Publications
Filter Total Items: 1471
Cosmogenic nuclide and uranium-series dating of old, high shorelines in the western Great Basin, USA Cosmogenic nuclide and uranium-series dating of old, high shorelines in the western Great Basin, USA
Closed-basin pluvial lakes are sensitive recorders of effective moisture, and they provide a terrestrial signal of climate change that can be compared to marine and ice records of glacial-interglacial cycles. Although the most recent deep-lake cycle in the western Great Basin (at ca. 16 ka) has been studied intensively, comparatively little is known about the longer-term Quaternary...
Authors
G. Kurth, F. M. Phillips, Marith C. Reheis, J.L. Redwine, James B. Paces
Scattered P'P' waves observed at short distances Scattered P'P' waves observed at short distances
We detect previously unreported 1 Hz scattered waves at epicentral distances between 30° and 50° and at times between 2300 and 2450 s after the earthquake origin. These waves likely result from off-azimuth scattering of PKPbc to PKPbc in the upper mantle and crust and provide a new tool for mapping variations in fine-scale (10 km) mantle heterogeneity. Array beams from the Large Aperture...
Authors
Paul S. Earle, Sebastian Rost, Peter M. Shearer, Christine Thomas
Late Pliocene and Quaternary Eurasian locust infestations in the Canary Archipelago Late Pliocene and Quaternary Eurasian locust infestations in the Canary Archipelago
The Canary Archipelago has long been a sensitive location to record climate changes of the past. Interbedded with its basalt lavas are marine deposits from the principal Pleistocene interglacials, as well as aeolian sands with intercalated palaeosols. The palaeosols contain African dust and innumerable relict egg pods of a temperate‐region locust (cf. Dociostaurus maroccanusThunberg 1815...
Authors
J. Meco, D.R. Muhs, M. Fontugne, A.J. Ramos, A. Lomoschitz, D. Patterson
The use of scenario analysis to assess water ecosystem services in response to future land use change in the Willamette River Basin, Oregon The use of scenario analysis to assess water ecosystem services in response to future land use change in the Willamette River Basin, Oregon
Human pressures on the natural resources of the United States have resulted in many unintended changes in our ecosystems, e.g., loss of biodiversity, habitat degradation, increases in the number of endangered species, and increases in contamination and water pollution. Environmental managers are concerned about broad-scale changes in land use and landscape pattern and their cumulative...
Authors
M. Hernandez, W. G. Kepner, D. G. Goodrich, Darius J. Semmens
Hydrothermal alteration of the Late Eocene Caetano ash-flow caldera, north-central Nevada: A field and ASTER remote sensing study Hydrothermal alteration of the Late Eocene Caetano ash-flow caldera, north-central Nevada: A field and ASTER remote sensing study
Geologic mapping and analysis of ASTER remote sensing data were used to define the effects of a large hydrothermal system in the 12–18 by 22 km Caetano caldera. The caldera formed at ~33.8Ma during eruption of >1100km3 of the rhyolitic Caetano Tuff that left a 1 km deep basin which was partly filled by a lake. Magma resurgence resulted in shallow(
Authors
David A. John, Barnaby W. Rockwell, Christopher D. Henry, Joseph P. Colgan
Social Values for Ecosystem Services (SolVES): using GIS to include social values information in ecosystem services assessments Social Values for Ecosystem Services (SolVES): using GIS to include social values information in ecosystem services assessments
Ecosystem services can be defined in various ways; simply put, they are the benefits provided by nature, which contribute to human well-being. These benefits can range from tangible products such as food and fresh water to cultural services such as recreation and esthetics. As the use of these benefits continues to increase, additional pressures are placed on the natural ecosystems...
