Fall and winter distribution of Canada geese in the Mississippi flyway
Michael D. Samuel, Donald H. Rusch, Kenneth F. Abraham, Murray M. Gillespie, J. Paul Prevett, George W. Swenson
1991, Journal of Wildlife Management (55) 449-456
Canada geese (Branta canadensis) from northern Manitoba and northern Ontario were marked with leg bands and neck bands and observed throughout the Mississippi flyway from 1978 to 1989. We used observations of neck-banded geese within each state to determine the relative fall/winter distribution of the Eastern Prairie Population (EPP) and...
Resource constraints in petroleum production potential
C.D. Masters, D. H. Root, E. D. Attanasi
1991, Science (253) 146-152
Geologic reasons indicate that the dominant position of the Middle East as a source of conventional petroleum will not be changed by new discoveries elsewhere. The share of world crude oil production coming from the Middle East could increase, within 10 to 20 years, to exceed 50 percent, under even...
Seismic reflection/refraction mapping of faulting and regional dips in the eastern Alaska Range
Thomas M. Brocher, Warren J. Nokleberg, N.I. Christensen, William J. Lutter, Eric L. Geist, M. A. Fisher
1991, Journal of Geophysical Research B: Solid Earth (96) 10233-10249
We present the results of a Trans‐Alaska Crustal Transect (TACT) investigation of the upper 2–5 km of the eastern Alaska Range in the vicinity of the Denali fault based on seismic reflection/refraction data, laboratory measurements of rock velocities, and structural mapping. The Denali fault is a major dextral slip structure...
Neotectonic effects on sinuosity and channel migration, Belle Fourche River, Western South Dakota
Basil Gomez, Donna C. Marron
1991, Earth Surface Processes and Landforms (16) 227-235
Short-term instability in the behaviour of a small, meandering alluvial channel is identified from the relation between sinuosity and either floodplain slope or channel slope within 17 reaches along an 81-kilometre section of the Belle Fourche River in western South Dakota. In reaches 1 to 4 and 11 to 17...
Basin and range crustal and upper mantle structure, northwest to central Nevada
Rufus D. Catchings, Walter D. Mooney
1991, Journal of Geophysical Research B: Solid Earth (96) 6247-6267
We present an interpretation of the crustal and uppermost mantle structure of the Basin and Range of northwestern Nevada based on seismic refraction/wide‐angle reflection, near‐vertical reflection, and gravity data. In comparison to most previous estimates, we find that the crust is somewhat thicker (32–36 km versus 22–30...
U–Pb geochronology of Late Cretaceous and early Tertiary plutons in the northern Coast Mountains batholith
G.E. Gehrels, W. C. McClelland, S.D. Sampson, Patchett P. Jonathan, David A. Brew
1991, Canadian Journal of Earth Sciences (28) 899-911
U–Pb geochronologic studies demonstrate that steeply dipping, sheetlike tonalitic plutons along the western margin of the northern Coast Mountains batholith were emplaced between ~83 and ~57 (perhaps ~55) Ma. Less elongate tonalitic–granodioritic bodies in central portions of the batholith yield ages of 59–58 Ma, coeval with younger phases of the tonalitic...
Home range and movements of juvenile Puerto Rican parrots
Gerald D. Lindsey, Wayne J. Arendt, Jan Kalina, Grey W. Pendleton
1991, Journal of Wildlife Management (55) 318-322
We studied home range and movements of 15 radio-marked, juvenile Puerto Rican parrots (Amazona vittata) fledging from wild nests during summer and fall, 1985-87. When juvenile parrots remained in the nest valley, home ranges during 1986 (x̄ = 32 ± 10 [SE] ha, n = 4) were larger (P...
Population trends from the American woodcock singing-ground survey, 1970-88
John R. Sauer, James B. Bortner
1991, Journal of Wildlife Management (55) 300-312
Population trend analysis of American woodcook (Scolopax minor) using data from a singing-ground survey indicates population declines throughout the breeding range of the species between 1970 and 1988. In the eastern United States and Canada, this decline has been quite consistent throughout the period, but in the central portion of...
