Conversion of Cartesian coordinates from and to Generalized Balanced Ternary addresses
Jan W. van Roessel
1988, Photogrammetric Engineering and Remote Sensing (54) 1565-1570
Hexagonal grids have several advantages over square grids, such as a greater angular resolution and unambiguous connectivity. The Generalized Balanced Ternary (GBT) system is a spatial addressing method for hexagonal grids in which the hexagons are arranged in hierarchical aggregates, and which accommodates vector operations in GBT space. Efficient algorithms...
History of significant earthquakes in the Parkfield area
W. H. Bakun
1988, Earthquakes & Volcanoes (USGS) (20) 45-51
Seismicity on the San Andreas fault near Parkfield occurs in a tectonic section that differs markedly from neighboring sections along the San Andreas to the northwest and to the southeast. Northwest of the Parkfield section, small shocks (magnitudes of less than 4) do occur frequently, but San Andreas movement occurs...
State public policy issues involved with the Parkfield prediction experiment.
R. Andrews, J. Goltz
1988, Earthquakes & Volcanoes (USGS) (20) 87-91
The earthquake-prediction experiment at Parkfield may well be the most important such experiment currently underway worldwide. Its importance, however, extends beyond the scientific data that will be gathered and whether those data that will be gathered and whether those data can provide reliable prediction methods. Important public policy lessons are...
An integrated approach for automated cover-type mapping of large inaccessible areas in Alaska
Michael D. Fleming
1988, Photogrammetric Engineering and Remote Sensing (54) 357-362
The lack of any detailed cover type maps in the state necessitated that a rapid and accurate approach to be employed to develop maps for 329 million acres of Alaska within a seven-year period. This goal has been addressed by using an integrated approach to computer-aided analysis which combines efficient...
Geophysical instrumentation near Parkfield
W. H. Bakun
1988, Earthquakes & Volcanoes (USGS) (20) 60-71
The geophysical instrumentation operated by the U.S Geological Survey and others near Parkfield is designed to monitor ongoing tectonic processes that generate earthquakes and to record the strong shaking that results from larger shocks and its effects. this discussion focuses on the former objectives; the latter is discussed in the...
The USGS plan for short-term prediction of the anticipated Parkfield earthquake
W. H. Bakun
1988, Earthquakes & Volcanoes (USGS) (20) 83-86
Aside from the goal of better understanding the Parkfield earthquake cycle, it is the intention of the U.S Geological Survey to attempt to issue a warning shortly before the anticipated earthquake. Although short-term earthquake warnings are not yet generally feasible, the wealth of information available for the previous significant Parkfield...
Differences in visible and near-IR responses, and derived vegetation indices, for the NOAA-9 and NOAA-10 AVHRRs: a case study
Kevin P. Gallo, Jeffery C. Eidenshink
1988, Photogrammetric Engineering and Remote Sensing (54) 485-490
This study evaluates the differences in the visible and near-IR responses of the Advanced Very High Resolution Radiometers (AVHRR) of the National Oceanic and Atmospheric Administration (NOAA)-9 and -10 satellites for coincident sample locations. The study also evaluates the differences in vegetation indices computed from those data. Data were acquired...
Hydraulic map of Crystal Rapids, Grand Canyon, Arizona
Susan W. Kieffer
1988, IMAP 1897-H
No abstract available....
Low molecular weight species in humic and fulvic fractions
M. A. Wilson, P. J. Collin, Ronald L. Malcolm, E. Michael Perdue, P. Cresswell
1988, Organic Geochemistry (12) 7-12
Fourier transform solution 1H nuclear magnetic resonance (NMR) spectrometry with homogated water peak irradiation is a useful method for detecting low molecular weight substances in humic extracts. Succinate, acetate, methanol, formate, lactate and some aryl methoxyl compounds have been detected in extracts from a wide range of sources. In view of...
