Scanning electron microscope observations of sublimates from Merapi Volcano, Indonesia
Robert B. Symonds
1993, Geochemical Journal (27) 337-350
Sublimates were sampled from high-temperature (up to 800°C) fumaroles at Merapi volcano, Indonesia in January 1984. Sampling is accomplished by inserting silica tubes into high-temperature vents. Volcanic gas flows through the tubes and sublimates precipitate on the inner walls in response to the temperature gradient. With decreasing temperature (800–500°C) in...
Inorganic geochemistry of domed peat in Indonesia and its implication for the origin of mineral matter in coal
Sandra G. Neuzil, Supardi, C. Blaine Cecil, Jean S. Kane, Kadar Soedjono
1993, Special Paper of the Geological Society of America (286) 23-44
The inorganic geochemistry of three domed ombrogenous peat deposits in Riau and West Kalimantan provinces, Indonesia, was investigated as a possible modern analogue for certain types of low-ash, low-sulfur coal. Mineral matter entering the deposits is apparently limited to small amounts from the allogenic sources of dryfall, rainfall, and...
Controlled photomosaic of the MTM 40312 Quadrangle, northern Arabia region of Mars
Water Resources Division, U.S. Geological Survey, National Aeronautics and Space Administration
1993, IMAP 2337
This photomosaic covers part of an area of special scientific interest on Mars. It is published in a series designed to support topical studies, which is not expected to result in systematic coverage of the plant. The mosaic was compiled by digital methods described by Batson (1987) and Edwards (1987)....
Restoration ecology: longterm evaluation as an essential feature of rehabilitation
John E. Gannon
1993, Buffalo Environmental Law Journal (1) 267-277
In its brief existence as a recognized scientific discipline, restoration ecology has focused almost exclusively on terrestrial and wetland habitat. As a consequence, aquatic restoration and rehabilitation, an important component of restoration ecology is a relatively new discipline. This article examines the ecosystem approach to rehabilitation of the...
Patterns of orographic uplift in the Sierra Nevada and their relationship to upper-level atmospheric circulation
Edward Aguado, Daniel R. Cayan, Brian D. Reece, Larry Riddle
1993, Conference Paper, Proceedings of the ninth annual pacific climate (PACLIM) workshop
We examine monthly and seasonal patterns of precipitation across various elevations of the eastern Central Valley of California and the Sierra Nevada. A measure of the strength of the orographic effect called the “precipitation ratio” is calculated, and we separate months into four groups based on being wet or dry...
Deuterium fractionation as water diffuses into silicic volcanic ash
Irving Friedman, J.D. Gleason, R.A. Sheppard, A.J. Gude
1993, Book chapter, Climate change in continental isotopic records
No abstract available...
GPS network operations for the International GPS Geodynamics Service
Ruth E. Neilan
1993, Conference Paper, Permanent satellite tracking networks for geodesy and geodynamics
As GPS technology comes of age in the 1990’s, it is evident that an internationally sponsored GPS tracking system is called for to provide consistent, timely ground tracking data and data products to the geophysical community. The planning group for the International GPS Geodynamics Service (IGS), sponsored by the International...
A rainfall intensity-duration threshold for landslides in a humid- tropical environment, Puerto Rico
M. C. Larsen, A. Simon
1993, Geografiska Annaler, Series A (75 A) 13-23
Landslides are triggered by factors such as heavy rainfall, seismic activity, and construction on hillslopes. The leading cause of landslides in Puerto Rico is intense and/or prolonged rainfall. A rainfall threshold for rainfall-triggered landsliding is delimited by 256 storms that occurred between 1959 and 1991 in the central mountains of...
Sensitivity of crustal deformation instruments to changes insecular rate
John O. Langbein, Eddie Quilty, Katherine Breckenridge
1993, Geophysical Research Letters (20) 85-88
A variety of instruments (including borehole strainmeters, water wells, creepmeters, laser ranging and differential magnetometers) are used to monitor crustal deformation in areas that are prone to geologic hazards such as earthquakes and volcanic eruptions. In monitoring the deformation, one typically examines the data for either a change in rate,...
Gravity and magnetic studies of the Wind River Reservation, Wyoming
R.P. Kucks
1993, Conference Paper, Special symposium on oil and gas and other resources of the Wind River basin, Wyoming
No abstract available...
Population trends of Alaskan seabirds
Scott A. Hatch
1993, Pacific Seabird Group Bulletin (20) 3-12
Ornithology in Alaska formally began with the observations of Georg Wilhelm Steller during Vitus Bering's voyage of discovery in 1741. Steller's journal makes brief mention of various seabird species he encountered during his travels in the Gulf of Alaska and Aleutian Islands (Frost and Engel 1988). For more than 100...
