Earthquakes
National Geophysical Data Center
1986, Report
An earthquake is the motion or trembling of the ground produced by sudden displacement of rock in the Earth's crust. Earthquakes result from crustal strain, volcanism, landslides, and collapse of caverns. Stress accumulates in response to tectonic forces until it exceeds the strength of the rock. The rock then breaks along a preexisting...
On tide-induced Lagrangian residual current and residual transport: 1. Lagrangian residual current
Shizuo Feng, Ralph T. Cheng, Xi Pangen
1986, Water Resources Research (22) 1623-1634
Residual currents in tidal estuaries and coastal embayments have been recognized as fundamental factors which affect the long-term transport processes. It has been pointed out by previous studies that it is more relevant to use a Lagrangian mean velocity than an Eulerian mean velocity to determine the movements of water...
Arctic National Wildlife Refuge land cover mapping project user's guide
Carl J. Markon
1986, Report
Section 1002 of the Alaska National Interest Lands Conservation Act of 1980 (ANILCA, 1980) requires the Secretary of Interior to conduct a continuing study of fish, wildlife, and habitats on the coastal plain of the Arctic National Wildlife Refuge (ANWR). Included in this study is a determination of the extent, location, and carrying capacity of...
On tide-induced Lagrangian residual current and residual transport: 2. Residual transport with application in south San Francisco Bay, California
Shizuo Feng, Ralph T. Cheng, Xi Pangen
1986, Water Resources Research (22) 1635-1646
The transports of solutes and other tracers are fundamental to estuarine processes. The apparent transport mechanisms are convection by tidal current and current-induced shear effect dispersion for processes which take place in a time period of the order of a tidal cycle. However, as emphasis is shifted toward the effects...
Evaluation of Alaskan wetlands for waterfowl
Calvin J. Lensink, Dirk V. Derksen
1986, Conference Paper, Alaska: Regional wetland functions: Proceedings of a workshop held at Anchorage, Alaska, May 28-29, 1986
Few studies have focused specifically on use of Alaskan wetlands by waterfowl. However, substantial information on the values of wetlands is available from studies on individual species or that were conducted for other purposes. Most investigators have found it most effective to classify habitat use on the basis of observed...
Preliminary inversions and principal facts for direct-current soundings, Kilauea Volcano, Hawaii
Dallas B. Jackson, Charles J. Zablocki, Jim Kauahikaua
1986, Open-File Report 87-56
No abstract available. ...
Hydrology of carbonate aquifers in southwestern Linn County and adjacent parts of Benton, Iowa, and Johnson Counties, Iowa
Kenneth Wahl, Bill J. Bunker
1986, Water Supply Bulletin 15
Groundwater is the major source of water in Linn County and the surrounding area. Approximately 90 percent of the groundwater production is from Silurian, Devonian, and Quaternary aquifers. The Silurian and Devonian aquifers consist of limestone and dolomite with minor shale beds, which have a regional dip to the southwest of...
Geology and geochemistry of the Deer Trail Pb-Zn-Ag-Cu manto deposits, Marysvale District, west-central Utah
D.W. Beaty, C. G. Cunningham, R.O. Rye, T. A. Steven, E. Gonzalez- Urien
1986, Economic Geology (81) 1932-1952
Strata-bound sulphide replacement bodies in the Deer Trail mine are sinuous pipes in carbonate beds, approximately localized by an anticlinal axis, and radiate from a fault across the lower part of the Permian Toroweap formation. Indistinct sericitic envelopes provide a K/Ar age of 14 m.y., correlative with barren, altered volcanic...
Influence of particle-size separation technique on concentrations of sediment-associated trace metals
G. F. Koltun, D.R. Helsel
1986, Conference Paper, Proceedings of Meetings of American Geophysical Union
No abstract available....
An oil spill and hazardous waste vulnerability modeling approach (Coastal Louisiana)
Floyd O. Stayner, James B. Johnston, James D. Scurry
1986, Conference Paper, Geographic information systems for environmental protection : A workshop
No abstract available....
Preserving coastal wetlands: A geographic information system's approach to resource management in the U.S. Fish and Wildlife Service
James D. Scurry, Floyd O. Stayner
1986, Conference Paper, Exemplary Systems in Government Awards, 1986
The use of electromagnetic methods to delineate vertical and lateral lithologic changes in glacial aquifers
F.P. Haeni
1986, Conference Paper, Proceedings of the Surface and Borehole Geophysical Methods and Ground Water Instrumentation Conference and Exposition
No abstract available....
Measuring the success of wetlands mitigation
Millicent L. Quammen
1986, National Wetlands Newsletter (8) 6-8
No abstract available....
Rock-water interaction in ash-flow tuffs (Yucca Mountain, Nevada, USA)- The record from uranium studies
Robert A. Zielinski, Charles A. Bush, R.W. Spengler, Barney J. Szabo
1986, Uranium (2) 361-386
Forty-eight core samples of ash-flow tuffs from Yucca Mountain, NV, were selected for comparative analysis by uranium-based methods to estimate past interaction with oxidizing water. Results aid in the selection of hydrologically isolated host rocks for radioactive waste disposal. U abundances were consistently more variable than thorium in whole rocks,...
