Origin and geochemistry of Cretaceous deep-sea black shales and multicolored claystones, with emphasis on Deep Sea Drilling Project Site 530, southern Angola Basin
Walter E. Dean, M.A. Arthur, D.A.V. Stow
1984, Initial Reports of the D.S.D.P. (75) 819-844
Deep-water sedimentary sequences of mid-Cretaceous age, rich in organic carbon, have been recovered at many DSDP sites in the Atlantic Ocean. Most of these sequences have a marked cyclicity in amount of organic carbon resulting in interbedded multicolored shale, marlstone, and (or) limestone that have cycle periods of 20,000 to...
Models for the deposition of Mesozoic-Cenozoic fine-grained organic-carbon-rich sediment in the deep sea
M.A. Arthur, Walter E. Dean, D.A.V. Stow
1984, Geological Society of London Special Publications (15) 527-560
The widespread occurrence of organic-carbon-rich strata (‘black shales’) in certain portions of Jurassic, Cretaceous and Cenozoic sequences has been well-documented from Deep Sea Drilling Project sites in the Atlantic and Pacific Oceans and from sequences, now exposed on land, originally deposited in the Tethyan ocean. These ancient black shales...
Evaluation of potential embryotoxicity and teratogenicity of 42 herbicides, insecticides, and petroleum contaminants to mallard eggs
David J. Hoffman, Peter H. Albers
1984, Archives of Environmental Contamination and Toxicology (13) 15-27
Results are reported for the embryotoxicity of 42 environmental contaminants applied externally to mallard (Anas platyrhynchos) eggs including crude and refined petroleum, and commercial formulations of herbicides and insecticides. Many of the petroleum pollutants were embryotoxic and moderately teratogenic and had LD50s of 0.3 to 5 μl per egg (∼6–90 μg/g...
Significant unconformities and the hiatuses represented by them in the Paleogene of the Atlantic and Gulf Coastal Province
Joseph E. Hazel Jr., Lucy E. Edwards, Laurel M. Bybell
1984, Book chapter, Interregional unconformities and hydrocarbon accumulation
A biostratigraphic, chronostratigraphic, and magnetostratigraphic model has been calibrated to produce a new time scale for the Paleogene. The model gives the biostratigraphic position and duration represented by significant unconformities in three areas of the Atlantic and Gulf Coastal Province: 1) western and central Alabama; 2) South Carolina; and 3)...
A hierarchical model to organize integrated research on the Okefenokee Swamp
Gregor T. Auble, Bernard C. Patten, R. W. Bosserman, David B. Hamilton
1984, Book chapter, The Okefenokee Swamp: Its natural history, geology, and geochemistry
No abstract available....
Modeling the interrelationship of groundwater and surface water
T. C. Winter
J. L. Schnoor, editor(s)
1984, Book chapter, Modeling of total acid precipitation impacts
No abstract available. ...
Satellite remote sensing: Implications for state and local information systems
D. T. Lauer
1984, Conference Paper, Seminar on the multipurpose cadastre: Modernizing land information systems in North America
No abstract available....
Final report. Habitat management evaluation model project. Phase 1: feasibility
K. Andrews, A.H. Farmer, P.J. Sousa
1984, Report
No abstract available....
Pleistocene glaciation of volcano Ajusco, central Mexico, and comparison with the standard Mexican glacial sequence
Sidney White, S. Valastro
1984, Quaternary Research (21) 21-35
Three Pleistocene glaciations and two Holocene Neoglacial advances occurred on volcano Ajusco in central Mexico. Lateral moraines of the oldest glaciation, the Marqués, above 3250 m are made of light-gray indurated till and are extensively modified by erosion. Below 3200 m the till is dark red, decomposed, and buried beneath...
Economics and appraisal of conventional oil and gas resources in the western Gulf of Mexico
Emil Attanasi, John L. Haynes
1984, Journal of Petroleum Technology (36) 2171-2180
The oil and gas industry frequently appraises undiscovered oil and gas resources on a regional basis to decide whether to start or continue exploration programs. The appraisals are of little value unless conditioned by estimates of the costs of finding and producing the resources. This paper presents an economic appraisal...
Forecasting rates of hydrocarbon discoveries in a changing economic environment
J.H. Schuenemeyer, E. D. Attanasi
1984, Marine and Petroleum Geology (1) 313-318
A method is presented for the estimation of undiscovered oil and gas resources in partially explored areas where economic truncation has caused some discoveries to go unreported; therefore distorting the relationship between the observed discovery size distribution and the parent or ultimate field size distribution. The method is applied to...
LINEAR MODELS FOR MANAGING SOURCES OF GROUNDWATER POLLUTION.
Steven M. Gorelick, Sven-Ake Gustafson
Noye JohnFletcher Clive, editor(s)
1984, Conference Paper
Mathematical models for the problem of maintaining a specified groundwater quality while permitting solute waste disposal at various facilities distributed over space are discussed. The pollutants are assumed to be chemically inert and their concentrations in the groundwater are governed by linear equations for advection and diffusion. The aim is...
PREDICTING GROUND-WATER DRAINAGE TO SURFACE MINES.
Linda S. Weiss, Devin L. Galloway
Schreiber David L., editor(s)
1984, Conference Paper
A two-dimensional, finite-difference numerical model is used to simulate the drainage of ground water into a surface coal mine. Graphs of dimensionless head as a function of dimensionless distance, and dimensionless seepage flux as a function of dimensionless time are developed from results of the numerical modeling. Changes in seepage...