Authors
B.C. Sherrouse, D.J. Semmens
Assessment of goods and valuation of ecosystem services (AGAVES) San Pedro River Basin, United States and Mexico Assessment of goods and valuation of ecosystem services (AGAVES) San Pedro River Basin, United States and Mexico
A consortium of federal, academic, and nongovernment organization (NGO) partners have established a collaborative research enterprise in the San Pedro River Basin to develop methods, standards, and tools to assess and value ecosystem goods and services. The central premise of ecosystem services research is that human condition is intrinsically linked to the environment. Human health and...
Authors
Darius J. Semmens, William Kepner, David Goodrich
Characterization of geologic deposits in the vicinity of US Ecology, Amargosa Basin, southern Nevada Characterization of geologic deposits in the vicinity of US Ecology, Amargosa Basin, southern Nevada
Multiple approaches have been applied to better understand the characteristics of geologic units exposed at the surface and buried at depth in the vicinity of US Ecology (USE), a low-level commercial waste site in the northern Amargosa Desert, Nevada. Techniques include surficial geologic mapping and interpretation of the subsurface using borehole data. Dated deposits at depth were used...
Authors
Emily M. Taylor
U.S. Geological Survey Science for the Wyoming Landscape Conservation Initiative-2009 Annual Report U.S. Geological Survey Science for the Wyoming Landscape Conservation Initiative-2009 Annual Report
This is the second report produced by the U.S. Geological Survey (USGS) for the Wyoming Landscape Conservation Initiative (WLCI) to detail annual work activities. The first report described work activities for 2007 and 2008; this report covers work activities conducted in 2009. Important differences between the two reports are that (1) this report does not lump all the Effectiveness...
Authors
Zachary H. Bowen, Cameron L. Aldridge, Patrick J. Anderson, Timothy J. Assal, Laura R. H. Biewick, Steven W. Blecker, R. Sky Bristol, Natasha B. Carr, Anna D. Chalfoun, Geneva W. Chong, James E. Diffendorfer, Bradley C. Fedy, Steven L. Garman, Stephen S. Germaine, Richard I. Grauch, JoAnn M. Holloway, Collin G. Homer, Matthew Kauffman, Douglas Keinath, Natalie Latysh, Daniel J. Manier, Robert R. McDougal, Cynthia P. Melcher, Kirk A. Miller, Jessica Montag, Constance J. Nutt, Christopher J. Potter, Hall Sawyer, Spencer Schell, Sarah L. Shafer, David B. Smith, Lisa L. Stillings, Michele L. Tuttle, Anna B. Wilson
Chemical and textural controls on phosphorus mobility in drylands of southeastern Utah Chemical and textural controls on phosphorus mobility in drylands of southeastern Utah
We investigated several forms of phosphorus (P) in dryland soils to examine the chemical and textural controls on P stabilization on a diverse set of substrates. We examined three P fractions including labile, moderately labile, and occluded as determined by a modified Hedley fractionation technique. The P fractions were compared to texture measurements and total elemental concentrations
Authors
Susan E. Buckingham, Jason Neff, Behan Titiz-Maybach, Richard L. Reynolds
Social values for ecosystem services (SolVES): A GIS application for assessing, mapping, and quantifying the social values of ecosystem services-Documentation and user manual, version 1.0 Social values for ecosystem services (SolVES): A GIS application for assessing, mapping, and quantifying the social values of ecosystem services-Documentation and user manual, version 1.0
In response to the need for incorporating quantified and spatially explicit measures of social values into ecosystem services assessments, the Rocky Mountain Geographic Science Center, in collaboration with Colorado State University, has developed a geographic information system application, Social Values for Ecosystem Services (SolVES). SolVES can be used to assess, map, and quantify...
Authors
Benson C. Sherrouse, Jodi L. Riegle, Darius J. Semmens
Atmospheric mineral dust in dryland ecosystems: Applications of environmental magnetism Atmospheric mineral dust in dryland ecosystems: Applications of environmental magnetism
Magnetic properties of shallow (
Authors
Richard L. Reynolds, Harland L. Goldstein, Mark E. Miller