Characterization of fracture permeability with high-resolution vertical flow measurements during borehole pumping.
Frederick L. Paillet, A.E. Hess, C.H. Cheng, E. Hardin
1987, Ground Water (25) 28-40
The distribution of fracture permeability in granitic rocks was investigated by measuring the distribution of vertical flow in boreholes during periods of steady pumping. Pumping tests were conducted at two sites chosen to provide examples of moderately fractured rocks near Mirror Lake, New Hampshire and intensely fractured rocks near Oracle,...
Gravity anomaly at a Pleistocene lake bed in NW Alaska interpreted by analogy with Greenland's Lake Taserssauq and its floating ice tongue
D.F. Barnes
1987, Journal of Geophysical Research Solid Earth (92) 8976-8984
A possible example of a very deep glacial excavation is provided by a distinctive gravity low located at the front of a valley glacier that once flowed into glacial Lake Aniuk (formerly Lake Noatak) in the western Brooks Range. Geologic and geophysical data suggest that sediments or ice filling a...
ECONOMICS AND THE SEARCH FOR OFFSHORE HEAVY MINERAL DEPOSITS.
E. D. Attanasi, J.H. DeYoung Jr.
1987, Marine Mining (6) 323-337
This paper examines the relative importance, in terms of a deposit's commercial status, of physical characteristics of onshore titanium-bearing heavy-mineral placer deposits, and applies these findings to the search for and evaluation of offshore deposits. Results obtained by applying statistical discriminant analysis show that the characteristics most useful for predicting...
Suggested terminology for Quaternary dating methods
Steven M. Colman, K. L. Pierce, P. W. Birkeland
1987, Quaternary Research (28) 314-319
Classification of Quaternary dating methods should be based on the level of quantitative information and the degree of confidence contained in the age estimates produced by the dating methods. We recommend the use of the terms numerical-age, calibrated-age, relative-age, and correlated-age to describe these levels. We also classify dating methods...
The use of variable temperature and magic-angle sample spinning in studies of fulvic acids
W.L. Earl, R.L. Wershaw, K. A. Thorn
1987, Journal of Magnetic Resonance (74) 264-274
Intensity distortions and poor signal to noise in the cross-polarization magic-angle sample spinning NMR of fulvic acids were investigated and attributed to molecular mobility in these ostensibly "solid" materials. We have shown that inefficiencies in cross polarization can be overcome by lowering the sample temperature to about -60??C. These difficulties...
Zircon Lu-Hf systematics and the evolution of the Archean crust in the southern Superior Province, Canada
P. E. Smith, M. Tatsumoto, R.M. Farquhar
1987, Contributions to Mineralogy and Petrology (97) 93-104
A combined Lu-Hf and U-Th-Pb isotopic study was made of 25 zircons and 2 whole rocks from the late Archean crust (2,888-2,668 Ma) in the southern Superior Province, Canada. The relative abundances of U, Th, Lu and Hf in zircons from the low grade Michipicoten and Gamitagama greenstone belts show...
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...
One hundred years of earthquake recording at the University of California
B. A. Bolt
1987, Earthquakes & Volcanoes (USGS) (19) 88-92
Seismology is a relatively new science, so there is special reason to celebrate the first permanent earthquake observatories in America, set up by the University of California 100 years ago. The best seismographs then available arrived from England in 1887 and were installed at Lick Observatory on Mt.Hamilton and at the...
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...
Charles F. Richter: A personal tribute
Clarence R. Allen
1987, Earthquakes & Volcanoes (USGS) (19) 146-149
With the death of Charles Richter in 1985, the seismological community lost a renowned colleague, and many of us lost a close friend and advisor. Charles was born on a farm in Ohio in 1900, received his A.B. from Stanford in 1920, and his Ph.D. from Caltech in 1928. Virtually...
Earthquakes, July-August 1987
W. J. Person
Henry Spall, editor(s)
1987, Earthquakes & Volcanoes (USGS) (19) 150-153
There was one major earthquakes (7.0-7.9) during this reporting period, a magnitude 7.1 on July 6 in the Vanuatu Islands of teh South Pacific Ocean. In the United States, a strong earthquake, a magnitude 6.0, occurred on July 31 near the coast of northern California and caused some damage...
Earthquakes, March-April 1987
W. J. Person
1987, Earthquakes & Volcanoes (USGS) (19) 106-110
There was one major earthquake (7.0-7.9) during this reporting period. This quake was located near the coast of northern Chile and had a magnitude of 7.3. Destructive earthquakes also struck Ecuador, Japan, Indonesia and New Zealand. There were no damaging earthquakes in the United States during this period. ...
Seismicity map of the state of Pennsylvania
C. W. Stover, B.G. Reagor, S. T. Algermissen
1987, Miscellaneous Field Studies Map 1280
This map is one of a series of seismicity maps produced by the U. S. Geological Survey that show earthquake data of individual states or groups of states at the scale of 1:1,000,000. This map shows only those earthquakes with epicenters located within the boundaries of Pennsylvania, even though earthquakes...
An inexpensive device for recording animal behavior
Craig R. Ely
1987, Wildlife Society Bulletin (15) 264-265
Recording animal behavior is tedious and time consuming when behaviors are recorded on tape and transcribed to data sheets. Data loggers circumvent these problems, but can be prohibitively expensive and may require extensive programming (see Hensler et al. [1986]). I describe an inexpensive, efficient alternative for recording behavioral observations....
