R.A. Clark, W. L. Halvorson
1990, Technical Report 37
No abstract available at this time...
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Publication Extents
Not all publications have extents, not all extents are completely accurateHelaine W. Markewich, Milan J. Pavich, Gary R. Buell
1990, Geomorphology (3) 417-447
The Piedmont and Coastal Plain physiographic provinces comprise 80 percent of the Atlantic Coastal states from New Jersey to Georgia. The provinces are climatically similar. The soil moisture regime is udic. The soil temperature regime is typically thermic from Virginia through Georgia, although it is mesic at altitudes above 400...
C. Wnuk, J. O. Maberry
1990, Journal of Paleontology (64) 440-450
Enigmatic tubular trace fossils up to eight meters long occur in the Lower Pennsylvanian Middlesboro Member of the Lee Formation. Two morphotypes occur: type 1 trace fossils are plain, smooth, vertical, nonbranching, parallel-walled, tubular structures; type 2 trace fossils branch, have walls with faint vertical striations, regularly...
J.F. Banfield, D.R. Veblen, B.F. Jones
1990, Contributions to Mineralogy and Petrology (106) 110-123
Olivine crystals in basaltic andesites which crop out in the Abert Rim, south-central Oregon have been studied by high-resolution and analytical transmission electron microscopy. The observations reveal three distinct assemblages of alteration products that seem to correspond to three episodes of olivine oxidation. The olivine crystals contain rare, dense arrays...
Lawrence J. Drew, Meng Qingrun, Sun Weijun
1990, LITHOS (26) 43-65
The plate tectonic setting, regional geology and certain aspects of the economic geology of the iron-rare-earth-niobium ore bodies at Bayan Obo, Inner Mongolia, China, were studied by a team of geologists from the Tianjin Geologic Research Academy and the U.S. Geological Survey between 1987 and 1989. These ore bodies were...
S. E. Box, E. J. Moll-Stalcup, J. L. Wooden, J.Y. Bradshaw
1990, Geology (18) 1219-1222
The Kilbuck terrane in southwestern Alaska is a narrow, thin crustal sliver or flake of amphibolite facies orthogneiss. The igneous protolith of this gneiss was a suite of subduction-related platonic rocks. U-Pb data on zircons from trondhjemitic and granitic samples yield upper-intercept (igneous)...
J.J. Norton, J. A. Redden
1990, American Mineralogist (75) 631-655
The pegmatite field and the Harney Peak Granite of the southern Black Hills, South Dakota, form an igneous system that progresses from slightly biotitic muscovite granite through layered pegmatitic granite, with alternating sodic and potassic rocks, to simple plagioclase-quartz-perthite pegmatites, and on to zoned pegmatites. Most of the country rocks...
M.J.K. Flohr, M. Ross
1990, LITHOS (26) 67-98
Syenites from the Magnet Cove alkaline igneous complex form a diverse mineralogical and geochemical suite. Compositional zoning in primary and late-stage minerals indicates complex, multi-stage crystallization and replacement histories. Residual magmatic fluids, rich in F, Cl, CO2 and H2O, reacted with primary minerals to form complex intergrowths of minerals such...
S.C. Komor, D. Elthon
1990, Journal of Petrology (31) 1-50
Rhythmically layered anorthosite and gabbro are exposed in a 4–10-m thick interval at the base of the layered gabbro unit on North Arm Mountain, one of four massifs that compose the Bay of Islands ophiolite, Newfoundland. Within the rhythmically layered interval, up to 37 anorthosite layers 1–2 cm thick...
Thaddeus S. Dyman
1989, Book chapter, Anadarko Basin symposium, 1988 (Circular 90)
Desmoinesian sandstones from the northern Oklahoma platform and the Anadarko, Arkoma, and Ardmore basins record a complex interaction between mid-Pennsylvanian source-area tectonism and cyclic sedimentation patterns associated with numerous transgressions and regressions. Framework-grain summaries for 50 thin sections from sandstones of the Krebs, Cabaniss, and Marmaton Groups and their surface...
C. William Keighin, Romeo M. Flores
1989, Book chapter, Anadarko Basin symposium, 1988 (Circular 90)
Investigations of 6,500 ft of core and -100 thin-sectioned core samples from 30 drill holes from the Oklahoma Panhandle to the southeast part of the Anadarko basin, Oklahoma, have led to the recognition of three depositional facies of the Springer and Morrow Formations of Mississippian and Pennsylvanian age, as recognized...
L. J. Tilley
1989, Hydrobiologia (174) 133-149
Simultaneous hourly net collections in a meadow and canyon reach of a mountain stream determined diel and spatial abundances of drifting Chironomidae larvae. Sixty-one taxa were identified to the lowest practical level, 52 in the meadow and 41 in the canyon. Orthocladiinae was the most abundant subfamily with 32 taxa...
