The 1984 Morgan Hill, California, earthquake
W. H. Bakun, M. M. Clark, R.S. Cockerham, W.L. Ellsworth, A.G. Lindh, W.H. Prescott, A.F. Shakal, P. Spudich
1984, Science (225) 288-291
The Morgan Hill, California, earthquake (magnitude 6.1) of 24 April 1984 ruptured a 30-kilometer-long segment of the Calaveras fault zone to the east of San Jose. Although it was recognized in 1980 that an earthquake of magnitude 6 occurred on this segment in 1911 and that a repeat of this...
Larval dermestid beetles feeding on nestling snail kites, wood storks, and great blue herons
N.F.R. Snyder, J.C. Ogden, J.D. Bittner, G.A. Grau
1984, Condor (86) 170-174
In recent years abdominal lesions attributable to larval dermestid beetles (Dermestes nidum) have appeared in nestling Snail (Everglade) Kites (Rostrhamus sociabilis), Wood Storks (Mycteria americana), and Great Blue Herons (Ardea herodias). Although it appears that most nestlings affected have survived, the degree of threat posed by dermestid larvae to various...
Pesticide, PCB, and lead residues and necropsy data for bald eagles from 32 states - 1978-81
W. L. Reichel, Shelia K. Schmeling, E. Cromartie, T. E. Kaiser, A. J. Krynitsky, T. G. Lamont, B.M. Mulhern, R. M. Prouty, C. J. Stafford, D. M. Swineford
1984, Environmental Monitoring and Assessment (4) 395-403
In 1978–81, 293 bald eagles (Haliaeetus leucocephalus) from 32 states were necropsied and analyzed for organochlorine pesticides, polychlorinated biphenyls (PCB), and lead residues. DDE was found in all carcasses; PCB, DDD, trans-nonachlor, dieldrin and oxychlordane were next in order of percent frequency of detection. The median...
Effects of heptachlor- and lindane-treated seed on Canada geese
L. J. Blus, Charles J. Henny, D.J. Lenhart, T. E. Kaiser
1984, Journal of Wildlife Management (48) 1097-1111
A study of Canada geese (B. canadensis) was conducted in the Pacific Northwest from 1978 through 1981. Lowered reproductive success, mortality of adults, and a population decline of resident western Canada geese (B. c. moffitti) at the Umatilla National Wildlife Refuge (Umatilla NWR) Oregon and Washington [USA] were associated with...
Contaminants in wood stork eggs and their effects on reproduction, Florida, 1982
W. James Fleming, J.A. Rodgers Jr., C. J. Stafford
1984, Colonial Waterbirds (7) 88-93
One egg was removed from five Wood Stork (Mycteria americana) nests at each of eight colonies in central and northern Florida in 1982. DDE and mercury were present in all eggs with concentrations ranging up to 9.4 and 0.73 ppm wet weight, respectively. PCBs were detected in 25 eggs (63%)...
Brain cholinesterase activity in fledgling starlings: Implications for monitoring exposure of songbirds to ChE inhibitors
C.E. Grue, C.C. Hunter
1984, Bulletin of Environmental Contamination and Toxicology (32) 282-289
Exposure of songbirds to organophosphate and carbamate pesticides is often determined by comparing the brain cholinesterase (ChE) activity of individuals that have been exposed with that of unexposed birds of the same species (e.g., see Busby et al. 1981, 1982; Hamilton et al. 1981). Knowledge of the normal pattern of...
Areal lithologic changes in bedrock aquifers in southeastern Minnesota as determined from natural-gamma borehole logs methods
D. G. Woodward
1984, Conference Paper
Sedimentary rocks of Paleozoic age in the Hollandale embayment in southeastern Minnesota are as much as 2,000 feet thick and, with the underlying Hinckley sandstone of Proterozoic age, comprise the following five layered aquifers (beginning with the oldest): the Mount Simon-Hinckley, Ironton-Galesville, Prairie du Chien-Jordan, St. Peter and Upper Carbonate....
The study of buried drift aquifers in Minnesota by seismic geophysical methods
D. G. Woodward
1984, Report
Buried-drift aquifers are stratified sand and (or) gravel aquifers in glacial deposits that cannot be seen or inferred at the land surface. During the Pleistocene Epoch, four continental glaciations advanced and retreated across Minnesota, blanketing the bedrock surface with drift as much as 700 feet thick (fig. 1). Most of...
Geology of the Precambrian rocks and rocks of the northern Harrat Hutaymah volcanic field, Baq'a quadrangle, sheet 27F, Kingdom of Saudi Arabia
Karl S. Kellogg, Saudi Arabia. Deputy Ministry for Mineral Resources, U.S. Geological Survey Saudi Arabia Mission
1984, Report
Ar40/Ar39 age spectrum dating of biotite from Middle Ordovician bentonites, eastern North America
Michael J. Kunk, John F. Sutter
1984, Book chapter, Aspects of the ordovician system
No abstract available. ...
Precipitation and streamflow data - Collections techniques
R. G. Brown
1984, Conference Paper, Understanding Watershed and Lake Management Conference, Bloomington, Minnesota, March 23, 1984 [Proceedings]
No abstract available....
