A thrust-ridge paleodepositional model for the Upper Freeport coal bed and associated clastic facies, Upper Potomac coal field, Appalachian basin, U.S.A.
Edward S. Belt, P.C. Lyons
1989, International Journal of Coal Geology (12) 293-328
A blind-thrust-ridge model is proposed to explain the lack of coarse clastic material in the vast minable Upper Freeport coal bed (UF). This coal bed contains only fine elastic partings and is overlain by regionally extensive, closely spaced channel-belt deposits in...
Three-dimensional records of surface displacement on the Superstition Hills fault zone associated with the earthquakes of 24 November 1987
R. V. Sharp, J.L. Saxton
1989, Bulletin of the Seismological Society of America (79) 376-389
Seven quadrilaterals, constructed at broadly distributed points on surface breaks within the Superstition Hills fault zone, were repeatedly remeasured after the pair of 24 November 1987 earthquakes to monitor the growing surface displacement. Changes in the dimensions of the quadrilaterals are recalculated to right-lateral and extensional components at millimeter resolution,...
Field measurements of dry deposition to spruce foliage and petri dishes in the Black Forest, F.R.G.
J. B. Shanley
1989, Atmospheric Environment (23) 403-414
Dry deposition fluxes of Ca2+, Mg2+ , K+, Mn2+, Pb2+ and SO2−4 to spruce foliage and petri dishes were measured in two high-elevation sites ( > 900 m) in the southern Black Forest, F.R.G., during 12 periods (2–7 days, each) from mid-September to mid-November, 1983, In situ extraction of deposited material from small spruce branches...
Spatial and temporal variability in South San Francisco Bay (USA). I. Horizontal distributions of salinity, suspended sediments, and phytoplankton biomass and productivity
T.M. Powell, J. E. Cloern, L.M. Huzzey
1989, Estuarine, Coastal and Shelf Science (28) 583-597
The horizontal pattern of mesoscale (1–4 km) variability in salinity was a poor predictor of mesoscale patterns in chlorophyll a, suspended particulate matter, and daily primary productivity in the South San Francisco Bay estuary during spring 1987. The tidally-averaged salinity distribution varied over weekly time scales, reflecting inputs of freshwater as...
Lagoonal deposits in the Upper Cretaceous Rock Springs Formation (Mesaverde Group), southwest Wyoming
M.A. Kirschbaum
1989, Marine Geology (88) 349-364
Most paleogeographic reconstructions of the Rock Springs Formation show shorelines having lobate to arcuate deltas. These shorelines are oriented NE-SW, with the sea to the southeast. Brackish-water bodies are usually shown in interdistributary areas or associated with abandoned delta lobes, and are open to the sea. In this study,...
Uranium-series nuclides in the Golden fault, Colorado, U.S.A.: Dating latest fault displacement and measuring recent uptake of radionuclides by fault-zone materials
Barney J. Szabo, J.N. Rosholt
1989, Applied Geochemistry (4) 177-182
Concentrations and isotopic ratios of U, Th and Ra were measured in a fault zone near Golden, Colorado where major displacement occurred between about 190 and 615 ka. Faulting created new surfaces for leaching and provided the pathways for U-rich ground...
Pockmarks in the floor of Penobscot Bay, Maine
Kathryn M. Scanlon, Harley J. Knebel
1989, Geo-Marine Letters (9) 53-58
Hundreds of depressions (pockmarks) were found within a 40 square kilometer area of the sea floor near the head of Penobscot Bay, Maine. These roughly circular depressions range in diameter from 10 to 300 meters and extend as much as 30 meters below the surrounding sea floor. The pockmarks have...
Trace metal associations in the water column of South San Francisco Bay, California
J.S. Kuwabara, Cecily C.Y. Chang, J. E. Cloern, T. L. Fries, J.A. Davis, S. N. Luoma
1989, Estuarine, Coastal and Shelf Science (28) 307-325
Spatial distributions of copper (Cu), zinc (Zn) and cadmium (Cd) were followed along a longitudinal gradient of dissolved organic carbon (DOC) in South San Francisco Bay (herein referred to as the South Bay). Dissolved Cu, Zn and Cd concentrations ranged from 24 to...
