Potential effects of surface coal mining on the hydrology of the West Otter area, Ashland and Birney-Broadus coal fields, southeastern Montana
N. E. McClymonds
1984, Water-Resources Investigations Report 84-4087
Shallow aquifers exist primarily within the Tongue River Member of the Paleocene Fort Union Formation and within valley alluvium. Sandstone beds are the principal aquifers for domestic supply and livestock watering, with the Knobloch coal bed being a secondary source of supply. Surface-water resources consist principally of perennial flow in...
Magmatic epidote and its petrologic significance
E-An Zen, J. M. Hammarstrom
1984, Geology (12) 515-518
Epidote is a major magmatic mineral in tonalite and granodiorite in a belt coextensive with the Mesozoic accreted terranes between northern California and southeastern Alaska. Textural and chemical evidence indicates that epidote crystallized as a relatively late but magmatic mineral that formed through...
Waste water management techniques at the United States national fish hatcheries
Adam G. Fox
1984, Conference Paper
No abstract available ...
Phenotypic variation of the Mexican duck (Anas platyrhynchos diazi) in Mexico
N.J. Scott Jr., R.P. Reynolds
1984, Condor (86) 266-274
A collection of 98 breeding Mexican Ducks (Anas platyrhynchos diazi) was made in Mexico from six areas between the United States border with Chihuahua and Lake Chapala, Jalisco, in order to study geographic variation. Plumage indices showed a relatively smooth clinal change from north to south; northern populations were...
Feeding activity, rate of consumption, daily ration, and prey selection of major predators in the John Day Pool
G.A. Gray, D.E. Palmer, B.L. Hilton, P.J. Connolly, H.C. Hansel, J.M. Beyer, P.T. Lofty, G.M. Sonnevil
1984, Report
No abstract available ...
ROLE OF SPATIAL RESOLUTION AND SPECTRAL CONTENT IN CHANGE DETECTION.
Valerie A. Milazzo
1984, Conference Paper
Summary form only given, as follows. Advancements in remote sensing technology have brought improvements and sophistication to modern remote sensor systems, especially those aboard earth resources satellites. These improvements have considerbly expanded the capabilities of the newer sensor systems, particularly the capability to achieve greatly increased spatial and spectral resolution...
Use of Columbia River reservoirs for rearing by juvenile fall Chinook salmon and some management implications
G.A. Gray, D.W. Rondorf
1984, Conference Paper, Proceedings of the third annual conference of North American lake management society
No abstract available ...
The changing hydrology at Mount St. Helens
S. Brantley
1984, Earthquake Information Bulletin (USGS) (16) 106-122
Eruptive activity of Mount St. Helens; March 1980 March 1984
S. Brantley
1984, Earthquake Information Bulletin (USGS) (16) 52-67
Oil company captures Wyoming earthquake
R.D. Clark
1984, Earthquake Information Bulletin (USGS) (16) 225-226
Hawaii earthquake of November 16, 1983
R.W. Decker, Robert Y Koyanagi
1984, Earthquake Information Bulletin (USGS) (16) 4-9
Volcanic studies at the David A. Johnston Cascades Volcano Observatory
S. Brantley
1984, Earthquake Information Bulletin (USGS) (16) 44-51
Team effort meets 1983 landslide emergency in Utah
E. E. Brabb, R. W. Fleming
1984, Earthquake Information Bulletin (USGS) (16) 128-135
Map of the Carpinteria area and vicinity, Santa Barbara County, California, showing water-level contours for March 1982
Dorothy Maltby
1984, Water-Resources Investigations Report 83-4273
A water-level contour map of the Carpinteria area, California, has been completed by the U.S. Geological Survey using 34 water-level measurements made by the Carpinteria County Water District in March 1982. Also shown are 5 hydrographs that show water-level fluctuations in each well between 1977 and 1982....
