Habitat Suitability Index Models: Ruffed grouse
Brian S. Cade, Patrick J. Sousa
1985, FWS/OBS 82/10.86
A review and synthesis of existing information were used to develop a Habitat Suitability Index (HSI) model for the ruffed grouse (Bonasa umbellus). The model consolidates habitat use information into a framework appropriate for field application, and is scaled to produce an index between 0.0 (unsuitable habitat) to 1.0 (optimum...
A kinematic model for the structure of lee-side (dune-like) deposits
Ralph E. Hunter
1985, Sedimentology (32) 409-422
A kinematic model for the structure of the lee-side deposit of a dune-like bedform, Gilbert-type delta, or similar step is developed, based on the assumptions that initial deposition is entirely by grainfall, that the rate of deposition decreases as a power function of distance downflow from the brink of the...
Rock mechanics observations pertinent to the rheology of the continental lithosphere and the localization of strain along shear zones
Stephen H. Kirby
1985, Tectonophysics (119) 1-27
Emphasized in this paper are the deformation processes and rheologies of rocks at high temperatures and high effective pressures, conditions that are presumably appropriate to the lower crust and upper mantle in continental collision zones. Much recent progress has been made in understanding the flexure of the oceanic lithosphere using...
Accretion tectonics and crustal structure in Alaska
P.J. Coney, D. L. Jones
1985, Tectonophysics (119) 265-283
The entire width of the North American Cordillera in Alaska is made up of "suspect terranes". Pre-Late Cretaceous paleogeography is poorly constrained and the ultimate origins of the many fragments which make up the state are unclear. The Prince William and Chugach terranes accreted since Late Cretaceous time and represent...
Structure, porosity and stress regime of the upper oceanic crust: Sonic and ultrasonic logging of DSDP Hole 504B
Robin Newmark, Roger N. Anderson, Daniel Moos, Mark D. Zoback
1985, Tectonophysics (118) 1-42
The layered structure of the oceanic crust is characterized by changes in geophysical gradients rather than by abrupt layer boundaries. Correlation of geophysical logs and cores recovered from DSDP Hole 504B provides some insight into the physical properties which control these gradient changes. Borehole televiewer logging in Hole 504B provides...
Characterization of the Sukinda and Nausahi ultramafic complexes, Orissa, India by platinum-group element geochemistry
N.J. Page, P.K. Banerji, J. Haffty
1985, Precambrian Research (30) 27-41
Samples of 20 chromitite, 14 ultramafic and mafic rock, and 9 laterite and soil samples from the Precambrian Sukinda and Nausahi ultramafic complexes, Orissa, India were analyzed for platinum-group elements (PGE). The maximum concentrations are: palladium, 13 parts per billion (ppb); platinum, 120 ppb; rhodium, 21 ppb; iridium, 210 ppb;...
Crystalline gold in soil and the problem of supergene nugget formation: Freezing and exclusion as genetic mechanisms
J.R. Watterson
1985, Precambrian Research (30) 321-335
Many of the world's richest gold placer deposits now occur in cold regions despite differences in their climatic history. It therefore seems possible that there may be some fundamental connection between freezing climates and the local chemical behavior of gold in the weathering cycle. This hypothesis, along with the problematical...
Experimental studies in natural groundwater-recharge dynamics: The analysis of observed recharge events
M. Sophocleous, C. A. Perry
1985, Journal of Hydrology (81) 297-332
The amounts and time distribution of groundwater recharge from precipitation over an approximately 19-month period were investigated at two instrumented sites in south-central Kansas. Precipitation and evapotranspiration sequences, soil-moisture profiles and storage changes, water fluxes in the unsaturated zone and hydraulic gradients in the saturated zone at various depths, soil...
Hydraulic gradient control for groundwater contaminant removal
Atwood D. Fisher, S.M. Gorelick
1985, Journal of Hydrology (76) 85-106
The Rocky Mountain Arsenal near Denver, Colorado, U.S.A., is used as a realistic setting for a hypothetical test of a procedure that plans the hydraulic stabilization and removal of a groundwater contaminant plume. A two-stage planning procedure successfully selects the best wells and their optimal pumping/recharge schedules to contain the...
Salt-water-freshwater transient upconing - An implicit boundary-element solution
M. Kemblowski
1985, Journal of Hydrology (78) 35-47
The boundary-element method is used to solve the set of partial differential equations describing the flow of salt water and fresh water separated by a sharp interface in the vertical plane. In order to improve the accuracy and stability of the numerical solution, a new implicit scheme was developed for...
Evaluating the hydraulic effects of changes in aquifer elevation using curvilinear coordinates
E. Weiss
1985, Journal of Hydrology (81) 253-275
The groundwater flow equation is written in curvilinear coordinates whose coordinate surfaces coincide with the top and bottom surfaces of folded layers of aquifers. The coordinates are general enough for these surfaces to coincide for almost all groundwater systems. The terms of the finite-difference approximation for the flow equation can...
Quantitative analysis of saltwater-freshwater relationships in groundwater systems-A historical perspective
T. E. Reilly, A.S. Goodman
1985, Journal of Hydrology (80) 125-160
Although much progress has been made toward the mathematical description of saltwater-freshwater relationships in groundwater systems since the late 19th century, the advective and dispersive mechanisms involved are still incompletely understood. This article documents the major historical advances in this subject and summarizes the major direction of current studies. From...
Analysis and modeling of Palmer's drought index series-Comment
W.M. Alley
1985, Journal of Hydrology (80) 179-185
No abstract available. ...
