Publications
Filter Total Items: 1471
Tree-ring dated landslide movements and seismic events in southwestern Montana, USA Tree-ring dated landslide movements and seismic events in southwestern Montana, USA
Because many tree species can live for several centuries or longer (Brown 1996), tree-ring analysis can be a valuable tool to date geomorphic events such as landslides, earthquakes, and avalanches in regions lacking long historical records. Typically, a catastrophic landslide will destroy all trees on the landslide, but trees on slower moving landslides may survive. For example, the...
Authors
Paul E. Carrara, J. Michael O’Neill
The role of African dust in the formation of Quaternary soils on Mallorca, Spain and implications for the genesis of Red Mediterranean soils The role of African dust in the formation of Quaternary soils on Mallorca, Spain and implications for the genesis of Red Mediterranean soils
African dust additions explain the origin of terra rossa soils that are common on the carbonate-platform island of Mallorca, Spain. Mineralogical and geochemical analyses indicate that Quaternary carbonate eolianites on Mallorca have a very high purity, usually composed of more than 90% carbonate minerals (calcite, dolomite, and aragonite). In contrast, terra rossa soils developed on...
Authors
D.R. Muhs, J. Budahn, A. Avila, G. Skipp, J. Freeman, D. Patterson
Limited hydrologic response to Pleistocene climate change in deep vadose zones - Yucca Mountain, Nevada Limited hydrologic response to Pleistocene climate change in deep vadose zones - Yucca Mountain, Nevada
Understanding the movement of water through thick vadose zones, especially on time scales encompassing long-term climate change, is increasingly important as societies utilize semi-arid environments for both water resources and sites viewed as favorable for long-term disposal or storage of hazardous waste. Hydrologic responses to Pleistocene climate change within a deep vadose zone in...
Authors
J.B. Paces, L.A. Neymark, J. F. Whelan, J. L. Wooden, S.P. Lund, B.D. Marshall
Distribution of major anions and trace elements in the unsaturated zone at Franklin Lake Playa, California, USA Distribution of major anions and trace elements in the unsaturated zone at Franklin Lake Playa, California, USA
The composition of surficial salts formed near dry and drying saline lakes are partly the product of processes active in the unsaturated zone between the ground surface and the water table. These processes were investigated by determining the abundance of water-extractable solutes in sediment from the ground surface to the water table (~2.8 m) beneath Franklin Lake playa, California...
Authors
George N. Breit, Harland L. Goldstein, Richard L. Reynolds, James C. Yount
Holocene record of major and trace components in the sediments of an urban impoundment on the Mississippi River: Lake Pepin, Minnesota and Wisconsin Holocene record of major and trace components in the sediments of an urban impoundment on the Mississippi River: Lake Pepin, Minnesota and Wisconsin
Lake Pepin is a natural impoundment formed by damming of the Mississippi River about 9,180 radiocarbon years ago (19,600 calendar years) by an alluvial fan deposited by the Chippewa River, a tributary of the Mississippi in Wisconsin. Unique among 26 Mississippi River impoundments, Lake Pepin has stratigraphically preserved Holocene materials, including pollutants, that have been...
Authors
Walter E. Dean
Effects of roads, topography, and land use on forest cover dynamics in the Brazilian Atlantic Forest Effects of roads, topography, and land use on forest cover dynamics in the Brazilian Atlantic Forest
Roads and topography can determine patterns of land use and distribution of forest cover, particularly in tropical regions. We evaluated how road density, land use, and topography affected forest fragmentation, deforestation and forest regrowth in a Brazilian Atlantic Forest region near the city of São Paulo. We mapped roads and land use/land cover for three years (1962, 1981 and 2000)...
Authors
Simone R. Freitas, Todd Hawbaker, Jean Paul Metzger
Physical, Chemical, Ecological, and Age Data and Trench Logs from Surficial Deposits at Hatch Point, Southeastern Utah Physical, Chemical, Ecological, and Age Data and Trench Logs from Surficial Deposits at Hatch Point, Southeastern Utah
This report presents data and describes the methodology for physical, chemical and ecological measurements of sediment, soil, and vegetation, as well as age determinations of surficial deposits at Hatch Point, Canyon Rims area, Colorado Plateau, southeastern Utah. The results presented in this report support a study that examines geomorphic and soil factors that may influence boundaries...
Authors
Harland L. Goldstein, Mark E. Miller, James C. Yount, Marith C. Reheis, Richard L. Reynolds, Jayne Belnap, Paul J. Lamothe, John P. McGeehan
Planning for an uncertain future - Monitoring, integration, and adaptation Planning for an uncertain future - Monitoring, integration, and adaptation
The 6.7 billion human inhabitants of the earth have the ability to drastically alter ecosystems and the populations of species that have taken eons to evolve. By better understanding how our actions affect the environment, we stand a better chance of designing successful strategies to manage ecosystems sustainably. Toward this end, the Third Interagency Conference on Research in the...
The ecology of dust The ecology of dust
Wind erosion and associated dust emissions play a fundamental role in many ecological processes and provide important biogeochemical connectivity at scales ranging from individual plants up to the entire globe. Yet, most ecological studies do not explicitly consider dust‐driven processes, perhaps because most relevant research on aeolian (wind‐driven) processes has been presented in a...
Authors
Jason P. Field, Jayne Belnap, David D. Breshears, Jason C. Neff, Gregory S Okin, J.J. Whicker, Thomas H. Painter, Sujith Ravi, Marith C. Reheis, Richard L. Reynolds
Wildfire risk in the wildland-urban interface: A simulation study in northwestern Wisconsin Wildfire risk in the wildland-urban interface: A simulation study in northwestern Wisconsin
The rapid growth of housing in and near the wildland–urban interface (WUI) increases wildfire risk to lives and structures. To reduce fire risk, it is necessary to identify WUI housing areas that are more susceptible to wildfire. This is challenging, because wildfire patterns depend on fire behavior and spread, which in turn depend on ignition locations, weather conditions, the spatial...
Authors
Avi Bar Massada, Volker C. Radeloff, Susan I. Stewart, Todd Hawbaker
U.S. Geological Survey Science for the Wyoming Landscape Conservation Initiative - 2008 Annual Report U.S. Geological Survey Science for the Wyoming Landscape Conservation Initiative - 2008 Annual Report
The Wyoming Landscape Conservation Initiative (WLCI) was launched in 2007 in response to concerns about threats to the State's world class wildlife resources, especially the threat posed by rapidly increasing energy development in southwest Wyoming. The overriding purpose of the WLCI is to assess and enhance aquatic and terrestrial habitats at a landscape scale, while facilitating...
Authors
Zachary H. Bowen, Cameron L. Aldridge, Patrick J. Anderson, Timothy J. Assal, Lori Anne Baer, R. Sky Bristol, Natasha B. Carr, Geneva W. Chong, Jay E. Diffendorfer, Bradley C. Fedy, Steven L. Garman, Steve Germaine, Richard I. Grauch, Collin G. Homer, Daniel J. Manier, Matthew J. Kauffman, Natalie Latysh, Cynthia P. Melcher, Kirk A. Miller, Jessica Montag, Constance J. Nutt, Christopher Potter, Hall Sawyer, David B. Smith, Michael J. Sweat, Anna B. Wilson
The dynamic interaction of climate, vegetation, and dust emission, Mojave Desert, USA The dynamic interaction of climate, vegetation, and dust emission, Mojave Desert, USA
No abstract available.
Authors
Frank Urban, Richard L. Reynolds, R. Fulton