Late Miocene mollusks from the Queen Charlotte Islands, British Columbia, Canada
Warren O. Addicott
1978, Journal of Research of the U.S. Geological Survey (6) 677-689
A fauna of bivalve mollusks, scattered gastropods, and an echinoid from exposures of the Skonun Formation in the northeastern part of Graham Island is indicative of an early late Miocene age and correlation with the provincial Wishkahan Stage. The molluscan assemblages are from the upper 600 of the 1800-m-thick marine...
Wood River mining district, Idaho - intrusion-related lead-silver deposits derived from country rock source
Wayne E. Hall, Robert O. Rye, Bruce R. Doe
1978, Journal of Research of the U.S. Geological Survey (6) 579-592
Lead-silver deposits in the Wood River mining district occur in shear zones in hornfelsed argillite of the Devonian Milligen Formation near granitic plutons and under the Wood River thrust fault. The principal ore minerals are argentiferous galena and sphalerite; siderite is the principal gangue. The δ34S values of the sulfide...
Strain in southern California: Measured uniaxial north-south regional contraction
J.C. Savage, W.H. Prescott, M. Lisowski, N. King
1978, Science (202) 883-885
The plate tectonics model of the Pacific moving northwest relative to North America implies that the regional strain in California should be simple shear across a vertical plane striking N45°W or equivalently equal parts of north-south contraction and east-west extension. Measurements of the strain accumulation at seven separate sites in...
Model aids planners in predicting rising ground-water levels in San Bernardino, California
William F. Hardt, C. B. Hutchinson
1978, Groundwater (16) 424-431
The city of San Bernardino is in a semiarid inland valley about 60 miles (100 kilometers) east of Los Angeles. The southern part of the city is traversed by the San Jacinto fault. Adjacent to the upgradient (northeast) side of the fault is a 10 square mile (26 square kilometers)...
Trend analysis of vegetation in Louisiana's Atchafalaya river basin
Calvin P. O’Neil, J. Edward deSteiguer, Gary W. North
1978, Pecora IV Proceedings of the Symposium 114-136
The purpose of the study was to determine vegetation succession trends; produce a current vegetation map of the basin; and to develop a mathematical model capable of predicting vegetation changes based on hydrologic factors. A statistical relationship of forests and hydrological variables with forest succession constraints predicted forest acreage...
Statistical inference from capture data on closed animal populations
David L. Otis, Kenneth P. Burnham, Gary C. White, David R. Anderson
1978, Wildlife Monographs 3-135
The estimation of animal abundance is an important problem in both the theoretical and applied biological sciences. Serious work to develop estimation methods began during the 1950s, with a few attempts before that time. The literature on estimation methods has increased tremendously during the past 25 years (Cormack...
The stochastic variation of instream values in rivers
Robert T. Milhous, Ken D. Bovee
1978, Book, Verification of Mathematical and Physical Models in Hydraulic Engineering Proceedings: 26th Annual Hydraulics Division specialty Conference
No abstract available....
Three-dimensional finite-difference model of ground-water system underlying the Muskegon County wastewater disposal system, Michigan
Michael G. McDonald, William B. Fleck
1978, Journal of Research of the U.S. Geological Survey (6) 307-318
The spray irrigation system used by Muskegon County for wastewater treatment is the largest of its kind in the United States. It has 2200 hectares of irrigated farm land, 688 hectares of treatment lagoons, and 105 kilometers of drainage tile. The system has a design capacity of 1.8 cubic meters...
Numerical simulation of dissolved silica in the San Fancisco Bay
David H. Peterson, John F. Festa, T. J. Conomos
1978, Estuarine and Coastal Marine Science (7) 99-116
A two-dimensional (vertical) steady-state numerical model that simulates water circulation and dissolved-silica distributions is applied to northern San Francisco Bay. The model (1) describes the strong influence of river inflow on estuarine circulation and, in turn, on the biologically modulated silica concentration, and (2) shows how rates of silica uptake...
A field evaluation of subsurface and surface runoff. II. Runoff processes
D.H. Pilgrim, D.D. Huff, T.D. Steele
1978, Journal of Hydrology (38) 319-341
Combined use of radioisotope tracer, flow rate, specific conductance and suspended-sediment measurements on a large field plot near Stanford, California, has provided more detailed information on surface and subsurface storm runoff processes than would be possible from any single approach used in isolation. Although the plot was surficially uniform, the...
Preliminary evaluation of the floating dome method of measuring reaeration rates
Doyle W. Stephens
1978, Journal of Research of the U.S. Geological Survey (6) 547-552
The floating dome method of measuring reaeration rates was evaluated using a modified tracer technique and a disturbed equilibrium technique. The lack of agreement between results of the floating dome method and the other methods was attributed to limitations in instrument accuracy amplified by physical relationships of the dome to...
Definition of regional relationships between dissolved solids and specific conductance, Susquehanna River basin, Pennsylvania and New York
David J. Lystrom, Frank A. Rinella, William D. Knox
1978, Journal of Research of the U.S. Geological Survey (6) 541-545
This report presents statistical tests for assessing the accuracy and validity of two regional models of the relationship between dissolved-solids concentration and specific conductance. These models are used to estimate dissolved-solids concentrations based on specific-conductance measurements. The two regional models are compared with station models for 27 stream sites in...
