Asymmetric measures of association, closed data, and multivariate analysis
M. Hohn, E.B. Nuhfer
1980, Journal of the International Association for Mathematical Geology (12) 235-246
The association between constant-sum variables Xiand Xjexpressed as percentages can be calculated as a product-moment correlation between Xiand Xj/(100 - Xi) and a correlation between Xjand Xi/(100 - Xj). An asymmetric, square matrix may be formed from these coefficients, and multivariate analysis performed by two methods: singular value decomposition and...
Heat flow and energetics of the San Andreas fault zone
A.H. Lachenbruch, J.H. Sass
1980, Journal of Geophysical Research Solid Earth (85) 6185-6223
Approximately 100 heat flow measurements in the San Andreas fault zone indicate (1) there is no evidence for local factional heating of the main fault trace at any latitude over a 1000-km length from Cape Mendocino to San Bernardino, (2) average heat flow is high (∼2 HFU, ∼80 mW m−2)...
Declination and inclination errors in experimentally deposited specularite-bearing sand
S.L. Bressler, D. P. Elston
1980, Earth and Planetary Science Letters (48) 227-232
Naturally disaggregated specularite-bearing sandstone from the Triassic Moenkopi Formation, artificially deposited in controlled magnetic fields of ∼5 × 10−2 mT, acquires a stable remanent magnetization that has systematic errors in inclination and declination. Inclinations about 12° shallower than the applied fields are...
U-Pb ages of uraniferous opals and implications for the history of beryllium, fluorine, and uranium mineralization at Spor Mountain, Utah
K.R. Ludwig, D. A. Lindsey, R. A. Zielinski, K. R. Simmons
1980, Earth and Planetary Science Letters (46) 221-232
The U-Pb isotope systematics of uraniferous opals from Spor Mountain, Utah, were investigated to determine the suitability of such material for geochronologic purposes, and to estimate the timing of uranium and associated beryllium and fluorine mineralization. The results indicate that uraniferous...
Geothermal system at 21°N, East Pacific Rise: physical limits on geothermal fluid and role of adiabatic expansion
J. L. Bischoff
1980, Science (207) 1465-1469
Pressure-volume-temperature relations for water at the depth of the magma chamber at 21°N on the East Pacific Rise suggest that the maximum subsurface temperature of the geothermal fluid is about 420°C. Both the chemistry of the discharging fluid and thermal balance considerations indicate that the effective water/rock ratios in the...
Reflections for the future
F. P. Meyer
R.L. Jenkins, J.G. Halusky, editor(s)
1980, Book chapter, Aquatic animal medicine: a state of the art
Abstract not submitted to date...
Chemical and physical characteristics of water in estuaries of Texas, October 1974-September 1975
W.B. Lind
1980, Texas Department of Water Resources Report 245
No abstract available....
Submarine volcanic features west of Kealakekua Bay, Hawaii
D.J. Fornari, J. P. Lockwood, P. W. Lipman, M. Rawson, A. Malahoff
1980, Journal of Volcanology and Geothermal Research (7) 323-337
Visual observations of submarine volcanic vents were made from the submersible vehicle DSV "Sea Cliff" in water depths between 1310 and 690 m, west of Kealakekua Bay, Hawaii. Glass-rich, shelly submarine lavas surround circular 1- to 3-m-diameter volcanic vents between 1050 and 690 m depth in an area west-northwest of...
Oil and gas resource assessment areas, U. S. Geological Survey, Geologic Division, 1980; Lower 48 states, regions 2 through 11, and 2A, 6A, and 11A
K. L. Varnes, A. B. Coury, G.L. Dolton, S. E. Frezon, A. S. Khan, R. S. Pike, R. B. Powers, E. W. Scott
1980, Open-File Report 81-84-C
No abstract available....
Lithologic and water-quality data from Troy Dry Lake, San Bernardino County, California
Roger D. Dockter
1980, Open-File Report 80-1035
U.S. Geological Survey...
Hafnium isotope variations in oceanic basalts
P. J. Patchett, M. Tatsumoto
1980, Geophysical Research Letters (7) 1077-1080
Routine low-blank chemistry and 0.01-0.04% precision on the ratio 176Hf/177Hf allows study of Hf isotopic variations, generated by β−-decay of 176Lu, in volcanic rocks derived from the suboceanic mantle. Normalized to 176Hf/177Hf = 0.7325, 176Hf/177Hf ranges from 0.2828 to 0.2835, based on 24 basalt samples. 176Hf/177Hf is positively correlated with 143Nd/144Nd, and...
Crystallization history of Kilauea Iki lava lake as seen in drill core recovered in 1967-1979
Rosalind Tuthill Helz
1980, Bulletin Volcanologique (43) 675-701
Kilauea Iki lava lake formed during the 1959 summit eruption, one of the most picritic eruptions of Kilauea Volcano in the twentieth century. Since 1959 the 110 to 122 m thick lake has cooled slowly, developing steadily thickening upper and lower crusts, with a lens of more molten lava in...
The age curves of sulfur and oxygen isotopes in marine sulfate and their mutual interpretation
George E. Claypool, William T. Holser, Isaac R. Kaplan, Hitoshi Sakai, Israel Zak
1980, Chemical Geology (28) 199-260
Three hundred new samples of marine evaporite sulfate, of world-wide distribution, were analyzed for δ34S, and 60 of these also for δ18O in the sulfate ion. Detailed δ34S age curves for Tertiary—Cretaceous, Permian—Pennsylvanian, Devonian, Cambrian and Proterozoic times document large variations in δ34S. A summary curve forδ18O also shows definite...