Life history and ecology requirements of the Moapa dace (Moapa coracea)
G.G. Scoppettone
1987, Report
No abstract available ...
Sanctuaries for lake trout in the Great Lakes
Jon G. Stanley, Randy L. Eshenroder, Wilbur L. Hartman
1987, Conference Paper, Coastal zone '87 : proceedings of the Fifth Symposium on Coastal and Ocean Management
Populations of lake trout, severely depleted in Lake Superior and virtually extirpated from the other Great Lakes because of sea lamprey predation and intense fishing, are now maintained by annual plantings of hatchery-reared fish in Lakes Michigan, Huron, and Ontario and parts of Lake Superior. The extensive coastal areas of...
Use of low-altitude aerial photography to identify submersed aquatic macrophytes
Donald W. Schloesser, Bruce A. Manny, Charles L. Brown, Eugene Jaworski
1987, Conference Paper, Color aerial photography in the plant sciences and related fields : proceedings of the Tenth Biennial Workshop on Color Aerial Photography in the Plant Sciences
The feasibility of using low-altitude aerial photography to identify beds of submersed macrophytes is demonstrated. True color aerial photos and collateral ground survey information for submersed aquatic macrophyte beds at 10 sites in the St.Clair-Detroit River system were obtained in September 1978. Using the photos and collateral ground survey information,...
Sedimentation in Lake Onalaska, Navigation Pool 7, Upper Mississippi River, since impoundment
C. E. Korschgen, G. A. Jackson, L.F. Muessig, D. Southworth
1987, Journal of the American Water Resources Association (23) 221-226
Sediment accumulation was evaluated in Lake Onalaska a 2800-ha backwater impoundment on the Upper Mississippi River. Computer programs were used to process fathometric charts and generate an extensive data set on water depth for the lake. Comparison of 1983 survey data with pre-impoundment (before 1937) data showed that Lake Onalaska...
Phytoplankton productivity in relation to light intensity: A simple equation
D. H. Peterson, M.J. Perry, K.E. Bencala, M.C. Talbot
1987, Estuarine, Coastal and Shelf Science (24) 813-832
A simple exponential equation is used to describe photosynthetic rate as a function of light intensity for a variety of unicellular algae and higher plants where photosynthesis is proportional to (1-e−β1). The parameter β (=Ik−1">=Ik−1) is derived by a simultaneous curve-fitting method, where I is incident...
Kinetic theory of oxygen isotopic exchange between minerals and water
R.E. Criss, R. T. Gregory, H.P. Taylor Jr.
1987, Geochimica et Cosmochimica Acta (51) 1099-1108
Kinetic and mass conservation equations are used to describe oxygen isotopic exchange between minerals and water in "closed" and open hydrothermal systems. In cases where n coexisting mineral phases having different reaction rates are present, the exchange process is described by a system of n + 1 simultaneous differential equations...
Geochemistry of metal-rich brines from central Mississippi Salt Dome basin, U.S.A.
Y.K. Kharaka, A.S. Maest, W.W. Carothers, LeRoy M. Law, P. J. Lamothe, T. L. Fries
1987, Applied Geochemistry (2) 543-561
Oil-field brines are the most favored ore-forming solutions for the sediment-hosted Mississippi Valley-type ore deposits. Detailed inorganic and organic chemical and isotope analyses of water and gas samples from six oil fields in central Mississippi, one of the very few areas...
Chemistry and mineralogy of pyrite-enriched sediments at a passive margin sulfide brine seep: Abyssal Gulf of Mexico
R.F. Commeau, C. K. Paull, J.A. Commeau, L.J. Poppe
1987, Earth and Planetary Science Letters (82) 62-74
Pyrite is rapidly accumulating at the contact between the Cretaceous limestones of the Florida Platform and the hemipelagic sediments of the abyssal Gulf of Mexico. Sediments sampled with the submersible “Alvin” in 3266 m of water are associated with a dense...
Preliminary geologic map of the Butte 1 degree by 2 degrees quadrangle, western Montana
C. A. Wallace, R. G. Schmidt, D. J. Lidke, M. R. Waters, J. E. Elliott, A. B. French, J. W. Whipple, S. E. Zarske, M. J. Blaskowski, B. A. Heise, R. A. Yeoman, J.M. O’Neill, D. A. Lopez, G. D. Robinson, M. R. Klepper
1987, Open-File Report 86-292
No abstract available....
The importance of methane and thiosulfate in the metabolism of the bacterial symbionts of two deep-sea mussels
C.R. Fisher, J.J. Childress, R.S. Oremland, R.R. Bidigare
1987, Marine Biology (96) 59-71
Undescribed hydrocarbon-seep mussels were collected from the Louisiana Slope, Gulf of Mexico, during March 1986, and the ultrastructure of their gills was examined and compared to Bathymodiolus thermophilus, a mussel collected from the deep-sea hydrothermal vents on the Gala??pagos Rift in March 1985. These closely related mytilids both contain abundant...
Analysis of two-color geodimeter measurements of deformation within the Long Valley caldera: June 1983 to October 1985
J. Langbein, M. Linker, D. Tupper
1987, Journal of Geophysical Research Solid Earth (92) 9423-9442
Line length changes from several baselines in a trilateration network within the Long Valley caldera clearly define a decrease in strain rate from June 1983 through October 1985. The data consist of more than 1600 length measurements on 23 baselines using a two-color geodimeter, which has a precision of 0.2...
