River Valley in Pueblo, Crowley, Otero, Bent, and Prowers Counties in southeastern Colorado, of which 95 are used for the analysis in this...

Holmberg, Michael J.
Holmberg, M.J., 2017, Hydrogeologic characteristics and geospatial analysis of water-table changes in the alluvium of the lower Arkansas River Valley, southeastern Colorado, 2002, 2008, and 2015: U.S. Geological Survey Scientific Investigations Map 3378, pamphlet 9 p., 3 sheets, scale 1:130,000 and 1:575, 000, https://doi.org/10.3133/sim3378.

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Year Published: 2017

Elemental, isotopic, and geochronological variability in Mogollon-Datil volcanic province archaeological obsidian, southwestern USA: Solving issues of intersource discrimination

Solving issues of intersource discrimination in archaeological obsidian is a recurring problem in geoarchaeological investigation, particularly since the number of known sources of archaeological obsidian worldwide has grown nearly exponentially in the last few decades, and the complexity of archaeological questions asked has grown equally so....

Shackley, M. Steven; Morgan, Leah E.; Pyle, Douglas

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Year Published: 2017

A general modeling framework for describing spatially structured population dynamics

Variation in movement across time and space fundamentally shapes the abundance and distribution of populations. Although a variety of approaches model structured population dynamics, they are limited to specific types of spatially structured populations and lack a unifying framework. Here, we propose a unified network-based framework sufficiently...

Sample, Christine; Fryxell, John; Bieri, Joanna A.; Federico, Paula; Earl, Julia; Wiederholt, Ruscena; Mattsson, Brady J.; Flockhart, Tyler; Nicol, Sam; Diffendorfer, James E.; Thogmartin, Wayne E.; Erickson, Richard A.; Norris, D. Ryan
Sample C, Fryxell J, Bieri J, et al. A general modeling framework for describing spatially structured population dynamics. Ecol Evol. 2017;00:1–16. https://doi.org/10.1002/ece3.3685

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Year Published: 2017

Operationalizing the telecoupling framework for migratory species using the spatial subsidies approach to examine ecosystem services provided by Mexican free-tailed bats

Drivers of environmental change in one location can have profound effects on ecosystem services and human well-being in distant locations, often across international borders. The telecoupling provides a conceptual framework for describing these interactions—for example, locations can be defined as sending areas (sources of flows of ecosystem...

Lopez Hoffman, Laura ; Diffendorfer, James E.; Widerholt, Ruscena ; Thogmartin, Wayne E.; McCraken, Gary; Medellin, Rodrigo; Bagstad, Kenneth J.; Russell, Amy; Semmens, Darius J.
López-Hoffman, L., J. Diffendorfer, R. Wiederholt, K. J. Bagstad, W. E. Thogmartin, G. McCracken, R. L. Medellin, A. Russell, and D. Semmens. 2017. Operationalizing the telecoupling framework for migratory species using the spatial subsidies approach to examine ecosystem services provided by Mexican free-tailed bats. Ecology and Society 22(4):23. https://doi.org/10.5751/ES-09589-220423

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Year Published: 2017

Amplification of earthquake ground motions in Washington, DC, and implications for hazard assessments in central and eastern North America

The extent of damage in Washington, DC, from the 2011 Mw 5.8 Mineral, VA, earthquake was surprising for an epicenter 130 km away; U.S. Geological Survey “Did-You-Feel-It” reports suggest that Atlantic Coastal Plain and other unconsolidated sediments amplified ground motions in the city. We measure this amplification relative to...

Pratt, Thomas L.; Horton, J. Wright; Munoz, Jessica; Hough, Susan E.; Chapman, Martin C.; Olgun, C. Guney
Pratt, T. L., Horton, J. W., Jr., Muñoz, J., Hough, S. E., Chapman, M. C., & Olgun, C. G. (2017). Amplification of earthquake ground motions in Washington, DC, and implications for hazard assessments in central and eastern North America. Geophysical Research Letters, 44, 12,150–12,160. https://doi.org/10.1002/2017GL075517

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: 594

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.