Error in measuring radon in soil gas by means of passive detectors
A.B. Tanner
1991, Nuclear Geophysics (5) 25-30
Passive detection of radon isotopes depends on diffusion of radon atoms from the sites of their generation to the location of the detecting or collecting device. Because some radon decays en route to a passive detector in soil, the radon concentration measured by the detector must be less than the...
Quantitative controls on submarine slope failure morphology
H.J. Lee, W. C. Schwab, B. D. Edwards, R. E. Kayen
1991, Marine Geotechnology (10) 143-157
The concept of the steady-state of deformation can be applied to predicting the ultimate form a landslide will take. The steady-state condition, defined by a line in void ratio-effective stress space, exists at large levels of strain and remolding. Conceptually, if sediment initially exists with void ratio-effective stress conditions above...
Uncertainty in climate change and drought
Gregory J. McCabe, David M. Wolock, Gary D. Tasker, Mark A. Ayers
Shane Richard M., editor(s)
1991, Conference Paper, Proceedings - National Conference on Hydraulic Engineering
A series of projections of climate change were applied to a watershed model of the Delaware River basin to identify sources of uncertainty in predicting effects of climate change on drought in the basin as defined by New York City reservoir contents. The watershed model is a calibrated, monthly time-step...
Wind generated wave resuspension of sediment in Old Tampa Bay, Florida
David H. Schoellhamer, Victor A. Levesque
Shane Richard M., editor(s)
1991, Conference Paper, Proceedings - National Conference on Hydraulic Engineering
Vertical profiles of velocity and suspended-solids concentration were measured at a scientific instrumentation platform in Old Tampa Bay during the passage of a cold front in March 1990. Strong sustained winds behind the front increased wave activity in the bay, which resulted in resuspension of bottom sediments. The concentration of...
A new approach to plane-sweep overlay: topological structuring and line-segment classification
Jan W. van Roessel
1991, Cartography and Geographic Information Systems (18) 49-67
An integrated approach to spatial overlay was developed with the objective of creating a single function that can perform most of the tasks now assigned to discrete functions in current systems. Two important components of this system are a unique method for topological structuring, and a method for attribute propagation...
Brood stock segregation of spring chinook salmon Oncorhynchus tshawytscha by use of the enzyme-linked immunosorbent assay (ELISA) and the fluorescent antibody technique (FAT) affects the prevalence and levels of Renibacterium salmoninarum infection in progeny
Ronald J. Pascho, Diane G. Elliott, Jonathan M. Streufert
1991, Diseases of Aquatic Organisms (12) 25-40
A study of the effect of maternal Renibacterium salmoninarum infection levels on the prevalence and levels of bacterial kidney disease (BKD) in progeny fish was conducted at a production salmon hatchery. A total of 302 mating pairs of spring chinook salmon Oncorhynchus tshawytscha was screened in August 1988 for R....
Major results of gravity and magnetic studies at Yucca Mountain, Nevada
H. W. Oliver, D. A. Ponce, R. F. Sikora
Anon, editor(s)
1991, Conference Paper, High Level Radioactive Waste Management
About 4,000 gravity stations have been obtained at Yucca Mountain and vicinity since the beginning of radioactive-waste studies there in 1978. These data have been integrated with data from about 29,000 stations previously obtained in the surrounding region to produce a series of Bouguer and isostatic-residual-gravity maps of the Nevada...
Petrology of lower crustal and upper mantle xenoliths from the Cima Volcanic Field, California
H. G. Wilshire, A. V. McGuire, J.S. Noller, B. D. Turrin
1991, Journal of Petrology (32) 169-200
Basaltic rocks of the Cima volcanic field in the southern Basin and Range province contain abundant gabbro, pyroxenite, and peridotite xenoliths. Composite xenoliths containing two or more rock types show that upper-mantle spinel peridotite was enriched by multiple dike intrusions in at least three episodes; the mantle was further...
