Seismic stratigraphy and late Quaternary shelf history, south-central Monterey Bay, California
J. L. Chin, H.E. Clifton, H.T. Mullins
1988, Marine Geology (81) 137-157
The south-central Monterey Bay shelf is a high-energy, wave-dominated, tectonically active coastal region on the central California continental margin. A prominent feature of this shelf is a sediment lobe off the mouth of the Salinas River that has surface expression.High-resolution seismic-reflection profiles reveal that an angular...
Analytical approach to calculation of response spectra from seismological models of ground motion
Erdal Safak
1988, Earthquake Engineering and Structural Dynamics (16) 121-134
An analytical approach to calculate response spectra from seismological models of ground motion is presented. Seismological models have three major advantages over empirical models: (1) they help in an understanding of the physics of earthquake mechanisms, (2) they can be used to predict ground motions for future earthquakes and (3)...
Paleoseismicity and neotectonics of the Cordillera Blanca fault zone, northern Peruvian Andes
David P. Schwartz
1988, Journal of Geophysical Research Solid Earth (93) 4712-4730
The Cordillera Bianca fault zone is a major west dipping normal fault that bounds the west side of a 120- to 170-km-wide zone of active extension along the crest of the northern Peruvian Andes. The fault is approximately 210 km long and exhibits continuous geomorphic evidence of repeated late Pleistocene...
Taolin Zn-Pb-fluorite deposit, People's Republic of China: An example of some problems in fluid inclusion research on mineral deposits
E. Roedder, K.W. Howard
1988, Journal of the Geological Society (145) 163-174
The large Taolin zinc–lead–fluorite deposit in the People’s Republic of China was discovered 28 years ago, but whether its genetic affiliation is Mississippi Valley-type, epithermal, or mesothermal has remained uncertain. Both the ore and gangue (cherty to coarse quartz, plus barite, chlorite and calcite) occur as open space filling in...
Making maps with computers
S.C. Guptill, L.E. Starr
1988, American Scientist (76) 136-142
Soon after their introduction in the 1950s, digital computers were used for various phases of the mapping process, especially for trigonometric calculations of survey data and for orientation of aerial photographs on map manuscripts. In addition, computer-controlled plotters were used to draw simple outline maps. The process of collecting data...
The northeastern Ohio earthquake of 31 January 1986: Was it induced?
C. Nicholson, E. Roeloffs, R. L. Wesson
1988, Bulletin of the Seismological Society of America (78) 188-217
On 31 January 1986, at 11:46 EST, an earthquake of mb = 5.0 occurred about 40 km east of Cleveland, Ohio, and about 17 km south of the Perry Nuclear Power Plant. The earthquake was felt over a broad area, including 11 states, the District of Columbia, and parts of...
Paleomagnetic constraints on rotation within Mount Abbot quadrangle, central Sierra Nevada, California
Stephanie L. Ross
1988, Journal of Geophysical Research B: Solid Earth (93) 11711-11720
The regional photolineament pattern in Mount Abbot quadrangle in the central Sierra Nevada is sigmoidal in plan view. The fractures in the southwest section of the quadrangle, near Florence Lake, strike N10°–20°E, while those in the central section, along Bear Creek, strike N50°–70°E and those in the northeast strike N25°–40°E....
Distribution and mobility of selenium and other trace elements in shallow groundwater of the western San Joaquin Valley, California
S. J. Deverel, S.P. Milliard
1988, Environmental Science & Technology (22) 697-702
Samples of shallow groundwater that underlies much of the irrigated area in the western San Joaquin Valley, CA, were analyzed for various major ions and trace elements, including selenium. Concentrations of the major ions generally were similar for groundwater collected in the two primary geologic zones - the alluvial fan...
Migration of historical earthquakes in California
C.-Y. King, Z. Ma
1988, Pure and Applied Geophysics PAGEOPH (127) 627-639
Most large earthquakes of magnitude ???6.0 in California during 1852-1987 appear to show a southeast-to-northwest tendency of epicenter migration. This finding is consistent with earlier findings of Savage (1971) for a relatively few large earthquakes along the west coast of North America, and of Wood and Allen (1973) for smaller...
A New Species of Pulvinites (Mollusca: Bivalvia) from the Upper Paleocene Paspotansa Member of the Aquia Formation in Virginia
L. W. Ward, T.R. Waller
1988, Journal of Paleontology (62) 51-55
Pulvinites lawrencei n.sp. is described from the upper Paleocene (Landenian Stage) Paspotansa Member of the Aquia Formation in Stafford County, Virginia. This is the first report of a member of the pteriacean family Pulvinitidae in the Tertiary on either side of the Atlantic, the only other post-Mesozoic records of Pulvinites...
List of major natural disasters, 1960-1987
G. Berz
1988, Earthquakes & Volcanoes (USGS) (20) 226-228
What was that?
F. M. Anglin, R. A. W. Haddon
1988, Earthquakes & Volcanoes (USGS) (20) 161-166
At 4:20 local time on September 19, 1986, Mrs. Laurie Harder saw a meteor passing across the sky above her home in Yellowknife, N.W.T. She reported her observation to Yellowknife Seismic Station staff who examined the records of the Yellowknife seismic array to see if the associated meteoroid had hit...
Use of aerial photography to inventory aquatic vegetation
Donald W. Schloesser, Charles L. Brown, Bruce A. Manny
1988, Journal of Aerospace Engineering (1) 142-150
This study demonstrates the feasibility of using low-altitude aerial photography to inventory submersed macrophytes in the connecting channels of the Great Lakes. For this purpose, we obtained aerial color transparencies and collateral ground truth information about submersed vegetation at 160 stations within four study sites in the St. Clair and...
