Cretaceous biostratigraphy in the Wyoming thrust belt.
D. J. Nichols, S.R. Jacobson
1982, Mountain Geologist (19) 73-78
In the Cretaceous section of the thrust belt, fossils are especially useful for dating and correlating repetitive facies of different ages in structurally complex terrain. The biostratigraphic zonation for the region is based on megafossils (chiefly ammonites) , which permit accurate dating and correlation of outcrop sections, and which have...
An improved method for the determination of trace levels of arsenic and antimony in geological materials by automated hydride generation–Atomic absorption spectroscopy
J.G. Crock, F.E. Lichte
1982, Analytica Chimica Acta (144) 223-233
An improved, automated method for the determination of arsenic and antimony in geological materials is described. After digestion of the material in sulfuric, nitric, hydrofluoric and perchloric acids, a hydrochloric acid solution of the sample is automatically mixed with reducing agents, acidified with additional hydrochloric acid, and treated with a...
Survival, growth, and catchability of rainbow trout of four strains
J.L. Brauhn, H. Kincaid
1982, North American Journal of Fisheries Management (2) 1-10
Fingerling rainbow trout (Salmo gairdneri) of genetically different strains survived, grew, and were caught at different rates by anglers and in gill nets after release from a hatchery into a 1‐hectare pond. When two domestic strains were compared, more fish of the strain genetically selected for fast growth were caught...
Landsat monitoring of desert vegetation growth, 1972-1979 using a plant-shadowing model
Joseph Otterman, C.J. Robinove
1982, Advances in Space Research (2) 45-50
Landsat digital data spanning the period 1972-1979 were analyzed to monitor the status of vegetation within and outside an exclosure in the northern Sinai (precipitation 100-150 mm/year). This 6??6 km exclosure was fenced off in the summer of 1974 and subsequently has been free from the anthropogenic pressures (overgrazing, cultivation...
A model for managing sources of groundwater pollution
Steven M. Gorelick
1982, Water Resources Research (18) 773-781
The waste disposal capacity of a groundwater system can be maximized while maintaining water quality at specified locations by using a groundwater pollutant source management model that is based upon linear programing and numerical simulation. The decision variables of the management model are solute waste disposal rates at various facilities...
Obtaining maps and data from the U.S. Geological Survey
Cheryl A. Hallam
1982, Computers, Environment and Urban Systems (7) 283-294
The U.S. Geological Survey produces a variety of resource information for the United States. This includes many data bases of particular interest to planners such as land use and terrain information prepared by the National Mapping Division, water quantity and quality data collected by Water Resources Division, and coal resource...
Stability studies of surficial sediments in the Wilmington-Lindenkohl Canyons area, eastern U.S. margin
G. Almagor, R.H. Bennett, B.A. Mc Gregor, L.E. Shephard
1982, Geo-Marine Letters (2) 129-134
Stability analysis, based on infinite slope analysis and geotechnical data from a suite of 34 cores collected from the continental slope between Wilmington and Lindenkohl Canyons, indicates that the Quaternary surficial silty clay sediments on gentle slopes are stable; that sediment stability on steeper slopes (14??-19??) is marginal; and that...
An analysis of input errors in precipitation-runoff models using regression with errors in the independent variables
Brent M. Troutman
1982, Water Resources Research (18) 947-964
Errors in runoff prediction caused by input data errors are analyzed by treating precipitation-runoff models as regression (conditional expectation) models. Independent variables of the regression consist of precipitation and other input measurements; the dependent variable is runoff. In models using erroneous input data, prediction errors are inflated and estimates of...
Stratigraphy, structure, absolute age, and paleontology of the upper Pleistocene deposits at Sankaty Head, Nantucket Island, Massachusetts
Robert N. Oldale, Page C. Valentine, T. M. Cronin, E.C. Spiker, B. W. Blackwelder, D. F. Belknap, J.F. Wehmiller, Barney J. Szabo
1982, Geology (10) 246-252
The Sankaty Head cliff exposes drift of at least two glaciations and interglacial marine deposits. Radiocarbon, amino-acid- racemization, and uranium-thorium analyses were used to determine the absolute ages of the beds. The results indicate that 1) the Sankaty Sand correlates with oxygen-isotope stage 5 (Sangamonian), 2) the underlying drift is...