Metabolism and elimination of benzocaine by rainbow-trout, Oncorhynchus mykiss
J.R. Meinertz, W.H. Gingerich, J. L. Allen
1991, Xenobiotica (21) 525-533
1. Branchial and urinary elimination of benzocaine residues was evaluated in adult rainbow trout, oncorhynchus mykiss, given a single dorsal aortic dose of c-14-benzocaine hydrochloride.^2. Branchial elimination of benzocaine residues was rapid and accounted for 59.2% Of the dose during the first 3 h after dosing. Renal...
Jasper Seamount: Seven million years of volcanism
M. S. Pringle, H. Staudigel, J. Gee
1991, Geology (19) 364-368
Jasper Seamount is a young, mid-sized (690 km3) oceanic intraplate volcano located about 500 km west-southwest of San Diego, California. Reliable 40Ar/39Ar age data were obtained for several milligram-sized samples of 4 to 10 Ma plagioclase by using a defocused laser beam to clean...
Late Quaternary faulting along the Death Valley-Furnace Creek fault system, California and Nevada
George E. Brogan, Karl S. Kellogg, D. Burton Slemmons, Christina L. Terhune
1991, Bulletin 1991
The Death Valley-Furnace Creek fault system, in California and Nevada, has a variety of impressive late Quaternary neotectonic features that record a long history of recurrent earthquake-induced faulting. Although no neotectonic features of unequivocal historical age are known, paleoseismic features from multiple late Quaternary events of surface faulting are well...
Water geothermometers applied to geothermal energy
R.O. Fournier
1991, Book chapter, Applications of geochemistry in geothermal reservoir development
No abstract available ...
Use of electronic microprocessor-based instrumentation by the U.S. geological survey for hydrologic data collection
William G. Shope Jr.
Shane Richard M., editor(s)
1991, Conference Paper, Proceedings - National Conference on Hydraulic Engineering
The U.S. Geological Survey is acquiring a new generation of field computers and communications software to support hydrologic data-collection at field locations. The new computer hardware and software mark the beginning of the Survey's transition from the use of electromechanical devices and paper tapes to electronic microprocessor-based instrumentation. Software is...
The effects of noise due to random undetected tilts and paleosecular variation on regional paleomagnetic directions
G.J. Calderone, R.F. Butler
1991, Journal of Geophysical Research (96) 3973-3977
Random tilting of a single paleomagnetic vector produces a distribution of vectors which is not rotationally symmetric about the original vector and therefore not Fisherian. Monte Carlo simulations were performed on two types of vector distributions: (1) distributions of vectors formed by perturbing a single...
Effect of channelization of Rio Puerto Nuevo on ground-water levels in the San Juan metropolitan area, Puerto Rico
Ingrid Padilla
1991, Conference Paper
Channelization and concrete lining of the Rio Puerto Nuevo and its tributaries in the San Juan Metropolitan area has been proposed to control flooding in low lying areas adjacent to the stream. Concern about the effect of these channel modifications on the ground-water system prompted the U.S. Geological Survey in...
Trondhjemitic, 1.35-1.31 Ga gneisses of the Mount Holly Complex of Vermont: evidence for an Elzevirian event in the Grenville Basement of the United States Appalachians
N. M. Ratcliffe, J. N. Aleinikoff, W.C. Burton, P. Karabinos
1991, Canadian Journal of Earth Sciences (28) 77-93
A newly recognized suite of trondhjemite–tonalite and dacitic gneiss forms a 10 km wide belt of rocks within the Mount Holly Complex in the central part of the Green Mountain massif of Vermont. Field relationships and chemistry indicate that these gneisses are calc-alkaline, volcanic, and hypabyssal plutonic rocks older than the...
Comparative geometry of the San Andreas Fault, California, and laboratory fault zones
Diane E. Moore, J.D. Byerlee
1991, Geological Society of America Bulletin (103) 762-774
Textural examination of fault gouge deformed in triaxial friction experiments has revealed differences in the orientations of secondary shear sets between the stably sliding and stick-slip samples. In order to determine whether such differences can be identified in natural faults, maps of recently...
Development of a land-cover characteristics database for the conterminous U.S.
