Significance of age relations above and below upper jurassic ophiolite in the Geysers-Clear Lake region, California
R. J. McLaughlin, E.A. Pessagno Jr.
1978, Journal of Research of the U.S. Geological Survey (6) 715-726
In The Geysers-Clear Lake area of northern California, a fragmented Upper Jurassic ophiolite overlain depositionally by the Great Valley sequence is juxtaposed over deformed and metomorphosed rocks of the Franciscan assemblage along the Coast Range thrust. The basal strata of the Great Valley sequence consist of thick breccias of mafic...
Application of four input-output models for nutrients in Lake Okeechobee, Florida
Ronald L. Miller
1978, Journal of Research of the U.S. Geological Survey (6) 821-828
R. A. Vollenweider's (1975) nonconservative model described concentrations of nitrogen and phosphorus for 1969-70 in Lake Okeechobee, Fla., better than the models of F. Biffi in 1963, R. H. Rainey in 1967, and R. Piontelli and V. Tonolli in 1964. Vollenweider's model predicted concentrations of 1.4 milligrams per liter of...
A reexamination of the Pennsylvanian trace fossil Olivellites
Ellis L. Yochelson, David E. Schindel
1978, Journal of Research of the U.S. Geological Survey (6) 789-796
The original interpretation of Olivellites plummeri Fenton and Fenton as the trace of an infaunal gastropod, is reconsidered and rejected. The original slab bearing several examples of O. plummeri has been reexamined and reillustrated. The slab came from the type-locality of O. plummeri in Eastland County, Tex., and is a shallow...
Upper Devonian radiolarians separated from chert of the Ford Lake Shale, Alaska
Brian K. Holdsworth, D. L. Jones, C. Allison
1978, Journal of Research of the U.S. Geological Survey (6) 775-788
Leaching of black bedded chert from the Ford Lake Shale, Kandik Basin, Alaska, with dilute hydrofluoric acid resulted in the complete separation of moderately well preserved radiolarians. Preliminary study of an assemblage obtained from the lower half of the formation revealed six to eight forms apparently identical to specimens previously...
Conductive heat flows in research drill holes in thermal areas of Yellowstone National Park, Wyoming
Donald E. White
1978, Journal of Research of the U.S. Geological Survey (6) 765-774
In convection systems with boiling springs, geysers, fumaroles, and other thermal features, the modes of heat flow become increasingly complex as a single liquid phase at depth rises into the near-surface environment where heat flows by convection of liquid and vapor and by conduction in high thermal gradients. This paper...
Solubility of highly soluble salts in aqueous media - Part 1, NaCl, KCl, CaCl2, Na2SO4, and K2SO4 solubilities to 100°C
Robert W. Potter II, Michael A. Clynne
1978, Journal of Research of the U.S. Geological Survey (6) 701-705
A modified visual method for determining the solubility of highly soluble salts in aqueous media up to 100° C is presented. The solubilities of NaCl, KCl, CaCl2, Na2SO4, and K2SO4 were determined up to 100° C. The tabulated experimental data and the fitted equations describing the data indicate that the...
The geochemical nature of the Archean Ancient Gneiss Complex and Granodiorite Suite, Swaziland: A preliminary study
D.R. Hunter, F. Barker, Hugh T. Millard Jr.
1978, Precambrian Research (7) 105-127
The Ancient Gneiss Complex (AGC) of Swaziland, an Archean gray gneiss complex, lies southeast and south of the Barberton greenstone belt and includes the most structurally complex and highly metamorphosed portions of the eastern Kaapvaal craton. The AGC is not precisely dated but apparently is older than 3.4 Ga. The...
A sediment-dispersal model for the South Texas continental shelf, northwest Gulf of Mexico
G. L. Shideler
1978, Marine Geology (26) 289-313
Textural-distribution patterns of sea-floor sediments on the South Texas continental shelf between Matagorda Bay and the U.S.-Mexico international boundary were evaluated as part of a regional environmental-studies program. Sediment textural gradients support a conceptual model for the regional sediment-dispersal system, which is characterized by both net offshore transport and net...