The stress heat-flow paradox and thermal results from Cajon Pass
A.H. Lachenbruch, J.H. Sass
1988, Geophysical Research Letters (15) 981-984
Conventional friction models predict a substantial thermal anomaly associated with active traces of strike-slip faults, but no such anomaly is observed from over 100 heat-flow determinations along 1,000 km of the San Andreas fault. The Cajon Pass well is being drilled to bring deep heat-flow and...
Calibration of water-velocity meters
William R. Kaehrle, James E. Bowie
1988, Conference Paper
The U.S. Geological Survey, Department of the Interior, as part of its responsibility to appraise the quantity of water resources in the United States, maintains facilities for the calibration of water-velocity meters at the Gulf Coast Hydroscience Center's Hydraulic Laboratory Facility, NSTL, Mississippi. These meters are used in hydrologic studies...
MAGMIX: a basic program to calculate viscosities of interacting magmas of differing composition, temperature, and water content
T. P. Frost, J.R. Lindsay
1988, Computers & Geosciences (14) 213-228
MAGMIX is a BASIC program designed to predict viscosities at thermal equilibrium of interacting magmas of differing compositions, initial temperatures, crystallinities, crystal sizes, and water content for any mixing proportion between end members. From the viscosities of the end members at thermal equilibrium, it is possible to predict the styles...
Chemical characteristics of prairie lakes in south-central North Dakota--their potential for influencing use by fish and wildlife
G.A. Swanson, T. C. Winter, V. A. Adomaitis, James W. LaBaugh
1988, Technical Report 18
No abstract available....
Applications of satellite telemetry to wildlife research and management in Alaska
S.G. Fancy, R.B. Harris, David C. Douglas, L.F. Pank, Kenneth R. Whitten, Thomas R. McCabe, Steven C. Amstrup, G.W. Garner
1988, Conference Paper, Acte du colloque international: Suivi des vertebres terrestres par radiotelemetrie
Since 1984, the Alaska Fish and Wildlife Research Center, in cooperation with the Alaska Department of Fish and Game and several other agencies, has used the Argos Data Collection and Location System to address wildlife research and management problems in Alaska and other parts of North America. The use of...
The representativeness of pore water samples collected from the unsaturated zone using pressure-vacuum lysimeters
Charles A. Peters, Richard W. Healy
1988, Ground Water Monitoring Review (8) 96-101
Pressure-vacuum lysimeters are an inexpensive means of collecting numerous water samples from the same location in the unsaturated zone over a period of time. However, prior studies have indicated that the chemistry of water samples may be altered by the collection technique, creating concern about the representativeness of the pore...
Petrology of ultramafic xenoliths from Loihi Seamount, Hawaii
D.A. Clague
1988, Journal of Petrology (29) 1161-1186
Ultramafic xenoliths were recovered in four alkalic lava flows from Loihi Seamount at depths between 2200 and 1400m. No xenolith bearing flows were sampled near the summit despite a concentrated dredge program. The flows, three of alkalic basalt and one of basanite, contain common olivine megacrysts and small xenoliths...
Effects of sulfur dioxide emissions on stream chemistry in the western United States
K. Campbell, J.T. Turk
1988, Water Resources Research (24) 871-878
A 20-year record of water chemistry for seven headwater streams in the Rocky Mountain region of the western United States is compared to estimates of local and regional sulfur dioxide emissions for the same period. Emissions from smelters in the region comprise a significant part of sulfur dioxide emissions for...
A tentative protocol for measurement of radon availability from the ground
A.B. Tanner
1988, Radiation Protection Dosimetry (24) 79-83
A procedure is being tested in order to determine its suitability for assessing the intrinsic ability of the ground at a particular site to supply 222Rn to a basement structure to be built on the site. Soil gas is sucked from a borehole probe through an alpha scintillation chamber and flow...
Microbial oxidation of pyrrhotites in coal chars
K.W. Miller, J.B. Risatti
1988, Fuel (67) 1150-1154
The ability of Thiobacillus ferrooxidans to oxidize pyrrhotite minerals occurring in coal chars was investigated, to evaluate the feasibility of microbial char desulphurization. Bio-oxidation of pyrrhotites in chars produced by two different processes was demonstrated conclusively. Microbial removal of sulphur from a char and its parent coal proceeded at the rate of...
Geologic evidence for a magma chamber beneath Newberry Volcano, Oregon
N. S. MacLeod, D. R. Sherrod
1988, Journal of Geophysical Research Solid Earth (93) 10067-10079
At Newberry Volcano, central Oregon, more than 0.5 m.y. of magmatic activity, including caldera collapse and renewed caldera-filling volcanism, has created a structural and thermal chimney that channels magma ascent. Holocene rhyolitic eruptions (1) have been confined mainly within the caldera in an area 5 km in diameter, (2) have...
Seasonal occurrence of migrant whimbrels and bristle-thighed curlews on the Yukon-Kuskokwim Delta, Alaska
Colleen M. Handel, Christian P. Dau
1988, The Condor (90) 782-790
Migrant Whimbrels (Numenius phaeopus) and Bristle-thighed Curlews (N. tahitiensis) were recorded during five summers along coastal tundra of the Yukon-Kuskokwim Delta, Alaska. From June to September, 1975-1979, 358 flocks totalling 1,265 curlews were observed; an additional 54 flocks were identified by vocalization alone. Among the 359 flocks identified to species,...