Impact of time and climate on Quaternary soils in the Yucca Mountain area of the Nevada Test Site
Emily M. Taylor
1986, Thesis
No abstract available....
Data bases for use in fish and wildlife: Mitigation planning in Tampa Bay Florida: Project summary
William K. Fehring, Millicent L. Quammen
1986, NWRC Open File 86-6
No abstract available....
Sedimentology and clast orientations of the 18 May 1980 southwest- flank lahars, Mount St. Helens, Washington
Jon J. Major, B. Voight
1986, Journal of Sedimentary Petrology (691)
Three lahars that resulted from the flow transformation of an inflated pyroclastic surge caused by ejected lithic debris and hydrothermal water during the cataclysmic Mount St. Helens eruption of 18 May 1980 deposited about 1 x 106 m3 of massive, poorly sorted, poorly graded volcaniclastic sediment on the SW flank (SWF). Downflow changes in mean grain...
Cretaceous paleoceanography of the western North Atlantic Ocean
Michael A. Arthur, Walter E. Dean
1986, Book chapter, The Western North Atlantic Region
In this paper we summarize available information on the Cretaceous lithostratigraphy and paleoceanography of the western North Atlantic. The data and some of our interpretations draw in large part on papers published in the Deep Sea Drilling Project (DSDP) volumes. We have attempted to cite relevant references when possible, but...
Morphology and age of fault scarps in the Rio Grande Rift, south-central Colorado
Steven M. Colman, William P. Rogers, R. M. Kirkham
William P. Rogers, Robert M. Kirkham, editor(s)
1986, Report, Contributions to Colorado Seisrnicity and Tectonics: A 1986 Update
Fault scarps in the Rio Grande rift of Colorado provide most of the evidence of paleoseismicity in the state, and are thus a major focus of assessments of earthquake hazards. Critical components of such assessments are the ages of past faulting events; age control is scarce and generally coarse for...
Significance of Klamath rocks between the Franciscan Complex and Coast Range ophiolite, northern California
A. S. Jayko, Blake, R.N. Brothers
1986, Tectonics (5) 1055-1071
Small fault‐bounded slabs of low‐grade (prehnite‐pumpellyite‐bearing) slate, metagraywacke, and greenstone occur between the Coast Range ophiolite and South Fork Mountain Schist for at least 60 km south of the Klamath Mountains, northern California. The metagraywacke slabs differ from typical Franciscan Complex metagraywacke to the west by the absence of blueschist‐facies...
Tectonic evolution of Northwest California and Southwest Oregon
M. Clark Blake Jr., Angela S. Jayko
1986, Bulletin de la Société Géologique de France (11) 921-930
Tectonostratigraphic terrances in northwest California and southwest Oregon record a complex history of subduction, collision, and transform faulting. During the late Jurassic Nevadan orogeny, the Elder Creek-Snow Camp and western Klamath terranes were imbricated during collision of an island-arc system with the continental margin. Subsequent collisions are recorded in the...
Organochlorine chemical residues in bluegills and common carp from the irrigated San Joaquin Valley floor, California
Michael K. Saiki, Christopher J. Schmitt
1986, Archives of Environmental Contamination and Toxicology (15) 357-366
Samples of bluegills (Lepomis macrochirus) and common carp (Cyprinus carpio) collected from the San Joaquin River and two tributaries (Merced River and Salt Slough) in California were analyzed for 21 organochlorine chemical residues by gas chromatography to determine if pesticide contamination was confined to downstream sites...
Blueschist metamorphism of the Eastern Franciscan belt, northern California
A. S. Jayko, M.C. Blake Jr., R.N. Brothers
1986, GSA Memoirs 164
Rocks of the Eastern Franciscan belt, northern California, are divided into two tectonostratigraphic terranes metamorphosed to the blueschist facies, both with a distinct lithologic association and deformational history. The easternmost terrane, the Pickett Peak terrane of Early Cretaceous isotopic age, consists of crenulated mica schist and gneissic to schistose metagraywacke,...
Resource potential of the western North Atlantic Basin
William P. Dillon, Frank T. Manheim, L.F. Jansa, Gudmundur Palmason, Brian E. Tucholke, Richard S. Landrum
1986, Book chapter, Geology of North America: The Western North Atlantic Region
We here consider the petroleum resources only of the off shelf portion of the western North Atlantic Ocean. Very little information is available for this region; off the eastern United States, only four petroleum exploration holes have been drilled in one restricted area seaward of the shelf, off the Baltimore...
Regional correlation of Grande Ronde basalt flows, Columbia River basalt group, Washington, Oregon, and Idaho (USA)
Margaret T. Mangan, Thomas L. Wright, Don Swanson, G. R. Byerly
1986, GSA Bulletin (97) 1300-1318
The tholeiitic flood basalts of the Columbia River Basalt Group of middle and late Miocene age cover more than 200,000 km2 in Washington, Oregon, and Idaho. The most voluminous formation of the Group, the Grande Ronde Basalt, erupted for 2 m.y. from north-northwest-trending fissure systems concentrated in southeast Washington and adjacent...