Distribution and character of upper Mesozoic subduction complexes along the west coast of North America
D. L. Jones, M.C. Blake Jr., E. H. Bailey, R. J. McLaughlin
1978, Tectonophysics (47) 207-222
Structurally complex sequences of sedimentary, volcanic, and intrusive igneous rocks characterize a nearly continuous narrow band along the Pacific coast of North America from Baja California, Mexico to southern Alaska. They occur in two modes: (1) as complexly folded but coherent sequences of graywacke and argillite that locally exhibit blueschist-grade...
Arctic continental shelf morphology related to sea-ice zonation, Beaufort Sea, Alaska
E. Reimnitz, L. Toimil, P. Barnes
1978, Marine Geology (28) 179-210
Landsat-1 and NOAA satellite imagery for the winter 1972–1973, and a variety of ice and sea-floor data were used to study sea-ice zonation and dynamics and their relation to bottom morphology and geology on the Beaufort Sea continental shelf of arctic Alaska.In early winter the location of the boundary between...
Water resources of the Kodiak-Shelikof subregion, south-central Alaska
Stanley H. Jones, R. J. Madison, Chester Zenone
1978, Hydrologic Atlas 612
Hydrologic data for the Kodiak-Shelikof subregion of south-central Alaska are summarized to provide a basis for planning water resources development, identifying water problems and evaluating existing water quality and availability. Average annual precipitation, measured at a few coastal locations in this maritime climatic zone, ranges from 23 to 127 inches....
A conceptual ecological model for Chesapeake Bay
Katherine A. Green
1978, FWS/OBS 78/69
Map showing anomalous bismuth distribution in stream sediment concentrates, Hillsboro and San Lorenzo quadrangles, exclusive of the Black Range Primitive Area, Sierra and Grant counties, New Mexico
K. C. Watts, H. V. Alminas, J. M. Nishi, W.C. Crim
1978, Miscellaneous Field Studies Map 900-K
This map shows the distribution of anomalous bismuth in the nonmagnetic (NM-1) sample fraction plotted on a base which includes sample localities, topography, and generalized geology modified from Hedlund (1975a, b). It is part of a series of maps for several metals that accompany this folio. Distributions of bismuth values...
Map showing anomalous lead distribution in stream sediment concentrates, Hillsboro and San Lorenzo quadrangles, exclusive of the Black Range Primitive Area, Sierra and Grant counties, New Mexico
K. C. Watts, H. V. Alminas, J. M. Nishi, W.C. Crim
1978, Miscellaneous Field Studies Map 900-J
This map shows the distribution of anomalous lead in the two sample fractions, magnetic (M-1) and nonmagnetic (NM-1) plotted on a base which includes sample localities, topography, and generalized geology modified from Hedlund (1975a, b). It is part of a series of maps for several metals that accompany this folio....
Channel migration of the White River in the eastern Uinta Basin, Utah and Colorado
Antonio Jurado, Fred K. Fields
1978, IMAP 1087
The White River is the largest stream in the southeastern part of the Uinta Basin in Utah and Colorado. This map shows the changes that have occurred in the location of the main channel of the river from 1936 to 1974. The map indicated that certain reaches of the river...
Backwater at bridges and densely wooded flood plains, Bogue Chitto near Summit, Mississippi
B.E. Colson, C. O. Ming, George J. Arcement
1978, Hydrologic Atlas 592
New techniques for predicting water-surface profiles, needed in the design of economical, structurally sound, and environmentally compatible stream crossings, are under investigation. The investigation has accelerated with the advent of digital computers capable of analyzing large quatities of data. Among the techniques is the development of two-dimensional (2-D) digital models....
