Preliminary Geologic Map of the Topanga 7.5' Quadrangle, Southern California: A Digital Database
R.F. Yerkes, R. H. Campbell
1995, Open-File Report 95-91
INTRODUCTION This Open-File report is a digital geologic map database. This pamphlet serves to introduce and describe the digital data. There is no paper map included in the Open-File report. This digital map database is compiled from previously published sources combined with some new mapping and modifications in nomenclature. The geologic map...
Dog "bites" earthquake; a handout for the valley/mountain shaking model
John R. Evans, J.M. Coakley
1995, Open-File Report 95-22
Maps showing modern fissures and Quaternary faults in the Dry Lake Valley area, Lincoln County Nevada
W. C. Swadley
1995, IMAP 2501
No abstract available....
Wind shear stress measurements in a coastal marsh during Hurricane Andrew
J. R. Dingler, S.A. Hsu, A. Lee Foote
1995, Journal of Coastal Research 295-305
Hurricane Andrew produced changes to the Louisiana wetlands not normally observed after lesser, more common storms. For example, the <25 m/s wind speeds generated by cold fronts and winter storms, and any accompanying storm surge, do not cause substantial, wide-spread alteration of marsh vegetation. During Hurricane Andrew, however, the wind,...
Structural impact of hurricane Andrew on the forested wetlands of the Atchaflaya Basin in South Louisiana
Thomas W. Doyle, Bobby D. Keeland, Lance E. Gorham, Darrin J. Johnson
1995, Journal of Coastal Research 354-364
On August 26, 1992, Hurricane Andrew hit the Louisiana coast and traversed a large portion of the lower Atchafalaya Basin, bounding the largest remaining tract of cypress-tupelo and bottomland hardwood swamp in the United States. Permanent field sites were established following the hurricane to assess the extent of forest damage...
Seismic velocity structure and composition of the continental crust: A global view
Nikolas I. Christensen, Walter D. Mooney
1995, Journal of Geophysical Research B: Solid Earth (100) 9761-9788
Seismic techniques provide the highest‐resolution measurements of the structure of the crust and have been conducted on a worldwide basis. We summarize the structure of the continental crust based on the results of seismic refraction profiles and infer crustal composition as a function of depth by comparing...
U.S. Fish and Wildlife Service 1979 wetland classification: A review
L.M. Cowardin, F.C. Golet
1995, Vegetatio (118) 139-152
In 1979 the US Fish and Wildlife Service published and adopted a classification of wetlands and deepwater habitats of the United States. The system was designed for use in a national inventory of wetlands. It was intended to be ecologically based, to furnish the mapping units needed for the inventory,...
Lead isotopes from the Upper Mississippi Valley district: A regional perspective
Timothy M. Millen, Robert E. Zartman, Allen Van Heyl
1995, Bulletin 2094-B
New lead isotopic data on galena from within and peripheral to the Upper Mississippi Valley lead-zinc district make it possible, by extending coverage to outlying locations, to trace the pathway traversed by the mineralizing fluids beyond the boundary of the main district. All but one of the samples exhibit elevated...
Characterization of the Cottonwood Grove and Ridgely faults near Reelfoot Lake, Tennessee, from high-resolution seismic reflection data
William J. Stephenson, Kaye M. Shedlock, Jack K. Odum
1995, Professional Paper 1538-I
In the winter of 1811-12, three of the largest historic earthquakes in the United States occurred near New Madrid, Missouri. Seismicity continues to the present day throughout a tightly clustered pattern of epicenters centered on the bootheel of Missouri, including parts of northeastern Arkansas, northwestern Tennessee, western Kentucky, and southern...
Sedimentology, Behavior, and Hazards of Debris Flows at Mount Rainier, Washington
K. M. Scott, J.W. Vallance, P. T. Pringle
1995, Professional Paper 1547
Mount Rainier is potentially the most dangerous volcano in the Cascade Range because of its great height, frequent earthquakes, active hydrothermal system, and extensive glacier mantle. Many debris flows and their distal phases have inundated areas far from the volcano during postglacial time. Two types of debris flows, cohesive and...
An empirical equation for modeling rare earth element mineral-mineral partitioning; an application to mantle metasomatism
James R. Budahn
1995, Open-File Report 91-596
GPRMODV2; one-dimensional full waveform forward modeling of dispersive ground penetrating radar data, version 2.0
Michael H. Powers, G.R. Olhoeft
1995, Open-File Report 95-58
Chemical evolution of groundwater near a sinkhole lake, northern Florida: 2. Chemical patterns, mass-transfer modeling, and rates of chemical reactions
Brian G. Katz, Niel Plummer, Eurybiades Busenberg, Kinga M. Revesz, Blair F. Jones, Terrie M. Lee
1995, Water Resources Research (31) 1565-1584
Chemical patterns along evolutionary groundwater flow paths in silicate and carbonate aquifers were interpreted using solute tracers, carbon and sulfur isotopes, and mass balance reaction modeling for a complex hydrologic system involving groundwater inflow to and outflow from a sinkhole lake in northern Florida. Rates of dominant reactions along defined...
Chemical evolution of groundwater near a sinkhole lake, northern Florida: 1. Flow patterns, age of groundwater, and influence of lakewater leakage
Brian G. Katz, Terrie M. Lee, Niel Plummer, Eurybiades Busenberg
1995, Water Resources Research (31) 1549-1564
Leakage from sinkhole lakes significantly influences recharge to the Upper Floridan aquifer in poorly confined sediments in northern Florida. Environmental isotopes (oxygen 18, deuterium, and tritium), chlorofluorocarbons (CFCs: CFC-11, CCl3F; CFC-12, CCl2F2; and CFC-113, C2Cl3F3), and solute tracers were used to investigate groundwater flow patterns near Lake Barco, a seepage...