Intermediate-scale vegetation mapping of Innoko National Wildlife Refuge, Alaska using Landsat MSS digital data
Stephen S. Talbot, Carl J. Markon
1988, Photogrammetric Engineering and Remote Sensing (54) 377-383
A Landsat-derived vegetation map was prepared for lnnoko National Wildlife Refuge. The refuge lies within the northern boreal subzone of northwestern central Alaska. Six major vegetation classes and 21 subclasses were recognized: forest (closed needleleaf, open needleleaf, needleleaf woodland, mixed, and broadleaf); broadleaf scrub (lowland, upland burn regeneration, subalpine); dwarf...
Geothermal gradients in the conterminous United States
M. Nathenson, M. Guffanti
1988, Journal of Geophysical Research Solid Earth (93) 6437-6450
Geothermal gradients from published temperature/depth measurements in drill holes generally deeper than 600 m are used to construct a temperature gradient map of the conterminous United States. The broadly contoured map displays 284 temperature gradients that are applicable to a depth of 2 km. In terms of the number of...
Teleseismic and near-field analysis of the Nahanni earthquakes in the Northwest Territories, Canada
G. L. Choy, J. Boatwright
1988, Bulletin of the Seismological Society of America (78) 1627-1652
The analysis of the Nahanni earthquakes of October 5, 1985 (MS 6.6), and December 23, 1985 (MS 6.9), will have important implications for the assessment of seismic hazards in intraplate environments. To maximize the information available to seismic engineers, broadband data recorded teleseismically are analyzed jointly with strong-motion data recorded...
U.S. Geological Survey deep seismic reflection profile across the Gulf of Maine
Deborah R. Hutchinson, Kim D. Klitgord, Myung W. Lee, Anne M. Trehu
1988, Geological Society of America Bulletin (100) 172-184
Deep seismic reflection and magnetic data suggest that the Gulf of Maine is underlain by four crustal blocks of differing reflection and magnetic character. Two of these blocks, the Gulf of Maine fault zone and adjacent central plutonic zone, can be correlated with Avalonian rocks in southern New England and...
Source-rock evaluation of outcrop samples from Vanuatu (Malakula, Espiritu Santo, Maewo, and Pentecost)
Binyamin Buchbinder, Robert B. Halley
1988, Book chapter, Geology and offshore resources of Pacific Island Arcs: Vanuatu Region
Thirty-nine outcrop samples of mudstones, siltstones, and limestones were collected for source-rock evaluation of the sedimentary column in Vanuatu. Twenty-nine samples showing the least evidence of oxidation were selected for total organic analysis from the Miocene Matanui Group and Port Sandwich Formation in Malakula, and from the Miocene Ilava, Peteao,...
Causes of two slope-failure types in continental-shelf sediment, northeastern Gulf of Alaska
William C. Schwab, Homa J. Lee
1988, Journal of Sedimentary Research (58) 1-11
Slumps and sediment-gravity flows have been identified in Holocene glaciomarine sediment on declivities less than 1.3 degrees on the Gulf of Alaska continental shelf. Geologic and geotechnical investigation suggest that the processes responsible for these slope failures are earthquake and storm-wave loading, coupled with cyclic degradation of the sediment-shear strength....
Carbonate to siliciclastic periplatform sediments: southwest Florida
Charles W. Holmes
1988, Developments in Sedimentology (42) 271-287
Three distinct carbonate deposits have been identified on the slope and adjacent sea floor of the southwestern Florida Platform: (1) reef talus, recognized by shape and location, found on the upper slope of the Yucatan Channel and also east of the Marquesas Keys; (2) hemipelagic sediments, with complex sigmoid-oblique...
Fate of acetone in an outdoor model stream in southern Mississippi, U.S.A.
R. E. Rathbun, D. W. Stephens, D.J. Shultz, D. Y. Tai
1988, Journal of Hydrology (104) 181-209
The fate of acetone in water was investigated in an outdoor model stream located in southern Mississippi, U.S.A. Acetone was injected continuously for 32 days resulting in small milligram-perliter concentrations in the stream. Rhodamine-WT dye was injected at the beginning and at the end of the study to determine the...