Implementation of biomarker-based studies
John J. Stegeman, Brenda E. Ballachey, J. Bickham, B. Hocker, S. Kennedy, H. Thompson, A.D. Vethaak
David B. Peakall, Lee R. Shugart, editor(s)
1993, Book chapter, Biomarkers: Research and application in the assessment of environmental health: Proceedings of the NATO advanced research workshop on biological markers
Biomarkers may be used to determine chemical exposure and effects in several important ways. These include (1) evaluation of new agricultural or industrial chemicals for effects, (2) screening of municipal or industrial effluents, (3) determining the geographic distribution of chemical effects in the environment and their changes over time, (4)...
Deposition of Franciscan Complex cherts along the paleoequator and accretion to the American margin at tropical paleolatitudes
J.T. Hagstrum, B.L. Murchey
1993, Geological Society of America Bulletin (105) 766-778
Red radiolarian cherts from three localities within the Franciscan subduction complex of northern California contain three components of remanent magnetization which are best isolated by progressive thermal demagnetization. The first component, usually removed by 300 °C, has an in situ direction similar to the present...
Teleseismic tomography; lithospheric structure of the San Andreas Fault system in northern and central California
H.M. Benz, George Zandt
H. M. Iyer, Kazuro Hirahara, editor(s)
1993, Book chapter, Seismic tomography: Theory and practice
No abstract available ...
Generalized statistical model of the Edwards Aquifer
W.H. Asquith, M.E. Jennings
1993, Conference Paper, Proceedings; Texas sections jointspring meeting and Texas hydrology roundup
No abstract available...
Subsurface stratigraphic cross section of Lower and Upper Cretaceous rocks in the south eastern Wind River basin, Wyoming
T.M. Finn
1993, Conference Paper, Wyoming Geological Association special symposium on oil and gas and other resources of the Wind River basin, Wyoming
No abstract available ...
Scourata bridge over the Weldon River, Iowa.
E.E. Fischer
1993, Conference Paper, 1993 national conference on Hydraulic engineering
No abstract available ...
Architecture of Fort Union paleovalley conglomerates related to aquifer potential in the western Wind River basin
R. M. Flores, A.C. Clark, C. W. Keighin
1993, Conference Paper, Wyoming Geological Association special symposium on oil and gas and other resources of the Wind River basin, Wyoming
No abstract available ...
Reservoir anisotropy and facies stratigraphic framework in the Paleocene Fort Union Formation, western Wind River basin
R. M. Flores, C. W. Keighin
1993, Conference Paper
Investigation of reservoir anisotropy and lithofacies stratigraphic framework in the Fort Union Formation in western Wind River Basin, Wyoming focused on excellent surface exposures in the Shotgun Butte, Eagle Point, and Shotgun Bench synclines, and in the Merriam anticline area of the Wind River Reservation (Fig. 1)....
Least tern and piping plover nesting at sand pits in Nebraska
John G. Sidle, E.M. Kirsch
1993, Colonial Waterbirds (16) 139-148
Endangered Least Terns (Sterna antillarum) and threatened Piping Plovers (Charadrius melodus) nest at commercial sand and gravel mining operations (sand pits) along the Platte River system in Nebraska. Sandbar habitat has been disappearing since the early 1900's along the Platte River system, but numbers of sand pits have increased. We...
The role of water exchange between a stream channel and its hyporheic zone in nitrogen cycling at the terrestrial-aquatic interface
F.J. Triska, J.H. Duff, R.J. Avanzino
1993, Hydrobiologia (251) 167-184
The subsurface riparian zone was examined as an ecotone with two interfaces. Inland is a terrestrial boundary, where transport of water and dissolved solutes is toward the channel and controlled by watershed hydrology. Streamside is an aquatic boundary, where exchange of surface water and dissolved solutes is bi-directional and flux...
Fracture zone traces across the North Pacific Cretaceous Quiet Zone and their tectonic implications
Tanya Atwater, John Sclater, David Sandwell, Jeff Severinghaus, Michael S. Marlow
1993, Book chapter, The Mesozoic Pacific: Geology, tectonics, and volcanism
No abstract available ...
Hydraulics of Alaska steeppass fishway model A40
M. Odeh
1993, Research Information Bulletin 95
No abstract available at this time...
Updating our thinking on the role of human activity in wolf recovery
L. David Mech
1993, Research Information Bulletin 57
It is common for land managers and administrators involved in wolf (Canis lupus) management to assume that human development within wolf habitat is a hindrance to wolf recovery. Thus, researchers are often asked questions like We are planning to build a new dock and parking area on Wolf Lake; how...
[Book Review] Chance, Chaos, and More, by David Ruelle
Douglas H. Johnson
1993, Prairie Naturalist (25) 359-360
Review of: Chance and Chaos. David Ruelle. Princeton University Press (April 5, 1993). 214 p. ISBN-10: 0691021007....
