Composition of fluid inclusions in Permian salt beds, Palo Duro Basin, Texas, U.S.A.
E. Roedder, W. M. d’Angelo, A. F. Dorrzapf Jr., P. J. Aruscavage
1987, Chemical Geology (61) 79-90
Several methods have been developed and used to extract and chemically analyze the two major types of fluid inclusions in bedded salt from the Palo Duro Basin, Texas. Data on the ratio K: Ca: Mg were obtained on a few of the clouds of tiny inclusions in "chevron" salt, representing...
Earthquakes and groundwater
J.D. Bredehoeft, F. S. Riley, E.A. Roeloffs
1987, Earthquakes & Volcanoes (USGS) (19) 138-146
As part of the U.S Geological Survey prediction experiment at Parkfield along the San Andreas fault in California, a network of water wells is being monitored. this network consists of wells that are situated at seven sites that were drilled by Geological Survey for the express prupose of monitoring water...
Ice-edge eddies in the Fram Strait marginal ice zone
O.M. Johannessen, J.A. Johannessen, E. Svendsen, R.A. Shuchman, W. J. Campbell, E. Josberger
1987, Science (236) 427-429
Five prominent ice-edge eddies in Fram Strait on the scale of 30 to 40 kilometers were observed over deep water within 77°N to 79°N and 5°W to 3°E. The use of remote sensing, a satellite-tracked buoy, and in situ oceanographic measurements showed the presence of eddies with orbital speeds of...
Regional unconformities cored on the New Jersey continental slope
C. Wylie Poag, Doris Low
Charles A. Ross, Drew Haman, editor(s)
1987, Book chapter
No abstract available....
Residence of silver in mineral deposits of the Thunder Mountain caldera complex, Central Idaho, U.S.A.
B. F. Leonard, R.P. Christian
1987, Mineralogy and Petrology (36) 151-168
Silver is an accessory element in gold, antimony, and tungsten deposits of the caldera complex. Most of the deposits are economically of low grade and genetically of xenothermal or epithermal character. Their gold- and silver-bearing minerals are usually disseminated, fine grained, and difficult to study. Sparsely disseminated pyrite and arsenoprite...
New evidence on the state of stress of the San Andreas fault system
Mark D. Zoback, M.L. Zoback, S. Van Mount, J. Suppe, J. P. Eaton, J. H. Healy, D. Oppenheimer, P. Reasenberg, L. Jones, C.B. Raleigh, I.G. Wong, O. Scotti, C. Wentworth
1987, Science (238) 1105-1111
Contemporary in situ tectonic stress indicators along the San Andreas fault system in central California show northeast-directed horizontal compression that is nearly perpendicular...
Evolution of fluvial styles in the Eocene Wasatch Formation, Powder River Basin, Wyoming
Peter D. Warwick, Romeo M. Flores
Frank G. Ethridge, Romeo M. Flores, editor(s)
1987, Book chapter, Recent developments in fluvial sedimentology
Vertical and lateral facies changes in the lower part of the Eocene Wasatch Formation in the Powder River Basin, Wyoming represent an evolution of fluvial systems that varied from meandering to anastomosing. The meandering facies in the lower part of the study interval formed in a series of broad meanderbelts...
US GEOLOGICAL SURVEY'S NATIONAL SYSTEM FOR PROCESSING AND DISTRIBUTION OF NEAR REAL-TIME HYDROLOGICAL DATA.
William G. Shope Jr.
Rodda J.C.Matalas N.C., editor(s)
1987, Conference Paper, IAHS Publication (International Association of Hydrological Sciences)
The US Geological Survey is utilizing a national network of more than 1000 satellite data-collection stations, four satellite-relay direct-readout ground stations, and more than 50 computers linked together in a private telecommunications network to acquire, process, and distribute hydrological data in near real-time. The four Survey offices operating a satellite...
Using a spatial and tabular database to generate statistics from terrain and spectral data for soil surveys
E.A. Horvath, E. A. Fosnight, A. A. Klingebiel, D. G. Moore, J.E. Stone
W.U. Reybold, G.W. Petersen, editor(s)
1987, Book chapter, Soil survey techniques, SSSA Special Publication 20
A methodology has been developed to create a spatial database by referencing digital elevation, Landsat multispectral scanner data, and digitized soil premap delineations of a number of adjacent 7.5-min quadrangle areas to a 30-m Universal Transverse Mercator projection. Slope and aspect transformations are calculated from elevation data and grouped according...
Seafloor gas seeps triggered by a northern California earthquake
M.E. Field, A. E. Jennings
1987, Marine Geology (77) 39-51
A series of marine surveys using high-resolution seismic-reflection and side-scan sonar profiling was conducted on the Klamath River delta from 1977 to 1985. In November 1980, near the middle of this 8-year time period, a major earthquake (magnitude 7) occurred in...
Bolboforma (Chrysophyta?) from the western North Atlantic
C. Wylie Poag, A. L. Karowe
Katie L. Turner, editor(s)
1987, Book chapter, Initial reports of the Deep Sea Drilling Project covering Leg 95 of the cruises of the drilling vessel Glomar Challenger, St. John's, Newfoundland, to Ft. Lauderdale, Florida, August-September 1983
No abstract available....
Variable delay miniservo-control unit
M.A. Uhrich
1987, WRD Instrument News
No abstract available. ...
