Reproduction in a Western Smooth Earth Snake (Virginia valeriae elegans) from Western Kentucky
M.A. Morris, S. J. Walsh
1991, Bulletin of the Chicago Herpetological Society (26) 133
Abstract not supplied at this time...
Two incubating mallards move eggs to drier nest sites
J. P. Fleskes
1991, Prairie Naturalist (23) 49-50
Abstract has not been submitted...
Crustal resistivity structure from magnetotelluric soundings in the Colorado Plateau-Basin and Range provinces, central and western Arizona
D. P. Klein
1991, Journal of Geophysical Research (96) 12313-12331
Resistivity structure to about 25 km depth is defined from two-dimensional modeling of 29 magnetotelluric (MT) soundings (0.002–5 Hz) that traverse 280 km of the southwestern Colorado Plateau, transition zone, and Basin and Range provinces in Arizona. From the surface to 5 km depth, the MT...
Fish and fishes of Saint Helena Island, by Alasdair J. Edwards
W. F. Smith-Vaniz
1991, Copeia (1991) 1155-1156
No abstract available....
New starter diets for Atlantic salmon
G. L. Rumsey, S. G. Hughes
1991, Research Information Bulletin 73
No abstract available at this time...
Prospecting for gold in the United States
Harold Kirkemo
1991, Report
Fault orientations in extensional and conjugate strike-slip environments and their implications
W. Thatcher, D.P. Hill
1991, Geology (19) 1116-1120
Seismically active conjugate strike-slip faults in California and Japan typically have mutually orthogonal right- and left-lateral fault planes. Normal- fault dips at earthquake nucleation depths are concentrated between 40° and 50°. The observed orientations and their strong clustering are surprising, because conventional faulting...
Commentary on the sphalerite geobarometer
P. Toulmin III, P. B. Barton Jr., L.B. Wiggins
1991, American Mineralogist (76) 1038-1051
The FeS content of sphalerite in assemblages with pyrite and pyrrhotite has been widely used and widely criticized as a geobarometer. The commonly accepted form of the geobarometer is based on the composition of sphalerite being independent of temperature below about 550??C at all pressures up to at least 10...
Late Cretaceous and early Tertiary plutonism and deformation in the Skagit Gneiss Complex, north Cascade Range, Washington and British Columbia
R. A. Haugerud, P. Van Der Heyden, R. W. Tabor, J. S. Stacey, R. E. Zartman
1991, Geological Society of America Bulletin (103) 1297-1307
The Skagit Gneiss Complex forms a more-or-less continuous terrane within the northern, more deeply eroded part of the North Cascade Range. The complex comprises abundant plutons intruded at mid-crustal depths into a variety of metamorphosed supracrustal rocks of both oceanic and volcanic-arc origin. A plethora of syntectonic pegmatite, small plutons,...
Satellite and earth science data management activities at the U.S. geological survey's EROS data center
David M. Carneggie, Gary G. Metz, William C. Draeger, Ralph J. Thompson
1991, Conference Paper, GIS/LIS 1991 ACSM-ASPRS Fall Convention
The U.S. Geological Survey's Earth Resources Observation Systems (EROS) Data Center, the national archive for Landsat data, has 20 years of experience in acquiring, archiving, processing, and distributing Landsat and earth science data. The Center is expanding its satellite and earth science data management activities to support the U.S. Global...
Estimation of suspended-sediment rating curves and mean suspended-sediment loads
Charles G. Crawford
1991, Journal of Hydrology (129) 331-348
Suspended-sediment loads are often estimated from an empirical relation between suspended-sediment load (L) and streamflow (S). This relation is usually defined as a power function, L = aSh, and is referred to as a suspended-sediment rating curve. This function can be formulated as either a linear or non-linear model to...
Isotopic evidence for early Proterozoic age of the Idono Complex, west-central Alaska
Marti L. Miller, J.Y. Bradshaw, D.L. Kimbrough, T. W. Stern, T. K. Bundtzen
1991, Journal of Geology (99) 209-223
The Idono Complex of west-central Alaska is a fault-bounded, fragment of Early Proterozoic continental crust surrounded by overlap assemblages and younger terranes accreted in Mesozoic time. It is composed of granitic to dioritic orthogneiss, amphibolite, and metasedimentary rocks. Trace...
[Book review] Little islands floating in seas of indifference?
C. Schonewald-Cox
1991, Park Science (11) 19-19
Review of: NATURE RESERVES; ISLAND THEORY AND CONSERVATION PRACTICE 1990. by Craig L. Shafer. Smithsonian Institution Press. Washington and London, 189 pp. ISBN 0-87474-805-4....
Evolution of deep structure along the trans-Alaska crustal transect, Chugach Mountains and Copper River Basin, southern Alaska
G. S. Fuis, George Plafker
1991, Journal of Geophysical Research (96) 4229-4253
One of the most important results of the Trans-Alaska Crustal Transect investigations is the discovery that more than one third of the North American plate in southern Alaska (Chugach Mountains and Copper River basin) consists of tectonically underplated oceanic lithosphere. In southern Alaska, exposed accreted...