Monitoring activities at Mount St. Helens and other Cascade volcanoes
S. Brantley
1984, Earthquake Information Bulletin (USGS) (16) 68-105
Botanical and geological significance of potassium-argon dates from the Juan Fernández Islands
Tod F. Stuessy, K.A. Foland, John F. Sutter, Roger W. Sanders, O. Mario Silva
1984, Science (225) 49-51
Potassium-argon dating of five basalts from the three main islands of the Juan Fernández (or Robinson Crusoe) Islands of Chile in the southeastern Pacific gives ages of 1.01 ± 0.12 and 2.44 ± 0.14 million years for Masafuera, 3.79 ± 0.20 and 4.23 ± 0.16 for Masatierra, and 5.8 ±...
Heat capacity and thermodynamic functions for gehlenite and staurolite: with comments on the Schootky anomaly in the heat capacity of staurolite.
B. S. Hemingway, R. A. Robie
1984, American Mineralogist (69) 307-318
The heat capacities of a synthetic gehlenite and a natural staurolite were measured from 12 and 5 K, respectively, to 370 K by adiabatic calorimetry, and the heat capacities of staurolite were measured to 900 K by differential scanning calorimetry. At 298.15 K and 1 bar the entropy of gehlenite...
The group separation of the rare-earth elements and yttrium from geologic materials by cation-exchange chromatography
J.G. Crock, F.E. Lichte, T.R. Wildeman
1984, Chemical Geology (45) 149-163
Demand is increasing for the determination of the rare-earth elements (REE) and yttrium in geologic materials. Due to their low natural abundance in many materials and the interferences that occur in many methods of determination, a separation procedure utilizing gradient strong-acid cation-exchange chromatography is often used to preconcentrate and isolate...
Propagation and linkage of oceanic ridge segments
David D. Pollard, Atilla Aydin
1984, Journal of Geophysical Research Solid Earth (89) 10017-10028
We have investigated the propagation of spreading ridges and the development of structures that link ridge segments using an analogy between ridges and cracks in elastic plates. The ridge-propagation force and a path factor that controls propagation direction were calculated for echelon ridge segments propagating toward each other. The ridge-propagation...
Carbon isotope fractionation of sapropelic organic matter during early diagenesis
Elliott C. Spiker, Patrick G. Hatcher
1984, Organic Geochemistry (5) 283-290
Study of an algal, sapropelic sediment from Mangrove Lake, Bermuda shows that the mass balance of carbon and stable carbon isotopes in the major organic constituents is accounted for by a relatively straightforward model of selective preservation during diagenesis. The loss of 13C-enriched carbohydrates is the principal factor controlling the intermolecular...
Pedimentation versus debris-flow origin of plateau-side desert terraces in southern Utah
V. S. Williams
1984, Journal of Geology (92) 457-468
Plateau-side terraces in arid areas around the world are commonly described as pediment remnants, although, in many cases, they may have been formed by debris-flow deposition. Pediments do exist in the area of the Aquarius and Kaiparowits Plateaus of southern Utah; however, many alluvial terraces that were classified by previous...
Analytical results and sample locality map of stream-sediment, heavy-mineral-concentrate, rock, and water samples from the Chemehuevi Mountains Wilderness Study Area (CDCA-310), San Bernardino County, California
R.T. Hopkins, J. P. Fox, J.C. Antweiler, W. L. Campbell
1984, Open-File Report 84-261
No abstract available....
Midseason mapping of sunflowers using Landsat digital data
W.H. Anderson, D.O. Ohlen, S.D. Fairaizl
1984, Journal of Wildlife Management (48) 295-298
The mapping results suggest that for the midsummer Landsat data used, there was not a sufficiently reliable relationship between Landsat-derived spectral clusters and sunflowers to allow 'automated' production of useful sunflower location maps. The occurrence of sunflower pixels in all cluster classes was a consequence of the diversity in sunflower...
Optimization of electrothermal atomization parameters for simultaneous multielement atomic absorption spectrometry
J. M. Harnly, Jean S. Kane
1984, Analytical Chemistry (56) 48-54
The effect of the acid matrix, the measurement mode (height or area), the atomizer surface (unpyrolyzed and pyrolyzed graphite), the atomization mode (from the wall or from a platform), and the atomization temperature on the simultaneous electrothermal atomization of Co, Cr, Cu, Fe, Mn, Mo, Ni, V, and Zn was...
Land use of the Redwood Creek basin
D. Best
1984, Redwood National Park 9
No abstract available at this time...