Dust deposition in southern Nevada and California, 1984–1989: Relations to climate, source area, and source lithology
Marith C. Reheis, Rolf Kihl
1995, Journal of Geophysical Research D: Atmospheres (100) 8893-8918
Dust samples collected annually for 5 years from 55 sites in southern Nevada and California provide the first regional source of information on modern rates of dust deposition, grain size, and mineralogical and chemical composition relative to climate and to type and lithology of dust source. The...
Influence of static stress changes on earthquake locations in southern California
R.A. Harris, R.W. Simpson, P.A. Reasenberg
1995, Nature (375) 221-224
Earthquakes induce changes in static stress on neighbouring faults that may delay, hasten or even trigger subsequent earthquakes1–10. The length of time over which such effects persist has a bearing on the potential contribution of stress analyses to earthquake hazard assessment, but is presently unknown. Here we use an elastic...
Mortality estimates of striped bass caught in Albemarle Sound and Roanoke River, North Carolina
Robert Dorazio
1995, North American Journal of Fisheries Management (15) 290-299
A statistical analysis of the age composition of striped bass Morone saxatilis harvested in Albemarle Sound and the Roanoke River, North Carolina. indicated that in 1988–1992 the population experienced a relatively high rate of total mortality. Age‐3 and older fish were estimated to have been fully vulnerable to fishing mortality and to...
Combining the Neuman and Boulton models for flow to a well in an unconfined aquifer
Allen F. Moench
1995, Groundwater (33) 378-384
A Laplace transform solution is presented for flow to a well in a homogeneous, water-table aquifer with noninstanta-neous drainage of water from the zone above the water table. The Boulton convolution integral is combined with Darcy's law and used as an upper boundary condition to replace the condition used by...
Preliminary geologic map of the Calabasas 7.5' quadrangle, southern California: A digital database
R. F. Yerkes, R. H. Campbell
1995, Open-File Report 95-51
This Open-File report is a digital geologic map database. This pamphlet serves to introduce and describe the digital data. There is no paper map included in the Open-File report. This digital map database is compiled from previously published sources combined with some new mapping and modifications in nomenclature. The geologic...
Processes controlling the chemistry of two snowmelt‐dominated streams in the Rocky Mountains
Donald H. Campbell, David W. Clow, George P. Ingersoll, M. Alisa Mast, Norman E. Spahr, John T. Turk
1995, Water Resources Research (31) 2811-2821
Time‐intensive discharge and chemical data for two alpine streams in the Loch Vale watershed, Colorado, were used to identify sources of runoff, flow paths, and important biogeochemical processes during the 1992 snowmelt runoff season. In spite of the paucity of soil cover the chemical composition of the streams is regulated...
Near real-time monitoring of seismic events and status of portable digital recorders using satellite telemetry
R.J. Mueller, Meei-You Lee, M.J.S. Johnston, Roger D. Borcherdt, G. Glassmoyer, S. Silverman
1995, Bulletin of the Seismological Society of America (85) 640-645
Near real-time monitoring of seismic events and status of portable 16-bit digital recorders has been established for arrays near Parkfield, Mammoth Lakes, and San Francisco, California. This monitoring system provides near real-time seismic event identification (rough location and magnitude) and a cost-effective means to maintain arrays at near 100% operational...
The Grayback Pluton: Magmatism in a Jurassic back-arc environment, Klamath Mountains, Oregon
Calvin G. Barnes, Kenneth Johnson, Melanie Barnes, Tore Prestvik, Ronald W. Kistler, Bjorn Sundvoll
1995, Journal of Petrology (36) 397-415
The Jurassic Grayback pluton was emplaced in a back-arc setting behind a contemporaneous oceanic arc. Th\alphae main stage of the pluton consists of an early, reversely zoned tonalite to gabbro that was intruded by synplutonic noritic and gabbroic magmas. Late-stage activity was characterized by intrusion of tonalitic and granitic...
Late Quaternary paleoceanography of the Eurasian Basin, Arctic Ocean
Thomas M. Cronin, Thomas R. Holtz Jr., R. Stein, R. Spielhagen, Dieter Karl Futterer, Jutta E. Wollenburg
1995, Paleoceanography and Paleoclimatology (10) 259-281
We reconstructed late Quaternary deep (3000–4100 m) and intermediate depth (1000–2500 m) paleoceanographic history of the Eurasian Basin, Arctic Ocean from ostracode assemblages in cores from the Lomonosov Ridge, Gakkel Ridge, Yermak Plateau, Morris Jesup Rise, and Amundsen and Makarov Basins obtained during the 1991 Polarstern cruise. Modern assemblages on ridges and...
Three-dimensional modeling of pull-apart basins: implications for the tectonics of the Dead Sea Basin
Rafael Katzman, Uri S. ten Brink, Jian Lin
1995, Journal of Geophysical Research B: Solid Earth (100) 6295-6312
We model the three-dimensional (3-D) crustal deformation in a deep pull-apart basin as a result of relative plate motion along a transform system and compare the results to the tectonics of the Dead Sea Basin. The brittle upper crust is modeled by a boundary element technique as an elastic block,...
Transport of chromium and selenium in a pristine sand and gravel aquifer: Role of adsorption processes
D.B. Kent, J.A. Davis, L.C.D. Anderson, B.A. Rea
1995, Water Resources Research (31) 1041-1050
Field transport experiments were conducted in an oxic sand and gravel aquifer using Br (bromide ion), Cr (chromium, injected as Cr(VI)), Se (selenium, injected as Se(VI)), and other tracers. The aquifer has mildly acidic pH values and low concentrations of dissolved salts. Within analytical errors, all mobile Cr was present as...