Low-temperature formation of hydrocarbon gases in San Francisco Bay sediment (California, U.S.A.)
T.M. Vogel, R.S. Oremland, K.A. Kvenvolden
1982, Chemical Geology (37) 289-298
To understand the processes responsible for the presence of low-molecular-weight hydrocarbons (C1-C4) in anoxic environments, we studied sediments collected from an anaerobic estuarine mudflat. In these sediments methane (C1) was several orders of magnitude more abundant than all other C2-C4 hydrocarbons; the C1 (C2 + C3) ratio was ??? 13,000....
Estimation of earthquake source parameters by the inversion of waveform data: synthetic waveforms
S.A. Sipkin
1982, Physics of the Earth and Planetary Interiors (30) 242-259
Two methods are presented for the recovery of a time-dependent moment-tensor source from waveform data. One procedure utilizes multichannel signal-enhancement theory; in the other a multichannel vector-deconvolution approach, developed by Oldenburg (1982) and based on Backus-Gilbert inverse theory, is used. These methods have the advantage of being extremely flexible; both...
Fission-track evidence for Quaternary uplift of the Nanga Parbat region, Pakistan
P.K. Zeitler, N.M. Johnson, C. W. Naeser, R.A.K. Tahirkheli
1982, Nature (298) 255-257
The north-striking Nanga Parbat-Haramosh Massif protrudes into the northwestern Himalaya along the axis of a great syntaxis1,2 (Fig. 1), where the Hindu Kush, Karakorum, and Himalayan ranges converge. As the Indus Suture Zone3 enters this region from the east it bifurcates into two branches, encircling what may be a docked...
Map reading tools for map libraries.
G.L. Greenberg
1982, Information Bulletin, Western Association of Map Libraries (13) 290-300
Engineers, navigators and military strategists employ a broad array of mechanical devices to facilitate map use. A larger number of map users such as educators, students, tourists, journalists, historians, politicians, economists and librarians are unaware of the available variety of tools which can be used with maps to increase the...
Carbonate porosity versus depth: A predictable relation for south Florida
J. W. Schmoker, R. B. Halley
1982, American Association of Petroleum Geologists Bulletin (66) 2561-2570
This study examines the porosity of limestones and dolomites in the South Florida basin. Porosity data are derived from borehole-gravity measurements and from suites of acoustic, neutron, and density logs. Both types of wire-line measurements sample large volumes of rock relative to petrographic methods and can be examined at vertical...
Incorporation of prior information on parameters into nonlinear regression groundwater flow models: 1. Theory
Richard L. Cooley
1982, Water Resources Research (18) 965-976
Prior information on the parameters of a groundwater flow model can be used to improve parameter estimates obtained from nonlinear regression solution of a modeling problem. Two scales of prior information can be available: (1) prior information having known reliability (that is, bias and random error structure) and (2) prior...
Organic geochemistry of core samples from an ultradeep hot well (300°C, 7 km)
Leigh C. Price
1982, Chemical Geology (37) 215-228
South Texas cores of Lower Cretaceous rocks from a depth of 6400.8 to 7544.6 m at present-day temperatures of 262–296°C have high concentrations of C15+ hydrocarbons. Bitumen coefficients range from 105 to 367 mg/g and C15+ extractable bitumen ranges from 500 to 2200 ppm. Some generation potential remains associated with the...
The graphic cell method: a new look at digitizing geologic maps
J.T. Hanley
1982, Computers & Geosciences (8) 149-161
The graphic cell method is an alternative method of digitizing areal geologic information. It involves a discrete-point sampling scheme in which the computer establishes a matrix of cells over the map. Each cell and the whole cell is assigned the identity or value of the geologic information that is recognized...