Map showing anomalous tungsten and gold distribution in stream sediment concentrates, Hillsboro and San Lorenzo quadrangles exclusive of the Black Range Primitive Area, Sierra and Grant Counties, New Mexico
K. C. Watts, H. V. Alminas, J. M. Nishi, W.C. Crim
1978, Miscellaneous Field Studies Map 900-I
This map shows the distribution of anomalous tungsten in the two sample fractions, magnetic (M-1) and nonmagnetic (NM-1) gold in the nonmagnetic (NM-1) fraction; these are plotted on a base which includes sample localities, topography, and generalized geology modified from Hedlund (1975a, b). It is part of a series of...
Backwater at bridges and densely wooded flood plains, Tallahala Creek at Waldrup, Mississippi
B.E. Colson, C. O. Ming, George J. Arcement
1978, Hydrologic Atlas 590
New techniques for predicting water-surface profiles, needed in the design of economical, structurally sound, and environmentally compatible stream crossings, are under investigation. The investigation has accelerated with the advent of digital computers capable of analyzing large quantities of data. Among the techniques is the development of two-dimensional (2-D) digital models. ...
A statistical summary and listing of the spectrographic analyses of heavy mineral concentrate and conventional, sieved stream-sediment samples, Silver City area, New Mexico
K. C. Watts, J.R. Hassemer, D. F. Siems, J. M. Nishi
1978, Open-File Report 78-801
Geochemical sampling of a tier of eight 7 1/2-minute quadrangles bordered by latitudes 32° 45'and 33° 00' N. and longitudes 108° 00' and 108° 30' W. was begun in the fall of 1974 and continued seasonally until completion in the fall of 1976. These quadrangles are in southwest New Mexico...
Recent and projected changes in Dead Sea level and effects on mineral production from the sea
Stanley P. Sauer
1978, Open-File Report 78-176
Hydrologic data for the Dead Sea area were reviewed to assess the probable magnitude and rate of change of the water level of the Dead Sea. Historical average annual Dead Sea levels range from a minimum of 399.4 meters below sea level in about 1818 to a maximum of 388.6...
Terrain-analysis procedures for modeling radar backscatter
Gerald G. Schaber, Richard J. Pike, Graydon Lennis Berlin
1978, Open-File Report 79-1088
The collection and analysis of detailed information on the surface of natural terrain are important aspects of radar-backscattering modeling. Radar is especially sensitive to surface-relief changes in the millimeter- to-decimeter scale four conventional K-band (~1-cm wavelength) to L-band (~25-cm wavelength) radar systems. Surface roughness statistics that characterize these changes in...
Hydrologic data for North Creek, Trinity River basin, Texas, 1976
C.C. Kidwell
1978, Open-File Report 77-732
The U.S. Soil Conservation Service is actively engaged in the installation of flood- and soil-erosion reducing structures in Texas under the authority of "The Flood Control Act of 1936 and 1944" and Watershed Protection and Flood Prevention Act" (Public Law 566), as amended. The Soil Conservation Service has found that...
Hydraulic geometry of river cross sections; theory of minimum variance
Garnett P. Williams
1978, Professional Paper 1029
This study deals with the rates at which mean velocity, mean depth, and water-surface width increase with water discharge at a cross section on an alluvial stream. Such relations often follow power laws, the exponents in which are called hydraulic exponents. The Langbein (1964) minimum-variance theory is examined in regard...
Effects of coal mine subsidence in the western Powder River basin, Wyoming
C. Richard Dunrud, Frank W. Osterwald
1978, Open-File Report 78-473
Analyses of the surface effects of past underground coal mining in the western Powder River Basin suggest that underground mining of strippable coal deposits will damage the environment more over long periods of time than will modern surface mining, provided proper restoration procedures are followed after surface mining. Subsidence depressions...
Exploration geophysics calculator programs for use on Hewlett-Packard models 67 and 97 programmable calculators
David L. Campbell, Raymond D. Watts
1978, Open-File Report 78-815
Program listing, instructions, and example problems are given for 12 programs for the interpretation of geophysical data, for use on Hewlett-Packard models 67 and 97 programmable hand-held calculators. These are (1) gravity anomaly over 2D prism with = 9 vertices--Talwani method; (2) magnetic anomaly (?T, ?V, or ?H) over 2D...