Sources of dissolved and particulate organic material in Loch Vale Watershed, Rocky Mountain National Park, Colorado, USA
Jill Baron, Diane M. McKnight, A. Scott Denning
1991, Biogeochemistry (15) 89-110
The sources of both dissolved organic carbon (DOC) and particulate organic carbon (POC) to an alpine (Sky Pond) and a subalpine lake (The Loch) in Rocky Mountain National Park were explored for four years. The importance of both autochthonous and allochthonous sources of organic matter differ, not only between alpine...
New concepts in protein supplementation starter salmon diets
S. G. Hughes, G. L. Rumsey
1991, Feed Management (42) 58-62
Sensitivity analysis of a ground-water-flow model
Lynn J. Torak
Lennon Gerard P.Rouhani Shahrokh, editor(s)
1991, Conference Paper, Symposium on Ground Water
A sensitivity analysis was performed on 18 hydrological factors affecting steady-state groundwater flow in the Upper Floridan aquifer near Albany, southwestern Georgia. Computations were based on a calibrated, two-dimensional, finite-element digital model of the stream-aquifer system and the corresponding data inputs. Flow-system sensitivity was analyzed by computing water-level residuals obtained...
Lead poisoning of a marbled godwit
L. N. Locke, M. R. Smith, R. M. Windingstad, S. J. Martin
1991, The Prairie Naturalist (23) 21-24
A thin adult female marbled godwit (Limosa fedoa) found dead at Benton Lake National Wildlife Refuge, Montana, was found to have 17 ingested lead shot in its gizzard. Its liver contained 51.7 ppm lead (wet weight). Based on these necropsy findings a diagnosis of lead poisoning was made....
Major element, REE, and Pb, Nd and Sr isotopic geochemistry of Cenozoic volcanic rocks of eastern China: Implications for their origin from suboceanic-type mantle reservoirs
A. R. Basu, Junwen Wang, Wankang Huang, Guanghong Xie, M. Tatsumoto
1991, Earth and Planetary Science Letters (105) 149-169
Major- and rare-earth-element (REE) concentrations and UThPb, SmNd, and RbSr isotope systematics are reported for Cenozoic volcanic rocks from northeastern and eastern China. These volcanic rocks, characteristically lacking the calc-alkaline suite of orogenic belts,...
Terraces on the Florida escarpment: Implications for erosional processes
D.C. Twichell, C. K. Paull, L.M. Parson
1991, Geology (19) 897-900
SeaBeam bathymetric data and GLORIA (Geologic LOng-Range Inclined Asdic) sidescan sonar images of a 175-km-long section of the Florida escarpment in the eastern Guff of Mexico show that this carbonate escarpment has been eroded since its initial formation, but its morphology suggests that erosional processes have not acted uniformly on...
Exploration drilling and reservoir model of the Platanares geothermal system, Honduras, Central America
F. Goff, S.J. Goff, S. Kelkar, L. Shevenell, A.H. Truesdell, J. Musgrave, H. Rufenacht, W. Flores
1991, Journal of Volcanology and Geothermal Research (45) 101-123
Results of drilling, logging, and testing of three exploration core holes, combined with results of geologic and hydrogeochemical investigations, have been used to present a reservoir model of the Platanares geothermal system, Honduras. Geothermal fluids circulate at depths ??? 1.5 km in a region of active tectonism devoid of Quaternary...
Source of atrazine and desethylatrazine in a river, during base flow
Paul J. Squillace, E. Michael Thurman, Edward E. Fischer, Phil J. Soenksen
1991, Conference Paper
A budget of atrazine and desethylatrazine loads was computed for a 116-kilometer reach of the Cedar River in Iowa to determine where these compounds enter the river during base-flow conditions. Loads were determined by measuring discharge and concentrations of the compounds for four main-stem sites along the Cedar River and...
Assessment of fracture-sampling techniques for laboratory tests on core
G.R. Severson, J.M. Boernge
Anon, editor(s)
1991, Conference Paper, High Level Radioactive Waste Management
As part of the site characterization work to be done at Yucca Mountain in Nye County, Nevada, a candidate site for the first mined-geologic repository for high-level nuclear waste, laboratory tests are proposed to evaluate fluid flow in single fractures. Laboratory and onsite tests were conducted to develop methods for...
Comparison of three different methods to merge multiresolution and multispectral data: Landsat TM and SPOT panchromatic
P.S. Chavez Jr., S.C. Sides, J.A. Anderson
1991, Photogrammetric Engineering and Remote Sensing (57) 295-303
The merging of multisensor image data is becoming a widely used procedure because of the complementary nature of various data sets. Ideally, the method used to merge data sets with high-spatial and high-spectral resolution should not distort the spectral characteristics of the high-spectral resolution data. This paper compares the results...
Selectivity and effectiveness of extractants used to release metals associated with organic matter
C. S.E. Papp, L.H. Filipek, K. S. Smith
1991, Applied Geochemistry (6) 349-353
Partial extraction procedures can be used to release metals associated with organic matter in natural materials. Reagents commonly employed for this purpose include hydrogen peroxide, Na hypochlorite and Na pyrophosphate. This study tested the selectivity of these reagents by comparing the amount...