Possible solar noble-gas component in Hawaiian basalts
M. Honda, I. McDougall, D.B. Patterson, A. Doulgeris, D.A. Clague
1991, Nature (349) 149-151
The noble-gas elemental and isotopic composition in the Earth is significantly different from that of the present atmosphere, and provides an important clue to the origin and history of the Earth and its atmosphere. Possible candidates for the noble-gas composition of the primordial Earth include a solar-like component, a planetary-like...
The neotectonic setting of Puerto Rico
D.G. Masson, Kathryn M. Scanlon
1991, Geological Society of America Bulletin (103) 144-154
The island of Puerto Rico, in the northeast Caribbean, lies within a broad deformation zone between the Caribbean and North American plates. The simplest model for the tectonic setting of Puerto Rico has major strike-slip movement on nearly east-west lines in the vicinity of the Puerto Rico Trench coupled to...
Electromagnetic terrain conductive and ground penetrating radar investigation at and near the Ciba-Geigy Superfund site, Ocean County, New Jersey: quality control assurance plan and results
Gary J. Barton, Tamara Ivahnenko
1991, Book, Proceedings of the Symposium on the Application of Geophysics to Engineering and Environmental Problems
Ground water is the principal source of drinking water in the vicinity of the Ciba-Geigy Superfund site near Toms River, Ocean County, New Jersey. The presence of earlier identified point sources of organic-compound and, to a lesser extent, metals contamination dt the Ciba-Geigy Toms River Chemical Company Plant has resulted-in severe degradation of ground-water quality...
Late Quaternary stratigraphy and depositional history of the Long Island Sound basin
Ralph S. Lewis, Janet Radway Stone
1991, Journal of Coastal Research (11) 1-23
The stratigraphy of Late Quaternary geologic units beneath Long Island Sound (LIS) is interpreted from 3,500 km of high-resolution, seismic-reflection profiles supplemented by vibracore data. Knowledge gained from onshore regional geologic studies and previous offshore investigations is also incorporated in these interpretations. Glacial deposits overlie and nearly fill an Inner Lowland...
High-energy carbonate-sand accumulation, the Quicksands, southwest Florida Keys
Eugene A. Shinn, Barbara H. Lidz, Charles W. Holmes
1991, Journal of Sedimentary Research (61) 861-862
High-resolution seismic-reflection profiles of the Quicksands, located along a broad ridge on the platform shelf west of Key West, Florida, indicate a significant deposit of non-oolitic carbonate sand occurs in a belt 47 km long by 28 km wide. The surface of the...
Mid-continent earthquake zones; lessons from New Madrid, Missouri
B. J. Mitchell
1991, Earthquakes & Volcanoes (USGS) (22) 120-123
Many seismically active regions occur throughout the world as concentrated zones surrounded by the relatively stable crust of shields or platforms. Examples occur in central and eastern North America, northeastern Brazil, Australia, Norway, Svalbard, Greenland, and other places. Some of these zones, such as those at New Madrid, Missouri, and...
Wasatch fault zone, Utah - segmentation and history of Holocene earthquakes
Michael N. Machette, Stephen F. Personius, Alan R. Nelson, David P. Schwartz, William R. Lund
1991, Journal of Structural Geology (13) 151-164
The Wasatch fault zone (WFZ) forms the eastern boundary of the Basin and Range province and is the longest continuous, active normal fault (343 km) in the United States. It underlies an urban corridor of 1.6 million people (80% of Utah's population) representing the largest earthquake risk in the interior...
Mortality in tundra swans Cygnus columbianus
James C. Bartonek, J.R. Serie, K. A. Converse
1991, Wildfowl (42) 356-358
Our paper identifies and examines the significance of hunting and non-hunting mortality affecting the Eastern Population (EP) and Western Population (WP) (see Serie & Bartonek 1991a) of Tundra Swans. Sport hunting (Serie & Bartonek 1991b), native subsistence hunting (Copp 1989, Stewart & Bernier 1989), malicious shooting (McKelvey & MacNeill 1981),...
On plate tectonics and the geologic evolution of southwestern North America
P.L. Ward
1991, Journal of Geophysical Research (96) 12479-12496
Very rapid subduction of the Farallon plate under southwestern North America between 60 and 40 Ma was accompanied by a relatively low volume of magmatism throughout the southwestern United States and northern Mexico. Between 40 and 20 Ma, when subduction slowed significantly and in one...