Uranium in waters and aquifer rocks at the Nevada Test Site, Nye County, Nevada
Robert A. Zielinski, John N. Rosholt
1978, Journal of Research of the U.S. Geological Survey (6) 489-498
Previous chemical, geological, and hydrological information describing the physical and chemical environment of the Nevada Test Site (a Federal reserve for the testing of nuclear explosive devices) has been combined with new radiochemical and isotope data for water and rock samples in order to explain the behavior of uranium during...
Estimation of the size of a closed population when capture probabilities vary among animals
K.P. Burnham, W.S. Overton
1978, Biometrika (65) 625-633
A model which allows capture probabilities to vary by individuals is introduced for multiple recapture studies n closed populations. The set of individual capture probabilities is modelled as a random sample from an arbitrary probability distribution over the unit interval. We show that the capture frequencies are a sufficient statistic....
Studies of hydroxyaluminum complexes in aqueous solution
J. L. Bersillon, D. W. Brown, Francois Fiessinger, J. D. Hem
1978, Journal of Research of the U.S. Geological Survey (6) 325-337
The coagulating ability of partly neutralized AlCl3 solutions used in water treatment depends on their basicity, expressed here as the ratio NaOH/AlC3. This work presents an identification of the aluminum species active in the coagulation process. The results give rise to an interpretative model which is consistent with those models...
Infiltration from tributary streams in the Susquehanna River basin, New York
Allan D. Randall
1978, Journal of Research of the U.S. Geological Survey (6) 285-297
As tributary streams in the Susquehanna River basin leave narrow upland valleys and enter larger valleys floored with permeable stratified glacial drift, they lose water by infiltration through streambeds. The infiltration rate is generally slow near the point of entering a larger valley, but farther downstream it is much faster...
Pleistocene history of volcanism and the Owens River near Little Lake, California
Wendell A. Duffield, George I. Smith
1978, Journal of Research of the U.S. Geological Survey (6) 395-408
During pluvial periods of the Pleistocene and Holocene, a large river flowed south from Owens Lake to China Lake between the Sierra Nevada and the Coso Range. The most recent channel, dry during historic time, is clearly marked by cliffs and falls. An older, now-abandoned part of the channel beneath...
Structural control of the Cumberland River and its ancestral channels at Flat Lick, Kentucky
Wayne L. Newell, Dudley D. Rice
1978, Journal of Research of the U.S. Geological Survey (6) 359-367
Remnants of old alluvium on bedrock benches, as much as 76 in (250 ft) above the present course of the Cumberland River near Flat Lick, Ky., are associated with meander scars and broad valleys now occupied by underflt streams. The distribution of old alluvium and associated topographic features define two...
Trenches across the 1906 trace of the San Andreas Fault in northern San Mateo County, California
M. G. Bonilla, J. N. Alt, L. D. Hodgen
1978, Journal of Research of the U.S. Geological Survey (6) 347-358
Two trenches were excavated across the 1906 trace of the San Andreas fault near fences that were displaced by the 1906 faulting. About 18 displacements equal to the 1906 displacement would account for the offset of a stream adjacent to one of the trenches. Review of divergent reports on the...
Factors controlling heavy-mineral variations on the South Texas outer continental shelf, Gulf of Mexico
R. M. Flores, G. L. Shideler
1978, Journal of Sedimentary Petrology (48) 269-280
Heavy-mineral distribution on the outer continental shelf off the southern coast of Texas shows regional variability induced by provenance and local variability reflecting genetic differences in sea-floor sediments. Q-mode factor analysis showed that three suites of heavy minerals are present. The southern ancestral Rio Grande delta sediments contain a distinct...
Heavy-mineral variability in the Baltimore Canyon trough area
H.J. Knebel, David C. Twichell
1978, Journal of Research of the U.S. Geological Survey (6) 215-219
Petrographic analyses of bottom sediments from 87 stations within a relatively large subarea (1700 square kilometers) define the local variability and the distributional processes of heavy minerals in the Baltimore Canyon Trough area (13500km2 ). Of the 29 mineral groups that were identified, those most diagnostic of differences between...
Models for calculating density and vapor pressure of geothermal brines
Robert W. Potter II, John L. Haas Jr.
1978, Journal of Research of the U.S. Geological Survey (6) 247-257
In a model for estimating density of a brine, the density of a natural brine at a known temperature, pressure, and composition can be calculated from the densities of the component salt solutions in the complex brine. A model for estimating vapor pressure requires two direct or indirect estimates of...
Temperature computation for temperate lakes
R. A. Walters, G. F. Carey, D. F. Winter
1978, Applied Mathematical Modelling (2) 41-48
No abstract available....
Remote-sensing and subsurface definition of facies and structure related to uranium deposits, Powder River Basin, Wyoming
G. L. Raines, Terry W. Offield, E.S. Santos
1978, Economic Geology (73) 1706-1723
Computer-enhanced Landsat images of the southern Powder River Basin have been used to define facies and linear structural features within the Wasatch Formation. The facies distribution is detectable primarily because of a relation of vegetation density and type to the local substrate. The surface indications of facies are confirmed by...
Igneous and metamorphic petrology of the southwestern Dana Mountains, Lassiter Coast, Antarctic Peninsula
Walter R. Vennum
1978, Journal of Research of the U.S. Geological Survey (6) 95-106
The southwestern Dana Mountains of the southern Antarctic Peninsula are underlain by the western part of a composite concentrically zoned Upper Cretaceous batholith consisting largely of granodiorite. The granodiorite (felsic phase) was intrusive into older heterogeneous gabbro-diorite (mafic phase) which makes up the margin of the batholith. Flat-lying pegmatite bodies...
