Sedimentary processes on the Atlantic Continental Slope of the United States
Harley J. Knebel
1984, Marine Geology (61) 43-74
Until recently, the sedimentary processes on the United States Atlantic Continental Slope were inferred mainly from descriptive studies based on the bathymetry and on widely spaced grab samples, bottom photographs, and seismic-reflection profiles. Over the past 6 years, however, much additional information has been collected on the bottom morphology, characteristics...
Offshore exploration and industry change: The case of the Gulf of Mexico
Emil D. Attanasi, L. J. Drew
1984, Journal of Petroleum Technology (36) 437-442
This paper considers industry structure and the exploration performance (by size class of operator) of firms searching for oil and gas in the U.S. Gulf of Mexico. It also tracks the changes in industry structure that have occurred in response to a decline in the quality of remaining prospects in...
Age of the Comfort Member of the Castle Hayne Formation, North Carolina
J. E. Hazel, Laurel M. Bybell, Lucy E. Edwards, G. D. Jones, L. W. Ward
1984, GSA Bulletin (95) 1040-1044
The biostratigraphic and chronostratigraphic position of the Comfort Member of the Castle Hayne Formation has been the subject of much debate. At the Martin-Marietta Quarry at Castle Hayne, New Hanover County, North Carolina, the planktic foraminifers indicate an assignment within an interval of the uppermost Turborotalia frontosa Zone to the Turborotalia pomeroli Zone. The...
Sinking of volcanic ash in uncompacted sediment in Williams Lake, Washington
R.Y. Anderson, E.B. Nuhfer, W.E. Dean
1984, Science (225) 505-508
Volcanic ash from the eruption of Mount St. Helens on 18 May 1980 fell into Williams Lake in eastern Washington and was temporarily suspended at the sediment-water interface. After several months of compaction, the ash layer broke up and sank into lower density uncompacted lake sediment. Stratigraphic time displacements of...
Shoreface translation and the Holocene stratigraphic record: Examples from Nova Scotia, the Mississippi Delta and eastern Australia
Ron Boyd, S. Penland
1984, Marine Geology (60) 391-412
Classic descriptive models of barrier sedimentation have been developed with data from the Atlantic and Gulf coasts of the United States. These models are dominated by low to moderate rates of relative sea level (RSL) rise and wave energy. Barriers respond by landward recycling of sediment through the mechanism of...
Movements of translocated wolves in Minnesota
Steven H. Fritts, W.J. Paul, L.D. Mech
1984, Journal of Wildlife Management (48) 709-721
From Feb. 1975-May 1978, 104 wolves (Canis lupus) captured at or near Minnesota farms where depredations on livestock had been reported were translocated northward and eastward for 50-317 km into extensive forests; 3 others were released westward. Nine wolves were translocated twice, and 1 three times. Information on movements was...
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...
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....
Discovery of two new large submarine canyons in the Bering Sea
Paul R. Carlson, Herman A. Karl
1984, Marine Geology (56) 159-179
The Beringian continental margin is incised by some of the world's largest submarine canyons. Two newly discovered canyons, St. Matthew and Middle, are hereby added to the roster of Bering Sea canyons. Although these canyons are smaller and not cut back into the Bering shelf like the five very large...
Recent studies indicate that major structures in northeastern Nevada and the Golconda thrust in north-central Nevada are of Jurassic or Cretaceous age
Keith B. Ketner
1984, Geology (12) 483-486
Geologic mapping recently completed in four areas of northeastern Nevada indicates that major folds and thrusts are of post-Early Triassic age and probably are Jurassic or Cretaceous. Previously published data for northeastern Nevada lead to, or permit, the same conclusion. Basinal deposits of Early Triassic age in the northern Adobe...
A seismic refraction survey of the Imperial Valley Region, California
Gary S. Fuis, Walter D. Mooney, J. H. Healy, G. A. McMechan, W. J. Lutter
1984, Journal of Geophysical Research B: Solid Earth (89) 1165-1189
The U.S. Geological Survey conducted an extensive seismic refraction survey in the Imperial Valley region of California in 1979. The Imperial Valley is located in the Salton Trough, an active rift between the Pacific and North American plates. Forty shots fired at seven shot points were recorded...
Red fox predation on breeding ducks in midcontinent North America
Alan B. Sargeant, Stephen H. Allen, Robert T. Eberhardt
1984, Wildlife Monograph 89
Red fox (Vulpes vulpes) predation on nesting ducks was assessed by examining 1,857 adult duck remains found at 1,432 fox rearing dens from 1968 to 1973. Dabbling ducks were much more vulnerable to foxes than diving ducks. Dabbling ducks (1,798) found at dens consisted of 27% blue-winged teals (Anas discors),...
Modification of wave-cut and faulting-controlled landforms
Thomas C. Hanks, R.C. Bucknam, K. R. Lajoie, R. E. Wallace
1984, Journal of Geophysical Research Solid Earth (89) 5771-5790
From a casual observation that the form of degraded fault scarps resembles the error function, this investigation proceeds through an elementary diffusion equation representation of landform evolution to the application of the resulting equations to the modern topography of scarplike landforms. The morphologic observations can be analyzed either in the...