Harry M. Ohlendorf, Roger L. Hothem, Daniel Welsh
1989, The Condor (91) 787-796
During 1983-1985, we studied the reproductive success of several species of aquatic birds (coots, ducks, shorebirds, and grebes) nesting at two sites in Merced County, California: a selenium-contaminated site (Kesterson Reservoir) and a nearby reference site (Volta Wildlife Area). We used a computer program (MICROMORT) developed for the analysis of...
Chandler S. Robbins, Deanna K. Dawson, Barbara A. Dowell
1989, Book, Wildlife Monographs
Conservation of birds requires an understanding of their nesting requirements, including area as well as structural characteristics of the habitat. Previous studies have shown that many neotropical migrant bird species seem to depend on extensive forested areas, but the specific area requirements of individual species have not been clarified sufficiently...
L.S. Schueck, M.R. Fuller, W.S. Seegar
1989, Book chapter, Proceedings of the Northeast Raptor Management Symposium and Workshop
Four species of Falco occur in the northeastern United States. The gyrfalcon is a rare winter visitor. The peregrine falcon federally listed as endangered, is a migrant and through reestablishment is breeding and wintering locally throughout the northeast. The merlin is a migrant and uncommon winter bird....
D.G. Smith, D. H. Ellis
Beth Giron Pendleton, Maurice N.= LeFranc Jr., Mary Beth Moss, editor(s)
1989, Book chapter, Proceedings of the Northeast Raptor Management Symposium and Workshop.
The snowy owl is a rare to uncommon, irregular winter visitor in the northeastern United States, decreasing southward in abundance except during incursion years, when it is more common and widely distributed. Although snowy owls are recorded in northern New England every winter, major incursions occur at approximately three...
A.D. Miall, Christine E. Turner-Peterson
1989, Sedimentary Geology (63) 21-60
Techniques of architectural element analysis and lateral profiling have been applied to the fluvial Westwater Canyon Member of the Morrison Formation (Jurassic) in southern San Juan Basin. On a large scale, the sandstone-body architecture consists mainly of a series of tabular sandstone sheets 5–15 m thick and hundreds of meters...
Arthur L. Geldon
1989, Water-Resources Investigations Report 87-4195
Paleozoic rocks in northwestern Colorado were investigated during the U.S. Geological Survey 's Regional Aquifer Systems Analysis of the Upper Colorado River Basin. Paleozoic rocks in the study area are grouped into 11 hydrostratigraphic units on the basis of lithologic and hydrologic properties. Devonian and Mississippian carbonate rocks and Pennsylvanian...
D. A. Eckhardt, W.J. Flipse Jr., E. T. Oaksford
1989, Water-Resources Investigations Report 86-4142
The chemical quality of groundwater in the upper glacial (water-table) aquifer beneath the 10 types of land-use areas of Nassau and Suffolk Counties, NY was examined to evaluate the effect of human activities on groundwater. The highest median chloride and total dissolved-solids concentrations were found in wells in high-density residential...
Glen F. Brown, Dwight L. Schmidt, A. Curtis Huffman Jr.
1989, Professional Paper 560-A
Western Arabia lies within the low-latitude desert of north Africa and the Middle East, the core being the Arabian segment of the African Shield. The core of complex basement rocks accounts for about 670,000 km2, or one-third of the Arabian Peninsula. Reconnaissance mapping of these crystalline rocks, together with bordering...
Theodore J. Armbrustmacher
1989, Open-File Report 89-146
Paul Stephen Corn, William Stolzenburg, R. Bruce Bury
1989, Report
Acid deposition may be detrimental or stressful to native populations of wildlife. Because many species of amphibians breed in shallow ponds created by spring rains or melting snow, they may be particularly vulnerable to the effects of acidification. From 1986 to 1988, we surveyed 105 locations in the...
J.M. Rhodes, K.P. Wenz, C.A. Neal, J. W. Sparks, J. P. Lockwood
1989, Nature (337) 257-260
From the beginning of the study of Hawaiian volcanism there has been controversy over possible relationships between the neighbouring active volcanoes Mauna Loa and Kilauea1–5. Seismic activity, thought to reflect upward migration of magma, reveals that the magmatic plumbing systems apparently converge at depth to form a broad funnel within...
Thomas N. Todd, Ralph M. Stedman
1989, Canadian Journal of Zoology (67) 1679-1685
Gill raker number and length were compared for lake herring, Coregonus artedii LeSueur, and bloater, Coregonus hoyi (Gill), collected in 1917, 1956, and 1984-1985 at four locations in western Lake Huron to examine the effects of suspected introgressive hybridization on these distinctive species characters. Gill raker length showed no change...
E. Moll-Stalcup, Joseph G. Arth
1989, Journal of Geophysical Research Solid Earth (94) 15989-16020
Late Cretaceous and early Tertiary volcanic and plutonic rocks in western Alaska comprise a vast magmatic province extending from the Alaska Range north to the Arctic Circle, south to Bristol Bay, and west to the Bering Sea Shelf. The chemical and isotopic composition of five of these Late Cretaceous to...