Publications
Filter Total Items: 1493
Barrier island response to late Holocene climate events, North Carolina, USA Barrier island response to late Holocene climate events, North Carolina, USA
The Outer Banks barrier islands of North Carolina, USA, contain a geologic record of inlet activity that extends from ca. 2200 cal yr BP to the present, and can be used as a proxy for storm activity. Optically stimulated luminescence (OSL) dating (26 samples) of inlet-fill and flood tide delta deposits, recognized in cores and geophysical data, provides the basis for understanding the...
Authors
D. J. Mallinson, C. W. Smith, S. Mahan, S.J. Culver, K. McDowell
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, Jay 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
Three-dimensional geologic model of the Arbuckle-Simpson aquifer, south-central Oklahoma Three-dimensional geologic model of the Arbuckle-Simpson aquifer, south-central Oklahoma
The Arbuckle-Simpson aquifer of south-central Oklahoma encompasses more than 850 square kilometers and is the principal water resource for south-central Oklahoma. Rock units comprising the aquifer are characterized by limestone, dolomite, and sandstones assigned to two lower Paleozoic units: the Arbuckle and Simpson Groups. Also considered to be part of the aquifer is the underlying...
Authors
Jason R. Faith, Charles D. Blome, Michael P. Pantea, James O. Puckette, Todd Halihan, Noel Osborn, Scott Christenson, Skip Pack
Temperature and precipitation history of the Arctic Temperature and precipitation history of the Arctic
As the planet cooled from peak warmth in the early Cenozoic, extensive Northern Hemisphere ice sheets developed by 2.6 Ma ago, leading to changes in the circulation of both the atmosphere and oceans. From ∼2.6 to ∼1.0 Ma ago, ice sheets came and went about every 41 ka, in pace with cycles in the tilt of Earth’s axis, but for the past 700 ka, glacial cycles have been longer, lasting ∼100...
Authors
G. H. Miller, J. Brigham-Grete, R. B. Alley, Lesleigh Anderson, H.A. Bauch, M. S. V. Douglas, M. E. Edwards, S. A. Elias, B. P. Finney, Joan J. Fitzpatrick, S. V. Funder, T. D. Herbert, L. D. Hinzman, D. S. Kaufman, G. M. MacDonald, L. Polyak, A. Robock, M. C. Serreze, J. P. Smol, J. W. C. White, A. P. Wolfe, E. W. Wolff