Introduction: seismology and earthquake engineering in Central and South America.
A. F. Espinosa
1983, Earthquake Information Bulletin (USGS) (15) 4-6
Reports the state-of-the-art in seismology and earthquake engineering that is being advanced in Central and South America. Provides basic information on seismological station locations in Latin America and some of the programmes in strong-motion seismology, as well as some of the organizations involved in these activities.-from Author...
Can the earth be dated from decay of its magnetic field?.
G. B. Dalrymple
1983, Journal of Geological Education (31) 124-133
Thomas G. Barnes, Emeritus Professor of Physics at the University of Texas, El Paso, and a creationist, argues that the geomagnetic field was created by unknown processes at the time of creation of the earth and has been decaying irreversibly and exponentially, with a half-life of about 1400 years,...
Status of the West Indian manatee in Honduras
G. B. Rathbun, J. A. Powell, G. Cruz
1983, Biological Conservation (26) 301-308
Aerial surveys and interviews with fisherman in Honduras indicate that manatee numbers are low. There is an abundance of suitable habitat, and evidence on the proportion of calves indicates that manatees are reproducing. Although natural mortality occurs when the animals are trapped in small landlocked coastal lagoons, the greatest threat...
Reinterpretation of the exposed record of the last two cycles of Lake Bonneville, Western United States
W. E. Scott, W.D. McCoy, R. R. Shroba, M. Rubin
1983, Quaternary Research (20) 261-285
A substantially modified history of the last two cycles of Lake Bonneville is proposed. The Bonneville lake cycle began prior to 26,000 yr B.P.; the lake reached the Bonneville shoreline about 16,000 yr B.P. Poor dating control limits our knowledge of the timing of subsequent events. Lake level was maintained...
Orickite and coyoteite, two new sulfide minerals from Coyote Peak, Humboldt County, California.
Richard C. Erd, G.K. Czamanske
1983, American Mineralogist (68) 245-254
Minute quantities of orickite and coyoteite occur with rare alkali iron sulphides in a mafic alkalic diatreme near Orick, Humboldt County. Orickite, NaxKyCu0.95Fe1.06zH2O (x,y < 0.03, z < 0.5), is hexagonal, a 3.695, c 6.16 A, D 4.212 g/cm3, Z = 4. The strongest XRD reflections are 3.08(100), 3.20(90), 2.84(60),...
40Ar/39Ar and U-Th-Pb dating of separated clasts from the Abee E4 chondrite
D.D. Bogard, D.M. Unruh, M. Tatsumoto
1983, Earth and Planetary Science Letters (62) 132-146
Determinations of40Ar/39Ar and U-Th-Pb are reported for three clasts from the Abee (E4) enstatite chondrite, which has been the object of extensive consortium investigations. The clasts give40Ar/39Ar plateau ages and/or maximum ages of 4.5 Gy, whereas two of the clasts give...
An annotated check list of the amphibians and reptiles of California
M.R. Jennings
1983, California Fish and Game (69) 151-171
Correlation of Alaskan varve thickness with climatic parameters, and use in paleoclimatic reconstruction
J.A. Perkins, J.D. Sims
1983, Quaternary Research (20) 308-321
The thickness of varves in the sediments of Skilak Lake, Alaska, are correlated with the mean annual temperature (r = 0.574), inversely correlated with the mean annual cumulative snowfall (r = -0.794), and not correlated with the mean annual precipitation (r = 0.202) of the southern Alaska climatological division for...
A quantitative comparison of Soil Development in four climatic regimes
J.W. Harden, E. M. Taylor
1983, Quaternary Research (20) 342-359
A new quantitative Soil Development Index based on field data has been applied to chronosequences formed under different climatic regimes. The four soil chronosequences, developed primarily on sandy deposits, have some numeric age control and are located in xeric-inland (Merced, Calif.), xeric-coastal (Ventura, Calif.), aridic (Las Cruces, N. Mex.), and...
Clutch and egg size in the New Guinea chelid turtle Emydura subglobosa
J.E. Lovich, S.W. Gotte, C.H. Ernst
1983, Herpetofauna (14) 95
Taeniolite, an uncommon lithium-mica from Coyote Peak, Humboldt County, California.
Richard C. Erd, G.K. Czamanske, C.E. Meyer
1983, Mineralogical Record (14) 39-40
Taeniolite has been found in a late pegmatitic clot in a mafic alkalic diatreme at Coyote Peak; associated species are natrolite, pectolite, aegirine, barytolamprophyllite, rasvumite and sphalerite. The taeniolite is green-brown with sp. gr. (meas.) 2.85(1) and H. 31/2. Optically it is biaxial (-) with alpha 1.541(2), beta = gamma...
Plasma corticosteroid and chloride dynamics in rainbow trout, Atlantic salmon, and lake trout during and after stress
K. B. Davis, N. C. Parker
1983, Aquaculture (32) 189-194
Levels of plasma corticosteroids and chloride were studied in rainbow trout (Salmo gairdneri), lake trout (Salvelinus namaycush), and Atlantic salmon (Salmo salar) after 6 h of confinement in a shallow dipnet. Plasma corticosteroids increased more sharply in rainbow trout than in the other species during the confinement, and returned to...
The reaction of bighorn sheep to human disturbance in the San Gabriel Mountains, California
K.M. Hamilton, S. Holl, C. L. Douglas
1983, Desert Bighorn Council Transactions (27) 50-55
Location of internal hydrogen atoms in the paradodecatungstate polyanion by neutron diffraction
H. T. Evans Jr., E. Prince
1983, Journal of the American Chemical Society (105) 4838-4839
No abstract available....