Convergent radial dispersion: A Laplace transform solution for aquifer tracer testing
Allen F. Moench
1989, Water Resources Research (25) 439-447
A Laplace transform solution was obtained for the injection of a tracer in a well situated in a homogeneous aquifer where steady, horizontal, radially convergent flow has been established due to pumping at a second well. The standard advection-dispersion equation for mass transfer was used as the controlling equation. For...
Image processing techniques for digital orthophotoquad production
Joy J. Hood, L. J. Ladner, Richard A. Champion
1989, Photogrammetric Engineering and Remote Sensing (55) 1323-1329
Orthophotographs have long been recognized for their value as supplements or alternatives to standard maps. Recent trends towards digital cartography have resulted in efforts by the US Geological Survey to develop a digital orthophotoquad production system. Digital image files were created by scanning color infrared photographs on a microdensitometer. Rectification...
Impacts of exploratory drilling for oil and gas on the benthic environment of Georges Bank
J. M. Neff, Michael H. Bothner, N. J. Maciolek, J. F. Grassle
1989, Marine Environmental Research (27) 77-114
A 3-year monitoring program was performed to assess the impacts of exploratory drilling for oil and gas on the benthic environment of Georges Bank, an important commercial fishery region in the North Atlantic east of Massachusetts, USA. Surficial sediments were sampled for chemical and benthic infaunal analysis and bottom still...
The Moon; twenty years later
R. A. Kerr
1989, Earthquakes & Volcanoes (USGS) (21) 145-146
The 20th anniversary of the first landing on the Moon occurred on July 21, 1989. The vast majority of the Moon rocks collected by the Apollo mission astronauts await further study in the continuing effort to unravel the origin and evolution of Earth's nearest neighbor. Not that the 382-kilogram treasure...
Holocene sand shoals offshore of the Mississippi River delta plain
Shea Penland, John R. Suter, Randolph A. McBride, S. Jeffress Williams, Jack L. Kindinger, Ron Boyd
1989, Gulf Coast Association of Geological Societies Transactions (39) 471-480
Offshore of the Mississippi River delta plain lies a series of Holocene sand shoals marking the position of ancient submerged shorelines associated with younger shelf-phase delta plains. These submerged shorelines represent positions when sea level stood lower than present. Short periods of rapid sea level rise during the Holocene transgression,...
Recent carbonate slope sediments and sedimentary processes bordering a non-rimmed platform: southwest Florida continental margin
Gregg R. Brooks, Charles W. Holmes
1989, Book chapter, Controls on carbonate platforms and basin development
No abstract available....
Inner shelf deposits of the Louisiana-Mississippi-Alabama region, Gulf of Mexico
Jack L. Kindinger, Shea Penland, S. Jeffress Williams, John R. Suter
1989, Gulf Coast Association of Geological Societies Transactions (39) 413-420
The late Quaternary morphology, shallow stratigraphy and sediment distribution of the Louisiana-Mississippi-Alabama inner shelf region are the product of transgressive and regressive sedimentary processes. Shelf sedimentary facies were deposited by deltaic progradation, followed by shoreface erosion and submergence. This information is based on interpretations and synthesis of more than 4,160...
Microearthquake spectra from the Anza, California, seismic network: Site response and source scaling
Arthur D. Frankel, Leif Wennerberg
1989, Bulletin of the Seismological Society of America (79) 581-609
We analyzed spectra of local microearthquakes recorded by the Anza, California, seismic network to isolate the effects of site response and to investigate the scaling of source parameters for small earthquakes. Spectra of microearthquakes (M < 2; Mo < 1019 dyne-cm) at Anza have shapes characteristic of the receiver sites...