Thomas R. Loveland, J.W. Merchant, D.O. Ohlen, Jesslyn F. Brown
1991, Photogrammetric Engineering and Remote Sensing (57) 1453-1463
Information regarding the characteristics and spatial distribution of the Earth's land cover is critical to global environmental research. A prototype land-cover database for the conterminous United States designed for use in a variety of global modelling, monitoring, mapping, and analytical endeavors has been created. The resultant database contains multiple layers,...
More wells will expand knowledge of Knox group, Black Warrior basin
Dorothy E. Raymond
1991, Oil & Gas Journal (89) 58-62
The Cambrian-Ordovician Knox group of the Black Warrior basin in Alabama and Mississippi has attracted the interest of the oil industry because of recent significant discoveries of oil and gas in the age-equivalent Arbuckle group carbonates of the Arkoma, Ardmore, and Anadarko basins of Oklahoma. The geologic setting of these...
Low-K granophyres of the Stillwater Complex, Montana
G.K. Czamanske, M. L. Zientek, C. E. Manning
1991, American Mineralogist (76) 1646-1661
Small bodies of granophyre occur as a volumetrically insignificant but ubiquitous component of the Banded series of the Stillwater Complex. White to pink granophyre typically occurs as veins, 1-12cm thick and as much as 100m long. A geochemically similar body of coalescing alaskite dikes, associated with an occurrence of Pt-group...
Fluid inclusion gas chemistry as a potential minerals exploration tool: Case studies from Creede, CO, Jerritt Canyon, NV, Coeur d'Alene district, ID and MT, southern Alaska mesothermal veins, and mid-continent MVT's
G. P. Landis, A. H. Hofstra
1991, Journal of Geochemical Exploration (42) 25-59
Recent advances in instrumentation now permit quantitative analysis of gas species from individual fluid inclusions. Fluid inclusion gas data can be applied to minerals exploration empirically to establish chemical (gas composition) signatures of the ore fluids, and conceptually through the development...
Metasomatic oxidation of upper mantle periodotite
A. V. McGuire, M.D. Dyar, J. E. Nielson
1991, Contributions to Mineralogy and Petrology (109) 252-264
Examination of Fe3+ in metasomatized spinel peridotite xenoliths reveals new information about metasomatic redox processes. Composite xenoliths from Dish Hill, California possess remnants of magmatic dikes which were the sources of the silicate fluids responsible for metasomatism of the peridotite part of the same xenoliths. Mo??ssbauer spectra of mineral separates...
Towable cage for studies of smoltification in Atlantic salmon
D. V. Rottiers
1991, Progressive Fish-Culturist (53) 124-127
The floating towable cage described in this report was used successfully to hold and transport Atlantic salmon (Salmo salar) in estuarine waters. These rugged and versatile cages, constructed from readily available, inexpensive materials, were tied singly and in clusters to floating docks in fresh and brackish water, where they withstood...
Marinas, mines, and mudpots. Building a feature-based production system at the U.S. geological survey
Gary B. Chappell, Kathryn C. Neff
1991, Conference Paper, GIS/LIS 1991 ACSM-ASPRS Fall Convention
By the mid-1990's, the U.S. Geological Survey expects to produce spatial data according to its new data model, Digital Line Graph-Enhanced (DLG-E). This new data model currently defines more than 200 unique feature types that describe the geographic phenomena portrayed on the series of 1:24,000-scale topographic maps. Characteristics of features...
Developmental differences in the responsiveness of gill Na+, K+ and -ATPase to cortisol salmonids
S. D. McCormick, Walton W. Dickhoff, J. Duston, R. S. Nishioka, H. A. Bern
1991, General and Comparative Endocrinology (84) 308-317
The ability of cortisol to increase gill Na+, K+-ATPase activity was examined in several salmonid species during development. Coho salmon (Oncorhynchus kisutch) parr were unresponsive to cortisol in vitro (10 μg/ml for 2 days) in November. Responsiveness was significant from January to March, peaking in January just prior to seasonal increases in...