Biostratigraphy and paleoenvironment of Miocene- Pliocene hemipelagic limestone: Kingshill Seaway, St. Croix, US Virgin Islands.
B. H. Lidz
1982, Journal of Foraminiferal Research (12) 205-233
The Kingshill Limestone and younger carbonate rocks constitute the central portion of St. Croix, forming the remains of an ancient seaway that was flanked by emergent highlands. The seaway has been filled with thick epipelagic sediments alternating with carbonate turbidites and ash falls and capped with shallow-water reefal and terrigenous...
Late Eocene- Oligocene magnetostratigraphy and biostratigraphy at South Atlantic DSDP site 522
R.Z. Poore, L. Tauxe, S.F. Percival Jr., John L. LaBrecque
1982, Geology (10) 508-511
Upper Eocene to lowest Miocene sediments recovered at Deep Sea Drilling Project (DSDP) Site 522 in the South Atlantic Ocean allow direct calibration of magnetostratigraphy and calcareous plankton biostratigraphy. The results from Site 522 show that the Eocene/Oligocene boundary occurs in the reversed...
Plasma corticosteroids and chlorides in striped bass exposed to tricaine methanesulfonate, quinaldine, etomidate, and salt
K. B. Davis, N. C. Parker, M. A. Suttle
1982, Progressive Fish-Culturist (44) 205-207
Plasma chloride and corticosteroid concentrations were measured in yearling striped bass (Morone saxatilis) exposed to 25 mg/L tricaine methanesulfonate, 2.5 mg/L quinaldine, or 0.1 mg/L etomidate (an experimental drug), alone and in combination with 10 g/L salt (NaCl). Plasma chloride levels were unaffected in all treatments during a 15‐min exposure...
An equation correlating the solubility of quartz in water from 25° to 900°C at pressures up to 10,000 bars
Robert O. Fournier, Robert W. Potter II
1982, Geochimica et Cosmochimica Acta (46) 1969-1973
The solubility of quartz in water from 25° to 900°C at specific volume of the solvent ranging from about 1 to 10 and from 300° to 600°C at specific volume of the solvent ranging from about 10 to 100 is given by an empirically derived equation of the form: log m = A + B(log V)...
Survival of duck plaque virus in water from Lake Andes National Wildlife Refuge, South Dakota
K. Wolf, C.N. Burke
1982, Journal of Wildlife Diseases (18) 437-440
An isolant of duck plague herpesvirus from the Lake Andes Refuge outbreak was seeded in raw and filter-decontaminated water from two locations on the refuge, held at 4 C, and assayed for infectivity intermittently over a period of 2 mo. From an initial...
Exotic terranes of western California
M.O. McWilliams, D. G. Howell
1982, Nature (297) 215-217
Numerous distinct geological terranes compose the North American Cordillera1; there may be as many as 50 terranes in California alone2. Critical to deciphering the history of Cordilleran tectonic assembly is an understanding of the displacement history of individual terranes. It is therefore important to know: (1) whether a terrane has...
Genetic relations among basic lavas and ultramafic nodules: Evidence from oxygen isotope compositions
T.K. Kyser, J. R. O’Neil, I. S. E. Carmichael
1982, Contributions to Mineralogy and Petrology (81) 88-102
??18O values of unaltered basic lavas range from 4.9 to 8.3 but different types of basalts are usually restricted to narrow and distinct ranges of isotopic composition. The average ??18O values for Hawaiian tholeiites, mid-ocean ridge tholeiites, and alkali basalts are 5.4, 5.7, and 6.2 permil, respectively. Potassic lavas and...
U.S. Geological Survey Federal-State Program
T.J. Buchanan, B.K. Gilbert
1982, Journal of Water Resources Planning and Management (108) 37-45
The U.S. Geological Survey Federal-State Cooperative Water Resource Program is a partnership between the Geological Survey and State and local agencies for the collection of the hydrologic information needed for the continuing determination and evaluation of the quantity, quality, and use of the Nation's water resources. The first Cooperative Program...