Terrain, vegetation, and landscape evolution of the R4D research site, Brooks Range Foothills, Alaska
D.A. Walker, Emily F. Binnian, B. M. Evans, N.D. Lederer, E.A. Nordstrand, P.J. Webber
1989, Holarctic Ecology (12) 238-261
Maps of the vegetation and terrain of a 22 km2 area centered on the Department of Energy (DOE) R4D (Response, Resistance, Resilience to and Recovery from Disturbance in Arctic Ecosystems) study site in the Southern Foothills Physiographic Province of Alaska were made using integrated geobotanical mapping procedures and a geographic-information...
Impacts of petroleum development in the Arctic
Robertson S.B.
1989, Science (245) 764-765
In their article “Cumulative impacts of oil fields on northern Alaskan landscapes.” D. A. Walter et al. (1) document some direct and indirect impacts of petroleum development in the Arctic on selected portions of the Prudhoe Bay Oil field. While most of the kinds of impacts they discuss are valid...
New fault picture points toward San Francisco Bay area earthquakes
R. A. Kerr
1989, Earthquakes & Volcanoes (USGS) (21) 116-120
Recent earthquakes and a new way of looking at faults suggest that damaging earthquakes are closing in on the San Francisco area. Earthquakes Awareness Week 1989 in northern California started off with a bang on Monday, 3 April, when a magnitude 4.8 earthquake struck 15 kilometers northeast of San Jose....
Taking the pulse of the San Andreas Fault
R. A. Kerr
1989, Earthquakes & Volcanoes (USGS) (21) 112-115
The ninth of January, 1989, was the 32nd anniversary of the great southern California earthquake of 1857. the latest research shows that, on average, at least part of the section of the San Andreas fault that broke then should break again this year. But the same research suggests that the fault's...
Recruitment failure in American avocets and black-necked stilts nesting at Kesterson Reservoir, California, 1984-1985
M.L. Williams, R. L. Hothem, H. M. Ohlendorf
1989, Condor (91) 797-802
We evaluated recruitment by American Avocets (Recurvirostra americana) and Black-necked Stilts (Himantopus mexicanus) in 1984 and 1985 at the selenium-contaminated Kesterson Reservoir and at a nearby reference site, the Volta Wildlife Area, both in western Merced County, California. Nests were monitored to determine their outcomes, including hatching success, and...
Studies of geology and hydrology in the Basin and Range Province, southwestern United States, for isolation of high-level radioactive waste: Characterization of the Death Valley region, Nevada and California
Marion S. Bedinger, K. A. Sargent, W. H. Langer
1989, Professional Paper 1370-F
No abstract available....
Gas phase axial dispersion in a packed column oxygen absorber
Barnaby J. Watten, Claude E. Boyd
1989, Aquacultural Engineering (8) 421-434
Gas phase axial dispersion was characterized within an enclosed packed column receiving oxygen and water under counter-current flow conditions. Steady-state gas phase profiles (longitudinal) were measured during a series of 90 column runs in which, at each of three bed depths (0·362, 0·699, and 1·041 m), all combinations of the...
Nesting biology of pacific loons, Gavia pacifica, on the Yukon-Kuskokwim Delta, Alaska
Margaret R. Petersen
1989, Canadian Field-Naturalist (103) 265-269
The nesting biology of Pacific Loons, Gavia pacifica, was studied from 1973 to 1975 on the Yukon-Kuskokwim Delta, Alaska. Loons maintained territories on ponds throughout the pre-nesting period. Both adults incubated eggs and raised the young. Males incubated more than females during early incubation, and females more than males during...
Atlantic salmon brood stock management and breeding handbook
Harold L. Kincaid, Jon G. Stanley
1989, Biological Report 89(12)
Anadromus runs of Atlantic salmon have been restored to the Connecticut, Merrimack, Pawcatuck, Penobscot, and St. Croix rivers in New England by the stocking of more than 8 million smolts since 1948. Fish-breeding methods have been developed that minimize inbreeding and domestication and enhance natural selection. Methods are...