Dabbling duck harvest dynamics in the Central Valley of California--implications for recruitment
M. R. Miller, J. Beam, D.P. Connelly
M.W. Weller, editor(s)
1988, Book chapter, Waterfowl in winter
Age and sex ratios and body weights were obtained for northern pintails (Anas acuta), mallards (A. platyrhynchos), American wigeon (A. americana), green-winged teal (A. crecca), and northern shovelers (A. clypeata) shot at Mendota State Wildlife Area in the San Joaquin Valley (SANJV) and at Sacramento National Wildlife Refuge in the...
Ground water and the rural homeowner
Roger M. Waller
1988, Report
As the salesmen sang in the musical The Music Man, "You gotta know the territory." This saying is also true when planning to buy or build a house. Learn as much as possible about the land, the water supply, and the septic system of the house before buying or building....
Organic geothermometry of petroleum from Escanaba Trough, offshore northern California
Keith A. Kvenvolden, John B. Rapp, Frances D. Hostettler, J. David, George E. Claypool
1988, Organic Geochemistry (13) 351-355
We have measured the extent of hopane and sterane isomerization and of monoaromatic-steroid-hydrocarbon aromatization in a sample of hydrothermally derived petroleum from the Escanaba Trough, a sediment-covered, volcanically active ridge axis. The results, along with kinetic parameters, predict the possible time-temperature history of the petrolum-forming process for this sample. The...
Hematozoan parasites of Rio Grande wild turkeys from southern Texas (USA)
Marc D. Castle, Beth A. Christensen, Tonie E. Rocke
1988, Journal of Wildlife Diseases (24) 88-96
One hundred twenty-three of 300 blood samples (41%) taken from Rio Grande wild turkeys (Meleagris gallopavo intermedia) from three locations in southern Texas (Welder Wildlife Refuge, Chaparrosa Ranch, and Campo Alegre Ranch) and subinoculated into domestic broad-breasted white turkey poults were positive for a Plasmodium (Novyella) sp. Analysis of blood films from...
Lead poisoning in six captive avian species
W. Nelson Beyer, James W. Spann, Louis Sileo, J. Christian Franson
1988, Archives of Environmental Contamination and Toxicology (17) 121-130
Red-winged blackbirds (Agelaius phoeniceus), brown-headed cowbirds (Molothrus ater), common grackles (Quiscalus quiscula), mallards (Anas platyrhynchos), northern bobwhites (Colinus virginianus), and eastern screech-owls (Otus asio) were poisoned with a concentration of lead (Pb) acetate in the diet which was...
Hydrodynamics of Denver basin: Explanation of subnormal fluid pressures
Kenneth Belitz, John D. Bredehoeft
1988, American Association of Petroleum Geologists Bulletin (72) 1334-1359
Anomalously low fluid potential (and hence subnormal fluid pressure) is found in Mesozoic and Paleozoic rocks of the Denver basin. The potentiometric surface for the Dakota and basal Cretaceous sandstones is 2,000-3,000 ft (600-900 m) beneath the land surface in parts of the Denver basin in Colorado and Nebraska. The...
Salton Sea Scientific Drilling Program
J.H. Sass
1988, Earthquakes & Volcanoes (USGS) (20) 156-160
This article briefly describes the progress of drilling in the Salton Sea to depths exceeding 10 000 ft (3050 m) in the search for geothermal energy supplies. -A.Scarth...
Origin of metaluminous and alkaline volcanic rocks of the Latir volcanic field, northern Rio Grande rift, New Mexico
C.M. Johnson, P. W. Lipman
1988, Contributions to Mineralogy and Petrology (100) 107-128
Volcanic rocks of the Latir volcanic field evolved in an open system by crystal fractionation, magma mixing, and crustal assimilation. Early high-SiO2 rhyolites (28.5 Ma) fractionated from intermediate compositionmagmas that did not reach the surface. Most precaldera lavas have intermediate-compositions, from olivine basaltic-andesite (53% SiO2) to quartz latite (67% SiO2)....