Accounts describing the Mississippi Valley Earthquakes of 1811-12
1987, Earthquakes & Volcanoes (USGS) (19) 212-217
At 2:15 a.m. on December 16, 1811, a unique sequence of earthquakes began in what is today southeast Missouri and northeast Arkansas. Although the area was sparsely populated,the earthquakes, generally referred to as the New Madrid earthquakes, were felt throughout a wide area if the Central and Eastern United States....
Compilation of hydrologic data for the Edwards aquifer, San Antonio area, Texas, 1985, with 1934-85 summary
G. B. Ozuna, G.M. Nalley, M. N. Bowman
1987, Edwards Underground Water District Bulletin 45
No abstract available....
Mechanics of gravitational spreading of steep-sided ridges («sackung»)
W. Z. Savage, D. J. Varnes
1987, Bulletin of the International Association of Engineering Geology (35) 31-36
Large-scale gravitational spreading of steep-sided ridges characterized by linear fissures, trenches, and uphill-facing scarps high on the sides and tops of ridges are known worldwide. Such spreading, termed sackung, is commonly attributed to pervasive plastic deformation of a rock mass, and is here analyzed as such. Beginning with a previously...
Notes on sedimentation activities calendar year 1986
U.S. Interagency Advisory Committee on Water Data- Subcommittee on Sedimentation
1987, Report
This report is a digest of information furnished by Federal agencies conducting sedimentation investigations. The decision to publish the report was made in 1946, from a proposal by the Chairman of the Federal Interagency River Basin Committee, Subcommittee on Ground Water. The subcommittee approved the proposal and agreed to issue...
Alaska interim land cover mapping program
Water Resources Division, U.S. Geological Survey
1987, Data Users Guide 7
In order to meet the requirements of the Alaska National Interest Lands Conservation Act (ANILCA) for comprehensive resource and management plans from all major land management agencies in Alaska, the USGS has begun a program to classify land cover for the entire State using Landsat digital data. Vegetation and land...
Aquatic ecoregions of the conterminous United States
J.M. Omernick
1987, Report
Ecoregions are based on perceived patterns of a combination of causal and integrative factors including land use, land surface form, potential natural vegetation, and soils (Omernik, 1987). This is a copy of the ecoregion coverage of Omernik (1987) with some item names modified. This is NOT the most recent...
Publications of the U.S. Geological Survey, 1986
Water Resources Division, U.S. Geological Survey
1987, Report
This catalog is a list of (1) books and mapsl that were published during 1986, and (2) articles by Geological Survey personnel in non-Geological Survey journals and books that came to our attention in 1986; it supplements the permanent catalogs "Publications of-.the Geological Survey, 1879-1961", "Publications of the Geological Survey,...
Calculation of solar radiation in mountainous terrain
Alan L. Flint, S.W. Childs
1987, Agricultural and Forest Meteorology (40) 233-249
A study was performed to assess the accuracy of a daily solar radiation model for horizontal or sloping sites in terrain where surrounding ridges and tall trees block both direct beam and diffuse sky short wave radiation. To simulate adequately the major effects of these environments on radiation, the model...
The use of remote sensing data in geographic information systems for hydrologic studies in developing countries
D. G. Moore
Carlos Chagas, Vittorio Canuto, editor(s)
1987, Conference Paper, Study week on: Remote sensing and its impact on developing countries
No abstract available....
Earthquakes, September-October 1986
W. J. Person
1987, Earthquakes & Volcanoes (USGS) (19) 74-76
There was one great earthquake (8.0 and above) during this reporting period in the South Pacific in the Kermadec Islands. There were no major earthquakes (7.0-7.9) but earthquake-related deaths were reported in Greece and in El Salvador. There were no destrcutive earthquakes in the United States....
Resource assessments, geologic deposit models, and offshore minerals with an example of heavy-mineral sands
Emil D. Attanasi, J. H. DeYoung, E. R. Force, Andrew Grosz
P. G. Teleki, M.R. Dobson, Jeffrey R. Moore, von Stackelberg U., editor(s)
1987, Book chapter, Marine minerals
A resource assessment method for offshore minerals based on descriptive and grade-tonnage models is proposed. Historical development and applications of this method are summarized. Based on this approach, descriptive and quantitative deposit models for strand-line titanium placer deposits have been developed. Descriptive statistics were also computed using the worldwide deposit...
Lower Eocene calcareous nannofossil biostratigraphy beneath the Atlantic slope and upper rise off New Jersey: new zonation based on Deep Sea Drilling Project sites 612 and 613
Page C. Valentine
Katie L. Turner, editor(s)
1987, Book chapter, Initial reports of the Deep Sea Drilling Project covering Leg 95 of the cruises of the drilling vessel Glomar Challenger, St. John's, Newfoundland, to Ft. Lauderdale, Florida, August-September 1983
No abstract available....
Hydrogeologic conditions and saline-water intrusion, Cape Coral, Florida, 1978-81
D. J. Fitzpatrick
1986, Water-Resources Investigations Report 85-4231
The upper limestone unit of the intermediate aquifer system, locally called the upper Hawthorn aquifer, is the principal source of freshwater for Cape Coral, Florida. The aquifer has been contaminated with saline water by downward intrusion from the surficial aquifer system and by upward intrusion from the Floridan aquifer system....
