Publications
Publications from the staff of the Geology, Minerals, Energy, and Geophysics Science Center
Filter Total Items: 2486
The potential response of eolian sands to greenhouse warming and precipitation reduction on the Great Plains of the U.S.A. The potential response of eolian sands to greenhouse warming and precipitation reduction on the Great Plains of the U.S.A.
Sand dunes and sand sheets are extensive on the semi-arid GreatPlains but are at present stabilized by a sparse vegetation cover. Use of a dune mobility index, which incorporates wind strength and the ratio of mean annual precipitation to potential evapotranspiration, shows that under predicted greenhouse climate effects of increased temperature and reduced precipitation, sand dunes and...
Authors
D.R. Muhs, P.B. Maat
Geologic studies in Alaska by the U.S. Geological Survey, 1992 Geologic studies in Alaska by the U.S. Geological Survey, 1992
This collection of 19 papers continues the annual series of U.S. Geological Survey reports on the geology of Alaska. The contributions, which include full-length Articles and shorter Geologic Notes, cover a broad range of topics including dune formation, stratigraphy, paleontology, isotopic dating, mineral resources, and tectonics. Articles, grouped under four regional headings, span...
Late Quaternary paleoceanography of the Pervenets Canyon area of the Bering Sea: Evidence from the diatom flora Late Quaternary paleoceanography of the Pervenets Canyon area of the Bering Sea: Evidence from the diatom flora
Sediments from three gravity cores from an east-west shelf-to-slope transect along the axis of Pervenets Canyon in the northern Navarin basin, Bering Sea were analyzed for diatoms. The diatom floras present in the cores were divided into four assemblages following Sancetta (1981). The Bering Basin (deep water open ocean) and Sea Ice (ice cover at least six months per year) Assemblages...
Authors
Scott W. Starratt
Understanding our fragile environment; Lessons from geochemical studies Understanding our fragile environment; Lessons from geochemical studies
An understanding of our fragile environment can begin with a recognition of the importance of certain elements, commonly called "minerals substances" (such as iron and zinc), in the lives of humans and animals and in the soils that support plants. This recognition is well deserved because these elements are essential for the life or optimum health of an organism. Some elements such as...
Authors
Larry P. Gough, Sigrid Asher-Bolinder, Laurie S. Balistrieri, George N. Breit, Thomas J. Casadevall, James G. Crock, Kimberley I. Cunningham, Joseph S. Duval, James A. Erdman, Barbara M. Erickson, Walter H. Ficklin, Larry L. Jackson, Rama K. Kotra, Joel S. Leventhal, James M. McNeal, William R. Miller, James K. Otton, Douglass E. Owen, Geoffrey S. Plumlee, G. Michael Reimer, Ronald C. Severson, Kathleen S. Smith, Ronald R. Tidball, Robert A. Zielinski
National Earthquake Hazards Reduction Program, summaries of technical reports; volume XXXIV National Earthquake Hazards Reduction Program, summaries of technical reports; volume XXXIV
No abstract available.
Authors
Muriel L. Jacobson
Bristol Lake basin--a deep sedimentary basin along the Bristol-Danby trough, Mojave Desert Bristol Lake basin--a deep sedimentary basin along the Bristol-Danby trough, Mojave Desert
No abstract available.
Authors
R.C. Jachens, Keith A. Howard
Kinematic evidence for extensional unroofing of the Franciscan Complex along the Coast Range Fault, Northern Diablo Range, California Kinematic evidence for extensional unroofing of the Franciscan Complex along the Coast Range Fault, Northern Diablo Range, California
Franciscan metagraywacke immediately below the Del Puerto ophiolite, an outlier of the Coast Range ophiolite in the northern Diablo Range, was sheared during top‐to‐the‐east displacement on the Coast Range fault. This represents normal faulting and extensional offset. It was accompanied by attenuation of the Coast Range ophiolite and Great Valley sequence in the hanging wall along layer...
Authors
T.A. Harms, A. S. Jayko, M. Clark Blake
530 Ma zircon age for ophiolite from the New England orogen: Oldest rocks known from eastern Australia 530 Ma zircon age for ophiolite from the New England orogen: Oldest rocks known from eastern Australia
New ion microprobe data provide constraints on the timing of formation of ophiolitic rocks in the New England tectonic collage in eastern Australia. Results for analyses of magmatic zircons from plagiogranite of the Weraerai terrane ophiolite at Upper Bingara give a 206pb/238|j ag e Qf 53Q ± 6 Ma (2a). This plagiogranite is the oldest rock from eastern Australia yet identified. Existing...
Authors
J.C. Aitchinson, T. R. Ireland, M. Clark Blake, P.G. Flood
Pliocene paleoclimatic interpretation of DSDP Site 580 (NW Pacific) using diatoms Pliocene paleoclimatic interpretation of DSDP Site 580 (NW Pacific) using diatoms
High-resolution quantitative diatom data are tabulated for the early part of the late Pliocene (3.25 to 2.08 Ma) at DSDP Site 580 in the northwestern Pacific. Sample spacing averages 11 k.y. between 3.1 and 2.8 Ma, but increases to 14 to 19 k.y. prior to 3.1 Ma and after 2.8 Ma.Q-mode factor analysis of the middle Pliocene assemblage reveals four factors which explain 92.4% of the total...
Authors
John A. Barron
Hydrological, geomorphological, and chemical effects of Hurricane Andrew on coastal marshes of Louisiana Hydrological, geomorphological, and chemical effects of Hurricane Andrew on coastal marshes of Louisiana
Hydrological conditions are reported for the hurricane-induced storm surge at marsh sites in Terrebonne and Barataria Basins. There was a 6 hour or greater delay in the arrival of the storm surge at interior marsh sites compared to coastal locations. A water surge of about 1.5 m with a salinity of 10–15‰ was recorded at an intermediate salinity marsh site in Terrebonne Basin where...
Authors
Larry L. Jackson, A.L. Foote, Laurie S. Balistrieri