Petroleum geology of Kodiak Shelf, Alaska.
Michael A. Fisher
1980, American Association of Petroleum Geologists Bulletin (64) 1140-1157
Organic geochemical data show that Cenozoic rocks on Kodiak Island, in Albatross basin, and under the continental slope generally contain less than 0.5 wt. % organic carbon. Moreover, kerogen from all rocks analyzed is predominantly (60 to 100%) herbaceous; woody and coaly kerogens are present in secondary (20 to 40%)...
Palaeomagnetic polarity in a 930-m core from Searles valley, California
J. C. Liddicoat, N.D. Opdyke, G.I. Smith
1980, Nature (286) 22-25
Palaeomagnetic polarity to the base of the Mammoth subchron (3.15 Myr) has been determined in a core of lacustrine sediments from ancient Searles Lake. The magnetostratigraphy provides a chronological framework for palynological, tephrochronological and palaeoecological studies of the core. Five zones of inclination are found that are not in the...
Nearshore current pattern off south Texas: an interpretation from aerial photographs.
R. E. Hunter, G. W. Hill
1980, Remote Sensing of Environment (10) 115-134
Current patterns in a 4-km-wide zone along the south Texas coast were interpreted from patterns of water turbidity visible in aerial photographs taken during a winter day of moderate northerly winds. Features of the turbidity pattern remained recognizable on photographs taken 25 min apart. Currents measured from the movements of...
Impact of horse traffic on trails in Rocky Mountain National Park.
R.M. Summer
1980, Journal of Soil and Water Conservation (35) 85-87
Disturbances related to the impact of horses on trails in Rocky Mountain National Park vary across the landscape. Geomorphic monitoring of permanent sites suggests that horse traffic is not the single, dominant process active on trails, nor is degredation always a direct result of horse use. Instead, amounts and rates...
He(Iα) and He(IIα) photoelectron spectra of fluorinated chloro- and bromo-benzenes
Manijeh Mohraz, John Paul Maier, Edgar Heilbronner
1980, Journal of Electron Spectroscopy and Related Phenomena (19) 429-446
[No abstract available]...
Water resources of the People's Republic of China
N.C. Matalas, C.F. Nordin Jr.
1980, Eos, Transactions, American Geophysical Union (61) 891-901
At the invitation of the Society of Hydraulic Engineers of the People's Republic of China (PRC), a delegation of U.S. hydrologists and hydraulic engineers visited the PRC in the fall of 1978.* From discussions with officials of both the Society and the Ministry of Water Conservancy and Power (MWCP), and...
Elastic moduli of rock glasses under pressure to 8 kilobars and geophysical implications
R. Meister, E.C. Robertson, R.W. Werke, R. Raspet
1980, Journal of Geophysical Research Solid Earth (85) 6461-6470
Shear and longitudinal velocities were measured by the ultrasonic phase comparison method as a function of pressure to 8 kbar on synthetic glasses of basalt, andesite, rhyolite, and quartz composition and on natural obsidian. Velocities of most of the glasses decrease anomalously with pressure, but increasingly more-normal behavior occurs with...
Hydrogen sulfide removal with boric acid
M. M. Schnepfe
1980, Analytical Chemistry (52) 1534-1535
No abstract available....
Use of altered volcanic ash falls in stratigraphic studies of coal-bearing sequences: an example from the Upper Cretaceous Ferron Sandstone Member of the Mancos Shale in central Utah.
Thomas A. Ryer, R.E. Phillips, B.F. Bohor, R. M. Pollastro
1980, Geological Society of America Bulletin (91) 579-586
The Ferron consists of 5 delta cycles, each of which includes one coal zone which contains at least one, and usually several, laterally persistent kaolinitic claystone partings. Laboratory study of the partings demonstrates that they represent altered volcanic ash falls. These partings have proven particularly useful in reconstructing the depositional...
Biogenic and thermogenic origins of natural gas in Cook Inlet basin, Alaska.
George E. Claypool, C. N. Threlkeld, L. B. Magoon
1980, American Association of Petroleum Geologists Bulletin (64) 1131-1139
Two types of natural gas occurrences are present in the Cook Inlet basin. The major reserves (1.8 × 1011m3) occur in shallow (less than 2,300 m), nonassociated dry gas fields that contain methane with ^dgr13C in the range of -63 to -56 per mil. These gas fields are in sandstones...
Some factors controlling the concentration of uranium in the world ocean
S. Bloch
1980, Geochimica et Cosmochimica Acta (44) 373-377
Low-temperature alteration of the oceanic crust is a major sink for the U supplied to the oceans and may account for about 50% of the estimated present-day input of this element. Uranium uptake by organic-rich sediments and coexisting phosphorites on continental margins is also important and may remove in excess...
(π−1) → (π−1), (π−1) emission spectra of chlorofluorobenzene cations in the gaseous phase and their lifetimes in the (0o) states
John Paul Maier, O. Marthaler, Manijeh Mohraz, R.H. Shiley
1980, Chemical Physics (47) 295-305
The radiative decay of seventeen electronically excited chlorofluorobenzene cations in the gaseous phase has been detected. The reported emission spectra, which have been obtained using low energy electron beam excitation, are assigned to the B(??-1 ??? X(??-1 electronic transitions of these cations on the basis of their Ne(I) photoelectron spectra....