Stalking the next Parkfield earthquake in Central California
R. A. Kerr
1984, Earthquake Information Bulletin (USGS) (16) 215-224
Looking southeast from Middle Mountain toward Gold Hill, it is a subtle furrow in the grassy knolls of the Cholame Valley of California's Coast Range. To geophysicists, this 19-mile section of the San Andreas fault midway between San Francisco and Los Angeles is the most well understood, most intensely monitored...
Eyewitness account of the 1931 great earthquake at Hawke’s Bay, New Zealand
H. Spall
1984, Earthquake Information Bulletin (USGS) (16) 12-20
No part of New Zealand is far from a known earthquake origin. The magnitude 7.9 earthquake of 1931 at Hawke's Bay, North Island, on February 3, 1931, was the most serious event recorded in New Zealand hsitory. It was responsible for 256 deaths. The Modified Mercalli intensity reached XI in...
Magnetic properties of the Bay of Islands ophiolite suite and implications for the magnetization of oceanic crust
B. Ann Swift, H. Paul Johnson
1984, Journal of Geophysical Research B: Solid Earth (89) 3291-3308
Rock magnetic properties, opaque mineralogy, and degree of metamorphism were determined for 101 unoriented samples from the North Arm and Blow-Me-Down massifs of the Bay of Islands ophiolite complex, Newfoundland. The weathered and metamorphosed extrusive basalt samples have a weak, secondary magnetization arising from oxidation and exsolution of ilmenite of...
The relationship of Landsat digital data to the properties of Arizona rangelands
Emil H. Horvath, D. F. Post, J. B. Kelsey
1984, Soil Science Society of America Journal (48) 1331-1334
Pedon descriptions, vegetation transect information, and Landsat digital data were obtained for 110 sites on the Tonto National Forest in central Arizona. Using the field and satellite data, 33 variables were evaluated and prediction models were generated using stepwise multiple regression techniques. The following six factors explained 84% of the...
Alternative diagenetic models for cretaceous talus deposits, Deep Sea Drilling Project Site 536, Gulf of Mexico
Robert B. Halley, B. J. Pierson, Wolfgang Schlager
1984, Book chapter, Initial reports of the Deep Sea Drilling Project
Talus deposits recovered from Site 536 show evidence of aragonite dissolution, secondary porosity development, and calcite cementation. Although freshwater diagenesis could account for the petrographic features of the altered talus deposits, it does not uniquely account for isotopic or trace-element characteristics. Also, the hydrologic setting required for freshwater alteration is not easily...
DEFINITION FOR TALC.
Malcolm Ross
Levadie Benjamin, editor(s)
1984, Conference Paper, ASTM Special Technical Publication
Talc is a naturally occurring single-phase mineral having the approximate chemical formula Mg//3Si//4O//1//0(OH)//2 and a specific type of crystal structure. Talc commonly forms by hydrothermal alteration of rocks rich in magnesium and iron (ultramafic rocks) and by low-grade thermal metamorphism of siliceous dolomites. The fact that talc often occurs in...
HYDRAULIC RESEARCH - U. S. GEOLOGICAL SURVEY.
Verne R. Schneider
Schreiber David L., editor(s)
1984, Conference Paper
Research at the Gulf Coast Hydroscience Center near Bay St. Louis, Mississippi, is being conducted in an indoor laboratory, and an outdoor laboratory. Much of the current indoor lab research is directed at improved methods of measuring flow. A towing tank and submerged jet tank are used for calibrating velocity...
Modeling behavior of prescribed fires in Yosemite National Park
J. W. van Wagtendonk, S.J. Botti
1984, Journal of Forestry (82) 479-484
The National Fire Danger Rating System and the Fire Behavior Prediction System were tested on prescribed fires burning underneath canopies in six fuel types in Yosemite National Park, California. The mean error for rate of spread was +0.03 foot per minute for the NFDRS and -0.15 foot for the...
Effects of permanent trap response in capture probability on Jolly-Seber capture-recapture model estimates
James D. Nichols, James E. Hines, Kenneth H. Pollock
1984, Journal of Wildlife Management (48) 289-294
No abstract available. ...
Potential impacts of water diversion on fishery resources in the Great Lakes
Bruce A. Manny
1984, Fisheries (9) 19-23
Uses of Great Lakes water within the Great Lakes basin are steadily increasing, and critical water shortages elsewhere may add to the demands for diversions of water out of the basin in the near future. The impacts of such diversions on fish in the Great Lakes must be considered in...
Deformation of clinopyroxenite: Evidence for a transition in flow mechanisms and semibrittle behavior
S. H. Kirby, A. K. Kronenberg
1984, Journal of Geophysical Research Solid Earth (89) 3177-3192
A systematic suite of constant strain rate experiments was performed on a vacuum-dried, high-purity, fine-grained clinopyroxenite using NaCl and NaF as confining media in a Griggs-type piston-cylinder apparatus. The experiments were carried out over a range of temperatures from 400° to 1100°C, strain rates from 10−3 to 10−7 s−1, and confining pressures...
Response of avian communities to herbicide-induced vegetation changes
Michael L. Morrison, E. Charles Meslow
1984, Journal of Wildlife Management (48) 14-22
The relationships between avian communities and herbicide modification of vegetation were analyzed on early-growth clear-cuts in western Oregon that had received phenoxy herbicide treatment 1 or 4 years previously. For both 1 and 4 years post-spray, vegetation development was greater in the third height interval (> 3.0 m) on untreated...
