Mineralogy and petrology of the Cretaceous- Tertiary boundary clay bed and adjacent clay-rich rocks, Raton Basin, New Mexico and Colorado.
R. M. Pollastro, C. L. Pillmore
1987, Journal of Sedimentary Petrology (57) 456-466
The Cretaceous-Tertiary (K-T) boundary is preserved in a sequence of coal-bearing, fluvial rocks in the lower part of the Raton Formation (Late Cretaceous and Paleocene) at several sites in the east-central part of the Raton Basin. The K-T boundary occurs at the top...
Introduction to the Special Issue on remote sensing
K. Watson
1987, Geophysics (52) 839-840
In 1977, the first Special Issue on remote sensing published by Geophysics contained papers selected from two special sessions at the 45th Annual International SEG Meeting, October 12–16, 1975, in Denver, Colorado. That first Special Issue consisted of eight papers: four are primarily tutorial (image processing, spectral signatures in the...
Evolution and petroleum geology of Amlia and Amukta intra-arc summit basins, Aleutian Ridge
E.L. Geist, J.R. Childs, D.W. Scholl
1987, Marine and Petroleum Geology (4) 334-352
Amlia and Amukta Basins are the largest of many intra-arc basins formed in late Cenozoic time along the crest of the Aleutian Arc. Both basins are grabens filled with 2-5 km of arc-derived sediment. A complex system of normal faults deformed the basinal strata. Although initial deposits of late Micocene...
On the interpretation of the geomagnetic energy spectrum
E.R. Benton, L.R. Alldredge
1987, Physics of the Earth and Planetary Interiors (48) 265-278
Two recent high-degree magnetic energy spectra, based mostly on MAGSAT data, are compared and found to agree very well out to order and degree n = 15, but the spectrum remains somewhat uncertain for higher degrees. The hypothesis that a primary break in the slope of the spectrum, plotted semi-logarithmically,...
Application of microwave digestion to the analysis of peat
C. S.E. Papp, L. B. Fischer
1987, The Analyst (112) 337-338
A microwave digestion technique for the dissolution of peat is described and compared with a dry ashing method and a nitric - perchloric - hydrofluoric acid wet digestion. Peat samples with different organic matter contents were used and Ca, Mg, Fe, AI, Na, K, Mn, Zn, Cu and Li were...
Wind energy development in California, USA
H. Wilshire, D. Prose
1987, Environmental Management (11) 13-20
Windfarms have been developed rapidly in California in the last few years. The impetus has been a legislated goal to generate 10% of California's electricity by windpower by the year 2000, and generous state and federal tax incentives. Windpower is promoted as environmentally benign, which it is in traditional uses....
DISTRIBUTED GROUND-WATER DATA BASE OF THE U. S. G. S.
Richard R. Luckey
1987, Conference Paper
During the past 20 years, the ground-water data base of the U. S. Geological Survey has evolved from paper files in local offices, to a national data base on a central mainframe computer, to a distributed data base on a network of 49 minicomputers throughout the United States. Users in...
The decarbonation and heat capacity of ZnCO3
H.T. Haselton, J. R. Goldsmith
1987, Geochimica et Cosmochimica Acta (51) 261-265
The decarbonation curve for ZnCO3 has been determined in the pressure range 3–20 kbar by using a combination of cold-seal vessels and piston-cylinder apparatus with NaCl assemblies. Heat capacities for both synthetic and natural ZnCO3 samples were measured by differential scanning calorimetry at temperatures ranging from 340 to 497 K. The results...
Precambrian geology of the U.S.A.
J. C. Reed Jr.
1987, Episodes (10) 243-247
Although exposures of Precambrian rocks in the USA are widely scattered, recent studies have provided much information about their subsurface distribution and tectonic history. This article reviews the geological development of the Archean craton, orogenic belts and cratonic cover of Proterozoic age, the Midcontinent rift system, and Precambrian rocks caught...
Heavy-mineral suites confirm the wide extent of the Peach Springs Tuff in California and Arizona, U.S.A.
S. Gusa, J. E. Nielson, K. A. Howard
1987, Journal of Volcanology and Geothermal Research (33) 343-347
[No abstract available]...
Cretaceous age of the upper part of the McCoy Mountains Formation, southeastern California and southwestern Arizona, and its tectonic significance: reconciliation of paleobotanical and paleomagnetic evidence.
P. Stone, V.M. Page, W. Hamilton, K. A. Howard
1987, Geology (15) 561-564
The upper part of the 7-km-thick McCoy Mountains Formation in southeastern California contains fossil angiosperm wood that closely resembles the genus Paraphyllanthoxylon, which is known only from strata of late Early Cretaceous and younger age. This wood, in conjunction with geologic field relations, supports...
Geothermometry of Kilauea Iki lava lake, Hawaii
Rosalind Tuthill Helz, C.R. Thornber
1987, Bulletin of Volcanology (49) 651-668
Data on the variation of temperature with time and in space are essential to a complete understanding of the crystallization history of basaltic magma in Kilauea Iki lava lake. Methods used to determine temperatures in the lake have included direct, downhole thermocouple measurements and Fe-Ti oxide geothermometry. In addition, the...
Fabric and its relation to sedimentologic and physical properties of near-surface sediment, Shelikof Strait and Alsek prodelta, Alaska
M.E. Torresan, W. C. Schwab
1987, Journal of Sedimentary Petrology (57) 408-418
To investigate the possible relation between the fabric (microstructural arrangement of particles) of a fine-grained sedimentary deposit and the depositional and environmental processes of that deposit, the fabric of sediment samples from the sea floor of two different depositional settings, Shelikof Strait and...
The ubiquitous ostracode Darwinula stevensoni (Brady and Robertson, 1870), redescription of the species and lectotype designation.
