JKPLOT version 2.00: A device-independent plotting system written in QuickBasic for an IBM PC
J.O. Kork
1994, Computers & Geosciences (20) 31-40
Version 2.0 of JKPLOT is a simple, device-independent plotting system that can provide a base for building plotting facilities tailored to the needs of geologists. The programs were written in Microsoft QuickBasic for use on equipment compatible with an IBM personal computer. The system provides subroutines and functions for plotting...
Flood geomorphology of Arthurs Rock Gulch, Colorado: paleoflood history
C. F. Waythomas, R.D. Jarrett
1994, Geomorphology (11) 15-40
Episodic late Quaternary flooding is recorded by bouldery deposits and slackwater sediments along Arthurs Rock Gulch, an ephemeral stream west of Fort Collins, Colorado. Flood deposits consist of individual granodiorite and pegmatite boulders, boulder bars, and coarse overbank sediment that rest on...
Water resources data, Wyoming, water year 1993
S. A. Druse, W. R. Glass, G.F. Ritz, M.L. Smalley
1994, Water Data Report WY-93-1
Water resources data for the 1993 water year for Wyoming consists of records of stage, discharge and water quality of streams; stage and contents of lakes and reservoirs, and water levels and water quality of ground water. This report contains discharge records for 190 gaging stations; stage and contents for...
Applications of shallow high-resolution seismic reflection to various environmental problems
R. D. Miller, D.W. Steeples
1994, Journal of Applied Geophysics (31) 65-72
Shallow seismic reflection has been successfully applied to environmental problems in a variety of geologic settings. Increased dynamic range of recording equipment and decreased cost of processing hardware and software have made seismic reflection a cost-effective means of imaging shallow geologic targets. Seismic data possess sufficient resolution in many areas...
Changes in cortisol dynamics in wild and hatchery-reared juvenile coho salmon (Oncorhynchus kisutch) during smoltification
J. M. Shrimpton, N.J. Bernier, D.J. Randall
1994, Canadian Journal of Fisheries and Aquatic Sciences (51) 2179-2187
Geochemical soil sampling for deeply-buried mineralized breccia pipes, northwestern Arizona
K. J. Wenrich, R. M. Aumente-Modreski
1994, Applied Geochemistry (9) 431-454
Thousands of solution-collapse breccia pipes crop out in the canyons and on the plateaus of northwestern Arizona; some host high-grade uranium deposits. The mineralized pipes are enriched in Ag, As, Ba, Co, Cu, Mo, Ni, Pb, Sb, Se, V and Zn. These breccia pipes formed as sedimentary strata collapsed into...
Salinity increases in the navajo aquifer in southeastern Utah
D. L. Naftz, L.E. Spangler
1994, Water Resources Bulletin (30) 1119-1135
Salinity increases in water in some parts of the Navajo aquifer in southeastern Utah have been documented previously. The purpose of this paper is to use bromide, iodide, and chloride concentrations and del oxygen-18 and deuterium values in water from the study area to determine if oil-field brines (OFB) could...
Bioaccumulation of selenium from natural geologic sources in western states and its potential consequences
T. S. Presser, M. A. Sylvester, W. H. Low
1994, Environmental Management (18) 423-436
Ecological impacts of water-quality problems have developed in the western United States resulting from the disposal of seleniferous agricultural wastewater in wetland areas. Overt effects of selenium toxicosis occurred at five areas where deformities of wild aquatic birds were similar to those first observed at Kesterson National Wildlife Refuge in...
A precise 232Th-208Pb chronology of fine-grained monazite: Age of the Bayan Obo REE-Fe-Nb ore deposit, China
Jingyuan Wang, M. Tatsumoto, X. Li, W. R. Premo, E. C. T. Chao
1994, Geochimica et Cosmochimica Acta (58) 3155-3169
We have obtained precise Th-Pb internal isochron ages on monazite and bastnaesite for the world's largest known rare earth elements (REE)-Fe-Nb ore deposit, the Bayan Obo of Inner Mongolia, China. The monazite samples, collected from the carbonate-hosted ore zone, contain extremely small amounts of uranium (less than 10 ppm) but...
Suspended sediments of the modern Amazon and Orinoco rivers
R.H. Meade
1994, Quaternary International (21) 29-39
The Amazon and Orinoco Rivers are massive transcontinental conveyance systems for suspended sediment. They derive about 90% of their sediment from the Andes that support their western headwaters, transport it for thousands of kilometers across the breadth of the continent and deposit it in the coastal zones of the Atlantic....
Degradation of methyl bromide in anaerobic sediments
R.S. Oremland, L.G. Miller, F.E. Strohmaler
1994, Environmental Science & Technology (28) 514-520
No abstract available....
Tectonic trends of the northern part of the Paradox Basin, southeastern Utah and southwestern Colorado, as derived from Landsat multispectral scanner imaging and geophysical and geologic mapping: Uncontrolled X-band radar mosaic of the western part of the Moab 1° x 2° quadrangle, southeastern Utah and southwestern Colorado
Jules D. Friedman, James E. Case, Shirley L. Simpson, Joan S. Heller
1994, Bulletin 2000-C,D
No abstract available....