Monitoring range utilization on the Crow Creek Indian Reservation
R. H. Haas, D. C. Johnston
1984, Report
No abstract available....
Pennsylvania gazetteer of streams: Part II
L. C. Shaw
1984, Water Resources Bulletin 16
No abstract available....
Time-domain reflectometry: Simultaneous measurement of soil water content and electrical conductivity with a single probe
F.N. Dalton, W.N. Herkelrath, D.S. Rawlins, J.D. Rhoades
1984, Science (224) 989-990
Two parallel metallic rods were used as a wave guide to measure the dielectric constant and electrical conductivity of soils having different electrical conductivities but the same water content. Measurements showed that the two parameters were sufficiently independent to permit simultaneous determinations of water content and bulk electrical conductivity....
Tertiary marine pelecypods of California and Baja California; Propeamussiidae and Pectinidae
Ellen James Moore
1984, Professional Paper 1228-B
No abstract available....
Reply [to “Comment on ‘Identifying sources of groundwater pollution: An optimization approach’ by Steven M. Gorelick, Barbara Evans, and Irwin Remson”]
Steven M. Gorelick, Barbara Evans, Irwin Remson
1984, Water Resources Research (20) 745-745
No abstract available....
Mineralogic evidence for an impact event at the Cretaceous-Tertiary boundary
B.F. Bohor, E.E. Foord, P.J. Modreski, Don M. Triplehorn
1984, Science (224) 867-869
A thin claystone layer found in nonmarine rocks at the palynological Cretaceous-Tertiary boundary in eastern Montana contains an anomalously high value of iridium. The nonclay fraction is mostly quartz with minor feldspar, and some of these grains display planar features. These planar features are related to specific crystallographic directions in...
Seismic potential revealed by surface folding: 1983 Coalinga, California, earthquake
R.S. Stein, G.C.P. King
1984, Science (224) 869-872
The 2 May 1983 Coalinga, California, earthquake (magnitude 6.5) failed to rupture through surface deposits and, instead, elastically folded the top few kilometers of the crust. The subsurface rate of fault slip and the earthquake repeat time are estimated from seismic, geodetic, and geologic data. Three larger earthquakes (up to...
Brief comparison of some technological and environmental aspects of large-scale surface and underground mining of oil shale, Piceance Creek Basin, Colorado
G.A. Miller, John R. Dyni, D.R. Dietz
1984, Conference Paper, 17th oil shale symposium proceedings
Comparison of several aspects of surface and underground methods of mining for large-scale oil shale extraction in the Piceance Creek Basin suggests that surface mining techniques may have several advantages over underground methods. For a production level of one million barrels of shale oil per day,...
A seismic refraction study of the Oregon Cascades
Donald S. Leaver, Walter D. Mooney, W.M. Kohler
1984, Journal of Geophysical Research B: Solid Earth (89) 3121-3134
A 275‐km‐long reversed refraction profile in the Oregon Cascades, two shallow earthquakes of magnitude 5 in southern Washington, a shallow earthquake of magnitude 4.6 in northern California, and a previously published analysis of the Bouguer gravity field are used to develop a crustal P wave velocity model for the...
Effects of an urban wetland on sediment and nutrient loads in runoff
R. G. Brown
1984, Wetlands (4) 147-158
An urban wetland in the Minneapolis-St. Paul Metropolitan Area was found to retain sediment and nutrient loads in runoff routed through the wetland. Sediment and nutrient loads in runoff were measured during 1982 at the inlet and outlet of the 6.4-bectare urban wetland. Comparison of annual loads entering and...
Interlaminated ice-proximal glacimarine sediments in Muir Inlet, Alaska
N.E. Mackiewicz, R.D. Powell, P.R. Carlson, Bruce F. Molnia
1984, Marine Geology (57) 113-147
Muir Inlet in Glacier Bay, Alaska, is a glacial fjord receiving a tremendous volume of sediment annually. The rate of sediment accumulation is greatest proximal to Muir Glacier (about 9 m yr−1) and decreases away from the glacier. The primary sediment sources are meltwater streams discharging at subglacial and ice-marginal...
Significance of biomass and light availability to phytoplankton productivity in San Francisco Bay
Brian E. Cole, James E. Cloern
1984, Marine Ecology Progress Series (17) 15-24
Primary productivity was measured monthly at 6 sites within San Francisco Bay, USA, throughout 1980. The 6 sites were chosen to represent a range of estuarine environments with respect to salinity, phytoplankton community composition, turbidity, and water depth. Annual net production over the photic zone ranged from 95 to 150...
Ancient ice islands in salt lakes of the Central Andes
S. H. Hurlbert, Cecily C.Y. Chang
1984, Science (224) 299-302
Massive blocks of freshwater ice and frozen sediments protrude from shallow, saline lakes in the Andes of southwestern Bolivia and northeastern Chile. These ice islands range up to 1.5 kilometers long, stand up to 7 meters above the water surface, and may extend out tens of meters and more beneath...
Multiple microtektite horizons in upper eocene marine sediments?
B.P. Glass
1984, Science (224) 309-310
No abstract available....