Quaternary sedimentation of the Alaskan Beaufort shelf: Influence of regional tectonics, fluctuating sea levels, and glacial sediment sources
David A. Dinter
1985, Tectonophysics (114) 133-161
The offshore stratigraphy of the Quaternary Gubik Formation of Arctic Alaska has been studied on high-resolution seismic profiles with a maximum sub-seafloor penetration of about 100 m. In general, marine transgressive subunits of the Gubik Formation are wedge-shaped on the shelf, thickening slightly seaward to the shelf break, beyond which...
Determination of gold, indium, tellurium and thallium in the same sample digest of geological materials by atomic-absorption spectroscopy and two-step solvent extraction
A.E. Hubert, T. T. Chao
1985, Talanta (32) 568-570
A rock, soil, or stream-sediment sample is decomposed with hydrofluoric acid, aqua regia, and hydrobromic acid-bromine solution. Gold, thallium, indium and tellurium are separated and concentrated from the sample digest by a two-step MIBK extraction at two concentrations of hydrobromic add. Gold and thallium are first extracted from 0.1M hydrobromic acid medium,...
A rapid method for determining tin and molybdenum in geological samples by flame atomic-absorption spectroscopy
Eric P. Welsch
1985, Talanta (32) 996-998
The proposed method uses a lithium metaborate fusion, dissolution of the fusion bead in 15% vv hydrochloric acid, extraction into a 4% solution of trioctylphosphine oxide in methyl isobutyl ketone, and aspiration into a nitrous oxide-acetylene flame. The limits of detection for tin and molybdenum are 1.0 and 0.5 ppm,...
A method for the determination of vanadium and iron oxidation states in naturally occurring oxides and silicates
R. B. Wanty, M. B. Goldhaber
1985, Talanta (32) 395-398
A valence-specific analytical method for determining V3+ in ore minerals has been developed that involves two steps: dissolution of a mineral sample without disturbing the V3+/Vtot ratio, followed by determination of V3+ in the presence of V4+. The samples are dissolved in a mixture of hydrofluoric and sulphuric acids at 100° in Teflon-lined...
Post-Eruption Changes in Channel Geometry of Streams in the Toutle River Drainage Basin, 1980-82, Mount St. Helens, Washington
D. F. Meyer, K. Michael Nolan, J.E. Dodge
1985, Open-File Report 85-412
The May 18, 1980, eruption of Mount St. Helens, Washington, generated a debris avalanche, lateral blast, lahars, and tephra deposits that altered mainstem and tributary channels within the Toutle River drainage basin. Channel cross sections were monumented and surveyed on North Fork Toutle River and its tributaries, on South Fork...
Water resources data, Michigan, water year 1984
John B. Miller, John L. Oberg, Theodore Sieger Jr.
1985, Water Data Report MI-84-1
Water resources data for the 1984 water year for Michigan consist of records of stage, discharge, and water quality of streams; stage, contents, and water quality of lakes and reservoirs; and water levels and water temperature of ground water. This report contains discharge records for 142 gaging stations; stage only...
Hydrology of area 58, northern Great Plains and Rocky Mountain coal provinces, Colorado and Utah
T.H. Chaney, T.D. Brooks, Gerhard Kuhn
1985, Open-File Report 85-479
Proceedings of workshop XXVIII on the Borah Peak, Idaho earthquake
Ross S. Stein, Robert C. Bucknam, editor(s)
1985, Open-File Report 85-290-A
A large earthquake leaves clues of its nature that can be interpreted only by a diverse group of scientists. We cannot hope to form a coherent picture of the Borah Peak shock, a rare Great Basin event, without listening to each other and reflecting on the historical and geological record...
Maps showing distribution of tin in heavy-mineral concentrates, Richfield 1° x 2° quadrangle, Utah
William R. Miller, Jerry M. Motooka, John B. McHugh
1985, Miscellaneous Field Studies Map 1246-I
These maps are part of a folio of maps of the Richfield 1° x 2 ° quadrangle, Utah, prepared under the Conterminuous United States Mineral Assessment Program. Other publications in this folio are listed in the selected references.Located in west-central Utah, the Richfield quadrangle covers the eastern part of the...
Maps showing distribution of tungsten in heavy-mineral concentrates, Richfield 1° x 2° quadrangle, Utah
William R. Miller, Jerry M. Motooka, John B. McHugh
1985, Miscellaneous Field Studies Map 1246-J
These maps are part of a folio of maps of the Richfield 1° x 2 ° quadrangle, Utah, prepared under the Conterminuous United States Mineral Assessment Program. Other publications in this folio are listed in the selected references.Located in west-central Utah, the Richfield quadrangle covers the eastern part of the...
Maps showing distribution of copper in heavy-mineral concentrates, Richfield 1° x 2° quadrangle, Utah
William R. Miller, Jerry M. Motooka, John B. McHugh
1985, Miscellaneous Field Studies Map 1246-F
These maps are part of a folio of maps of the Richfield 1° x 2 ° quadrangle, Utah, prepared under the Conterminuous United States Mineral Assessment Program. Other publications in this folio are listed in the selected references.Located in west-central Utah, the Richfield quadrangle covers the eastern part of the...
Maps showing distribution of lead in heavy-mineral concentrates, Richfield 1° x 2° quadrangle, Utah
William R. Miller, Jerry M. Motooka, John B. McHugh
1985, Miscellaneous Field Studies Map 1246-G
These maps are part of a folio of maps of the Richfield 1° x 2 ° quadrangle, Utah, prepared under the Conterminuous United States Mineral Assessment Program. Other publications in this folio are listed in the selected references.Located in west-central Utah, the Richfield quadrangle covers the eastern part of the...
