Publications
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Last Glacial loess in the conterminous USA
The conterminous United States contains an extensive and generally well-studied record of Last Glacial loess. The loess occurs in diverse physiographic provinces, and under a wide range of climatic and ecological conditions. Both glacial and non-glacia lloess sources are present, and many properties of the loess vary systematically with distance from loess sources. United States' mid-continent Las
Authors
E. Arthur Bettis, Daniel R. Muhs, Helen M. Roberts, Ann G. Wintle
Quaternary loess-Paleosol sequences as examples of climate-driven sedimentary extremes
No abstract available.
Authors
Daniel R. Muhs, E. Arthur Bettis
Geology of the Right Stepover region between the Rodgers Creek, Healdsburg, and Maacama faults, northern San Francisco Bay region: A contribution to Northern California Geological Society Field Trip Guide, June 6-8, 2003
This Open file report was written as part of a two-day field trip on
June 7 and 8, 2003, conducted for the Northern California Geological
Society. The first day of this field trip (June 7) was led by McLaughlin and
Sarna-Wojcicki in the area of the right- step between the Rodgers Creek-
Healdsburg fault zone and the Maacama fault. The second day of the trip
(June 8), was led by David Wagner o
Authors
Robert J. McLaughlin, Andrei Sarna-Wojcicki
Quaternary stratigraphy, geomorphology, soils, and alpine archaeology in an alpine-to-plains transect, Colorado Front Range
No abstract available.
Authors
David P. Dethier, James B. Benedict, Peter W. Birkeland, Nel Caine, P. Thompson Davis, Richard F. Madole, Penny E. Patterson, Alan B. Price, Taylor F. Schildgen, Ralph R. Shroba
Tectonic controls of Mississippi Valley-type lead-zinc mineralization in orogenic forelands
Most of the world's Mississippi Valley-type (MVT) zinc-lead deposits occur in orogenic forelands. We examine tectonic aspects of foreland evolution as part of a broader study of why some forelands are rich in MVT deposits, whereas others are barren. The type of orogenic foreland (collisional versus Andean-type versus inversion-type) is not a first-order control, because each has MVT deposits (e.g.
Authors
D. C. Bradley, D. L. Leach
Pliocene to middle Pleistocene lakes in the western Great Basin: Ages and connections
No abstract available.
Authors
Marith C. Reheis, Andrei M. Sarna-Wojcicki, Richard L. Reynolds, C. A. Repenning, Martin D. Mifflin
Reply to Discussion on "Mississippi Valley-type lead–zinc deposits through geological time: implications from recent age-dating research"
No abstract available.
Authors
David L. Leach, Dwight Bradley, Michael T. Lewchuk, David T. Symons, Wayne R. Premo, Joyce Brannon, G. De Marsily
Monitoring dust storms and mapping landscape vulnerability to wind erosion using satellite and ground-based digital images
Wind-induced dust emission in the southwestern United States is important regionally because of its impact on human health and safety and its influence on ecosystem dynamics. Factors that control dust emission include wind velocity, sediment availability, and surface conditions (e.g., vegetation type and degree of cover, surface crusts and armoring, and soil moisture - Gillette and Passi, 1988; Gi
Authors
Pat S. Chavez, David MacKinnon, Richard L. Reynolds, Miguel G. Velasco
An ENSO predictor of dust emission in the southwestern United States
Here we show that there is a significant relationship between Nino 3.4 ENSO anomaly (Dec–Jan average) and precipitation in the southwestern United States. This contributes to increased frequency of dust events in the years following strong La Niña and El Niño years. High probabilities (60%–100%) exist for an elevated frequency of dust events in years when the ENSO anomaly, annual precipitation, or
Authors
Gregory S Okin, Marith C. Reheis
Tension cracks, eruptive fissures, dikes, and faults related to late Pleistocene-Holocene basaltic volcanism and implications for the distribution of hydraulic conductivity in the eastern Snake River Plain, Idaho
No abstract available.
Authors
Mel A. Kuntz, Steven R. Anderson, Duane E. Champion, Marvin A. Lanphere, Daniel J. Grunwald
Early Holocene change in atmospheric circulation in the Northern Great Plains: An upstream view of the 8.2 ka cold event
Elk Lake, in northwestern Minnesota, contains numerous proxy records of climatic and environmental change contained in varved sediments with annual resolution for the last 10,000 years. These proxies show that about 8200 calendar years ago (8.2 cal. ka; 7300 radiocarbon years) Elk Lake went from a well-stratified lake that was wind-protected in a boreal forest to a well-mixed lake in open prairie
Authors
Walter E. Dean, Richard M. Forester, J. Platt Bradbury
Progress in global lake drilling holds potential for global change research
During the past decade, numerous international investigations of past global change have focused on particular time intervals, or “Time Streams,” suggested by the Past Global Changes (PAGES) Project of the International Geosphere‐Biosphere Programme (IGBP). Time Stream 1 encompasses the last 2000 years, and Time Stream 2 encompasses at least the last 250,000 years. Geographically many of these stu
Authors
Walter E. Dean, Joseph G. Rosenbaum, Brian J. Haskell, K. Kelts, Douglas Schurrenberger, Blas L. Valero Garcés, Andrew S. Cohen, Owen Davis, D. Dinter, Dennis Nielson