Distribution of mineral deposits in accreted terranes and cratonal rocks of western United States
J. P. Albers
1983, Canadian Journal of Earth Sciences (20) 1019-1029
The western margin of the conterminous United States, covering roughly 300 000 mi2 (777 000 km2), is an agglomeration of tectonostratigraphic terranes accreted to the North American craton mainly during Mesozoic time. The terranes represent a number of fundamental crustal types: oceanic crust, island-arc crust, mélange, various combinations of the preceding three, batholithic, miogeoclinal, and...
Branched-chain amino acid aminotransferase activity in the tissues of lake trout
S. G. Hughes, G. L. Rumsey, M.C. Nesheim
1983, Comparative Biochemistry and Physiology, Part B: Comparative Biochemistry (76) 429-431
1. The enzyme branched-chain amino acid aminotransferase (BCAT) was found in five tissues of fingerling lake trout, Salvelinus namaycush, (listed in order of decreasing tissue specific activity): posterior kidney, skeletal muscle, gill, liver, and anterior kidney.2. This pattern is consistent with that found in other animals.3. The results of this...
Paleohydrological methods and some examples from Swedish fluvial environments I. Cobble and boulder deposits
G. P. Williams
1983, Geografiska Annaler, Series A (65 A) 227-243
This article establishes approximate empirical relations for determining the minimum unit stream power, bed shear stress and mean flow velocity capable of moving cobbles and boulders on streambeds. The derived equations then are used to estimate the minimum paleoflows that could have transported the boulders of two ancient...
CONTRIBUTION OF LAND USE DATA TO THE INVESTIGATION OF TRENDS IN FLOODING IN THE TUG FORK BASIN OF KENTUCKY, VIRGINIA, AND WEST VIRGINIA.
Sarah E. Bowers, Arthur G. Scott
1983, Conference Paper, Technical Papers of the American Congress of Surveying and Mapping
The U. S. Geological Survey, in cooperation with the U. S. Bureau of Mines and the Office of Surface Mining Reclamation and Enforcement, is investigating effects of mining on flood frequency and magnitude within the basin. Changing land use, particularly the acceleration of surface mining, may cause or contribute to...
A strategy for mineral and energy resource independence
W. D. Carter
1983, Advances in Space Research (3) 223-236
Data acquired by Landsats 1, 2, and 3, are beginning to provide the information on which an improved mineral and energy resource exploration strategy can be based. Landsat 4 is expected to augment this capability with its higher resolution (30 m) and additional spectral bands in the Thematic Mapper (TM)...
Analysis of spurious oscillation modes for the shallow water and Navier-Stokes equations
Roy A. Walters, G. F. Carey
1983, Computers and Fluids (11) 51-68
The origin and nature of spurious oscillation modes that appear in mixed finite element methods are examined. In particular, the shallow water equations are considered and a modal analysis for the one-dimensional problem is developed. From the resulting dispersion relations we find that the spurious modes in elevation are associated...
Isotopic and chemical composition of Parbati Valley geothermal discharges, north-west Himalaya, India
W.F. Giggenbach, R. Gonfiantini, B.L. Jangi, A.H. Truesdell
1983, Geothermics (12) 199-222
The isotopic compositions of the waters discharged from Parbati Valley geothermal areas indicate a higher altitude meteoric origin, with discharge temperatures reflecting variations in the depth of penetration of the waters to levels heated by the existence of a ‘normal’ geothermal gradient. On the basis of mixing models involving silica,...
Tuffaceous sediments as source rocks for uranium: A case study of the White River Formation, Wyoming
R. A. Zielinski
1983, Journal of Geochemical Exploration (18) 285-306
Fine-grained tuffaceous sediments of the White River Formation (Oligocene) are evaluated as a possible source of uranium for the sedimentary uranium deposits of Wyoming. The evaluation is based upon a model in which volcanic glass is considered to be a major host of uranium and thorium and in which uranium...
Dual extraction of R-mode and Q-mode factor solutions
D. Zhou, T. Chang, J.C. Davis
1983, Journal of the International Association for Mathematical Geology (15) 581-606
It is mathematically possible to extract both R-mode and Q-mode factors simultaneously (RQ-mode factor analysis)by invoking the Eckhart-Young theorem. The resulting factors will be expressed in measures determined by the form of the scalings that have been applied to the original data matrix. Unless the measures for both solutions are...
Eruptive history of Mount Mazama and Crater Lake Caldera, Cascade Range, U.S.A.
C. R. Bacon
1983, Journal of Volcanology and Geothermal Research (18) 57-115
New investigations of the geology of Crater Lake National Park necessitate a reinterpretation of the eruptive history of Mount Mazama and of the formation of Crater Lake caldera. Mount Mazama consisted of a glaciated complex of overlapping shields and stratovolcanoes, each of which was probably active for a comparatively short...
An examination of the southern California field test for the systematic accumulation of the optical refraction error in geodetic leveling
R. O. Castle, B.W. Brown Jr., T.D. Gilmore, R. K. Mark, R. C. Wilson
1983, Geophysical Research Letters (10) 1081-1084
Appraisals of the two levelings that formed the southern California field test for the accumulation of the atmospheric refraction error indicate that random error and systematic error unrelated to refraction competed with the systematic refraction error and severely complicate any analysis of the test results. If...