Late Cretaceous and early Tertiary plutonism and deformation in the Skagit Gneiss Complex, north Cascade Range, Washington and British Columbia
R. A. Haugerud, P. Van Der Heyden, R. W. Tabor, J. S. Stacey, R. E. Zartman
1991, Geological Society of America Bulletin (103) 1297-1307
The Skagit Gneiss Complex forms a more-or-less continuous terrane within the northern, more deeply eroded part of the North Cascade Range. The complex comprises abundant plutons intruded at mid-crustal depths into a variety of metamorphosed supracrustal rocks of both oceanic and volcanic-arc origin. A plethora of syntectonic pegmatite, small plutons,...
Application of uphole data from petroleum seismic surveys to groundwater investigations, Abu Dhabi (United Arab Emirates)
D. Woodward, C.M. Menges
1991, Geoexploration (27) 193-212
Velocity data from uphole surveys were used to map the water table and the contact at the base dune sand/top alluvium as part of a joint National Drilling Company-United States Geological Survey Ground Water Research Project in the Emirate of Abu Dhabi. During 1981–1983, a reconnaissance seismic survey was...
Trondhjemitic, 1.35-1.31 Ga gneisses of the Mount Holly Complex of Vermont: evidence for an Elzevirian event in the Grenville Basement of the United States Appalachians
N. M. Ratcliffe, J. N. Aleinikoff, W.C. Burton, P. Karabinos
1991, Canadian Journal of Earth Sciences (28) 77-93
A newly recognized suite of trondhjemite–tonalite and dacitic gneiss forms a 10 km wide belt of rocks within the Mount Holly Complex in the central part of the Green Mountain massif of Vermont. Field relationships and chemistry indicate that these gneisses are calc-alkaline, volcanic, and hypabyssal plutonic rocks older than the...
Examination of micrinite concentrates from the Cannel City coal bed of eastern Kentucky: Proposed mechanism of formation
D.N. Taulbee, J.C. Hower, S.F. Greb
1991, Organic Geochemistry (17) 557-565
A high volatile B, micrinite-rich bituminous coal from Morgan County, Kentucky, was crushed and screened to −100 mesh, demineralized and subjected to density gradient centrifugation (DGC). In an initial density separation, micrinite concentration was increased from 52 vol% in the demineralized coal to a maximum of 67% in the 1.25–1.26...
Anomalous folds associated with the east-central part of the Garlock Fault, southeast California
G.I. Smith
1991, Geological Society of America Bulletin (103) 615-624
The east-central part of the left-lateral Garlock fault, in southeast California, is associated with three broad folds that trend and plunge northeast. The folds, which lie north, south, and astride the fault, postdate deposition of alluvial gravels that at one time formed a continuous northwest-sloping fan; the gravels rest conformably...
Midwayan (Paleocene) pollen correlations in the eastern United States
N. O. Frederiksen
1991, Micropaleontology (37) 101-123
The Midwayan Stage of the eastern United States is divided into three new pollen zones, the Pseudoplicapollis serana, Tricolpites asper and Caryapollenites prodromus interval zones. Pollen data support the presence of an unconformity between the Rhems and Williamsburg Formations of South Carolina. The base of the Aquia Formation of Virginia...
Wigeongrass (Ruppia maritima): a literature review
Harold A. Kantrud
1991, Fish and Wildlife Research 10
Wigeongrass (Ruppia maritima L.) is a submersed macrophyte of nearly cosmopolitan distribution and worldwide importance as a waterfowl food. Unfortunately, the plant no longer inhabits vast areas disturbed by human activities. Taxonomic status of the plant is uncertain, especially in North America. In mild climates, in habitats subject to environmental...
Terraces on the Florida escarpment: Implications for erosional processes
D.C. Twichell, C. K. Paull, L.M. Parson
1991, Geology (19) 897-900
SeaBeam bathymetric data and GLORIA (Geologic LOng-Range Inclined Asdic) sidescan sonar images of a 175-km-long section of the Florida escarpment in the eastern Guff of Mexico show that this carbonate escarpment has been eroded since its initial formation, but its morphology suggests that erosional processes have not acted uniformly on...