Avian cholera in Nebraska's Rainwater Basin
Ronald M. Windingstad, J. J. Hurt, A. K. Trout, J. Cary
1984, Transactions of the North American Wildlife and Natural Resources Conference (49) 576-583
The first report of avian cholera in North America occurred in northwestern Texas in winter 1944 (Quortrup et al. 1946). In 1975, mortality from avian cholera occurred for the first time in waterfowl in the Rainwater Basin of Nebraska when an estimated 25,000 birds died (Zinkl et al. 1977). Avian...
Earthquakes; September-October 1983
W. J. Person
1984, Earthquake Information Bulletin (USGS) (16) 148-151
Two major earthquakes (magntidue 7.0-7.9) occurred during the month of October. The first was on October 4 in northern Chile. the second occurred in the United States in the State of Idaho on October 28. This was the first major earthquake in the conterminous United States since a magnitude 7.2...
Statistical summaries of streamflow data in Oregon; Volume 1, eastern Oregon
John Friday, S. J. Miller
1984, Open-File Report 84-454
Statistical summaries of streamflow data at 335 streamgaging sites are presented in this two volume report to aid in appraising the hydrology of river basins in Oregon. Records for 31 gaging stations were compiled into separate periods owing to changes in regulation during the period of data collection. The periods...
Geomorphic domains and linear features on Landsat images, Circle quadrangle, Alaska
S. L. Simpson
1984, Open-File Report 83-170-E
A remote sensing study using Landsat images was undertaken as part of the Alaska Mineral Resource Assessment Program (AMRAP). Geomorphic domains A and B, identified on enhanced Landsat images, divide Circle quadrangle south of Tintina fault zone into two regional areas having major differences in surface characteristics. Domain A is...
Lithostratigraphy of Upper Ordovician strata exposed in Kentucky, with a section on biostratigraphy
Gordon Whitney Weir, Warren Lee Peterson, W. C. Swadley, John Pojeta Jr.
1984, Professional Paper 1151-E
Ordovician formations above the Lexington Limestone crop out in the Blue Grass region of Kentucky and along the Cumberland River and its tributaries. The formations are all conformable and in places intertongue and intergrade. The major Ordovician units above the Lexington Limestone in the Blue Grass region are: The Clays...
Preliminary map showing the difference between the potentiometric surfaces of the Aquia aquifer of April 1979 and September 1982 in southern Maryland
F. K. Mack, J. C. Wheeler, S. E. Curtin
1984, Open-File Report 83-930
A map was prepared that shows the net change in the potentiometric surface of the Aquia aquifer in southern Maryland between April 1979 and September 1983. During this period, the potentiometric surface declined (1) at least a few feet throughout the entire southern Maryland area, and (2) more than 10...
Water-table contour map of the carbonate rocks of eastern Chester County, Pennsylvania, October 1983
Ronald A. Sloto
1984, Open-File Report 84-235
No abstract available...
Geochemical assessment of mineral resources in the Goshute Canyon Survey Area (NV 040-015), east-central Nevada
R. E. Tucker, G.W. Day, Christopher Goodhue
1984, Open-File Report 84-101
No abstract available....
Long-term observations of bottom conditions and sediment movement on the Atlantic continental shelf; time-lapse photography from instrumented tripod
Bradford Butman, Cynthia G. Bryden, Stephanie L. Pfirman, William J. Strahle, Marlene A. Noble
1984, Conference Paper
An instrument system that measures bottom current, temperature, light transmission, and pressure, and that photographs the bottom at 2- to 6-hour intervals has been developed to study sediment transport on the Atlantic Continental Shelf. Instruments have been deployed extensively along the United States East Coast Continental Shelf for periods of...
The Kingak shale of northern Alaska—regional variations in organic geochemical properties and petroleum source rock quality
Leslie B. Magoon, George E. Claypool
1984, Organic Geochemistry (6) 533-542
The Kingak Shale, a thick widespread rock unit in northern Alaska that ranges in age from Early Jurassic through Early Cretaceous, has adequate to good oil source rock potential. This lenticular-shaped rock unit is as much as 1200 m thick near the Jurassic shelf edge, where its present-day burial depth...
Lithotectonic assemblages as portrayed on the new bedrock geologic map of Massachusetts.
Norman L. Hatch Jr., E-An Zen, Richard Goldsmith, Nicholas M. Ratcliffe, Peter Robinson, Rolfe S. Stanley, David R. Wones
1984, American Journal of Science (284) 1026-1034
Scale of 1:250,000. The map units are grouped into eight lithotectonic packages. Five "zones" of older rocks that cover the whole state are, from west to east, the Taconic-Berkshire, Rowe-Hawley, Bronson Hill, Nashoba, and Milford-Dedham. In central and western Massachusetts, these zones are overlain by the Connecticut Valley and Merrimack...
Ferromanganese nodules from MANOP Sites H, S, and R-Control of mineralogical and chemical composition by multiple accretionary processes
J. Dymond, M. Lyle, B. Finney, D.Z. Piper, K. Murphy, R. Conard, N. Pisias
1984, Geochimica et Cosmochimica Acta (48) 931-949
The chemical composition of ferromanganese nodules from the three nodule-bearing MANOP sites in the Pacific can be accounted for in a qualitative way by variable contributions of distinct accretionary processes. These accretionary modes are:1.(1) hydrogenous, i.e., direct precipitation or accumulation of colloidal metal oxides in seawater,2.(2)...