An inverted metamorphic field gradient in the central Brooks Range, Alaska and implications for exhumation of high-pressure/low-temperature metamorphic rocks
B. Patrick, A.B. Till, W.S. Dinklage
1994, LITHOS (33) 67-83
During exhumation of the Brooks Range internal zone, amphibolite-facies rocks were emplaced atop the blueschist/greenschist facies schist belt. The resultant inverted metamorphic field gradient is mappable as a series of isograds encountered as one traverses up structural section. Amphibolite-facies metamorphism occurred at ??? 110 Ma as determined from 40Ar...
1993 Table of standard atomic weights abridged to five significant figures
T.B. Coplen, N.N. Greenwood, H.S. Peiser
1994, Inorganica Chimica Acta (217) 217-218
[No abstract available]...
Modeling surficial sand and gravel deposits
J. D. Bliss, N.J. Page
1994, Nonrenewable Resources (3) 237-249
Mineral-deposit models are an integral part of quantitative mineral-resource assessment. As the focus of mineral-deposit modeling has moved from metals to industrial minerals, procedure has been modified and may be sufficient to model surficial sand and gravel deposits. Sand and gravel models are needed to assess resource-supply analyses for planning...
Biology of subyearling carp (Cyprinus carpio) in the Juniata River, Pennsylvania
J. H. Johnson, D. S. Dropkin
1994, Journal of the Pennsylvania Academy of Science (68) 34-35
The precision of wet atmospheric deposition data from national atmospheric deposition program/national trends network sites determined with collocated samplers
M.A. Nilles, J.D. Gordon, L.J. Schroder
1994, Atmospheric Environment (28) 1121-1128
A collocated, wet-deposition sampler program has been operated since October 1988 by the U.S. Geological Survey to estimate the overall sampling precision of wet atmospheric deposition data collected at selected sites in the National Atmospheric Deposition Program and National Trends Network (NADP/NTN). A duplicate set of wet-deposition sampling instruments was...
The 1989-1990 eruption of Redoubt Volcano, Alaska: impacts on aircraft operations
T. J. Casadevall
1994, Journal of Volcanology and Geothermal Research (62) 301-316
The December 1989–June 1990 eruption of Redoubt Volcano affected commercial and military air operations in the vicinity of Anchorage, Alaska. These effects were due to the direct impact of volcanic ash on jet aircraft, as well as to the rerouting and cancellations of flight operations owing to eruptive activity. Between...
Uranium-Series Ages of Marine Terrace Corals from the Pacific Coast of North America and Implications for Last-Interglacial Sea Level History
D.R. Muhs, G. L. Kennedy, T. K. Rockwell
1994, Quaternary Research (42) 72-87
Few of the marine terraces along the Pacific coast of North America have been dated using uranium-series techniques. Ten terrace sequences from southern Oregon to southern Baja California Sur have yielded fossil corals in quantities suitable for U-series dating by alpha spectrometry. U-series-dated terraces representing the ???80,000 yr sea-level high...
Potential for seepage erosion of landslide dam
W. Meyer, R. L. Schuster, M. A. Sabol
1994, Journal of Geotechnical Engineering (120) 1211-1229
The failure potential of the debris-avalanche dam at Castle Lake near Mount St. Helens, Washington, by three processes of seepage erosion (1) Heave; (2) piping; and (3) internal erosion, is examined. Results indicated that the dam is stable against piping but potentially locally unstable against heave. -from Authors...
Precursory swarms of long-period events at Redoubt Volcano (1989-1990), Alaska: Their origin and use as a forecasting tool
B. A. Chouet, R.A. Page, C.D. Stephens, J.C. Lahr, J.A. Power
1994, Journal of Volcanology and Geothermal Research (62) 95-135
During the eruption of Redoubt Volcano from December 1989 through April 1990, the Alaska Volcano Observatory issued advance warnings of several tephra eruptions based on changes in seismic activity related to the occurrence of precursory swarms of long-period (LP) seismic events (dominant period of about 0.5 s). The initial eruption...
Isotopic Approach to Soil Carbonate Dynamics and Implications for Paleoclimatic Interpretations
E. G. Pendall, J.W. Harden, S.E. Trumbore, O.A. Chadwick
1994, Quaternary Research (42) 60-71
The radiocarbon content and stable isotope composition of soil carbonate are best described by a dynamic system in which isotopic reequilibration occurs as a result of recurrent dissolution and reprecipitation. Depth of water penetration into the soil profile, as well as soil age, determines the degree of carbonate isotope reequilibration....
Modeling and analysis of the 1949 Narrows landslide, Tacoma, Washington
A.F. Chleborad
1994, Bulletin of the Association of Engineering Geologists (31) 305-327
A large landslide failed catastrophically along steep, 90-m (300-ft) high bluffs overlooking the waters of Puget Sound at Tacoma, Washington, in April of 1949, three days after the region was struck by a magnitude 7.1 earthquake. The area of failure was investigated to...
New Madrid 3
Douglas V. Prose
1994, Open-File Report 94-179-N
Hydrologic data for the Big Spring basin, Clayton County, Iowa, water year 1991
S. J. Kalkhoff, R.L. Kuzniar
1994, Open-File Report 94-56
Hydrologic data were collected in the Big Spring Basin located in Clayton County, Iowa, during the 1991 water year. The data were collected by the U.S. Geological Survey in cooperation with the Iowa Department of Natural Resources, Geological Survey Bureau, to provide information on variation and movement of agricultural chemicals...