I. G. Sohn
1987, Micropaleontology (33) 150-163
Darwinula stevensoni (Brady and Robertson 1870) is the type species of Darwinula, the ubiquitous living and fossil nonmarine nominate genus of the Darwinulidae and the Darwinulacea. To date, the additional families Darwinuloididae (fossil), Microdarwinulidae (living and fossil), Panxianidae (fossil), and Suchonellidae (fossil) have been referred to the Darwinulacea. A type...
Response of douglas fir (Pseudotsuga menziesii) to uraniferous groundwater in a small glaciated drainage, Northeastern Washington State
R. A. Zielinski, R.R. Schumann
1987, Journal of Geochemical Exploration (27) 281-298
Douglas fir trees and associated soils were sampled from the slopes of a small (∼4 km2) drainage basin in northeastern Washington to investigate the biogeochemical response to locally uraniferous groundwater. Uranium is preferentially incorporated in needles and twigs compared to larger...
[Book review] The Peccaries, by Lyle K. Sowls
N.J. Scott Jr.
1987, Wildlife Review (205) 546-546
Review of: The Peccaries. By Lyle K. Sowls. University of Arizona Press (September 1984). 240 pages. ISBN-10: 0816508224, ISBN-13: 978-0816508228....
Volatilization, transport and sublimation of metallic and non-metallic elements in high temperature gases at Merapi Volcano, Indonesia
R.B. Symonds, William I. Rose Jr., M.H. Reed, F.E. Lichte, David L. Finnegan
1987, Geochimica et Cosmochimica Acta (51) 2083-2101
Condensates, silica tube sublimates and incrustations were sampled from 500–800°C fumaroles and lava samples were collected at Merapi Volcano, Indonesia in Jan.–Feb., 1984. With respect to the magma, Merapi gases are enriched by factors greater than 105 in Se, Re, Bi and Cd; 104–105 in Au, Br, In, Pb and W; 103–104 in...
UNDERWATER MAPPING USING GLORIA AND MIPS.
Pat S. Chavez Jr., Jeffrey A. Anderson, James W. Schoonmaker Jr.
1987, Conference Paper, Oceans Conference Record (IEEE)
Advances in digital image processing of the (GLORIA) Geological Long-Range Induced Asdic) sidescan-sonar image data have made it technically and economically possible to map large areas of the ocean floor including the Exclusive Economic Zone. Software was written to correct both geometric and radiometric distortions that exist in the original...
The geochemistry of water near a surficial organic-rich uranium deposit, northeastern Washington State, U.S.A.
R. A. Zielinski, J. K. Otton, R. B. Wanty, C. T. Pierson
1987, Chemical Geology (62) 263-289
The chemistry of three stream, three spring and six near-surface waters in the vicinity of a Holocene organic-rich uranium deposit is described, with particular emphasis on the chemistry of U. Results characterize the solution behavior of uranium as U-bearing water interacts with relatively undecomposed, surficial organic matter. Of the measured...
Comparison of Methods for Estimating Low Flow Characteristics of Streams
Gary D. Tasker
1987, Water Resources Bulletin (23) 1077-1083
Four methods for estimating the 7-day, 10-year and 7-day, 20-year low flows for streams are compared by the bootstrap method. The bootstrap method is a Monte Carlo technique in which random samples are drawn from an unspecified sampling distribution defined from observed data. The nonparametric nature of the bootstrap makes...
Sedimentary processes on the northwestern Iberian continental margin viewed by long-range side-scan sonar and seismic data
James V. Gardner, Robert B. Kidd
1987, Journal of Sedimentary Petrology (57) 397-407
The effects of an eastern boundary current in the North Atlantic have been mapped from about 39° north latitude along the Iberian margin to as far north as 43°30 north latitude at the western margin of Galicia Bank. The geostrophic current has produced sediment drifts that are...
A Bohemian-type Silurian (Wenlockian) pelecypod faunule from Arctic Canada
J. Pojeta Jr., B.S. Norford
1987, Journal of Paleontology (61) 508-520
The pelecypod genera Slava and Rhombopteria are reported for the first time from Canada, where they occur in a limestone concretion within the Cape Phillips Formation, Cornwallis Island, Arctic Archipelago. These genera are characteristic of Silurian rocks in Bohemia, Czechoslovakia. Graptolites from the same concretion indicate the Monograptus ludensis Zone...
SAND SOURCES FOR THE TRANSGRESSIVE BARRIER COAST OF LONG ISLAND, NEW YORK: EVIDENCE FOR LANDWARD TRANSPORT OF SHELF SEDIMENTS.
S.J. Williams, E.P. Meisburger
1987, Conference Paper
During investigations of the regional geologic framework of Long Island shelf by means of seismic-reflection profiles and cores, Williams (1976) identified a rather limited area on the shelf off Jones Beach where Upper Cretaceous or early Tertiary age glauconite-rich lithosomes subcrop at the seabed, seaward of the shoreface. A suite...
Copulation and mate guarding in the Northern Fulmar
Scott A. Hatch
1987, The Auk (104) 450-461
I studied the timing and frequency of copulation in mated pairs and the occurrence of extra-pair copulation (EPC) among Northern Fulmars (Fulmarus glacialis) for 2 yr. Copulation peaked 24 days before laying, a few days before females departed on a prelaying exodus of about 3 weeks. I estimated that females...
Failure of a massive earthquake-induced landslide dam in Papua New Guinea
J. P. King, I. C. Loveday, R. L. Schuster
1987, Earthquakes & Volcanoes (USGS) (19) 40-47
In many areas of the world, landslides dams are both interesting natural phenomena and significant hazards. A few of the these natural blockages attain heights that rival or exceed those of the largest manmade dams. A landslide dam in its natural state differs from a constructed embankment dam in that...
