Submarine processes of the middle Atlantic continental rise based on GLORIA imagery
J. S. Schlee, James M. Robb
1991, Geological Society of America Bulletin (103) 1090-1103
Approximately 6100 km of 3.5-kHz echo-sounding profiles was correlated with a GLORIA side-scan sonar image of the mid-Atlantic United States (34??N, 70??W) lower slope-upper continental rise. The image allows us to map the major erosional and depositional features and to identify major processes that have shaped the area. Interpretation of...
A northern Cordilleran ocean-continent transect: Sitka Sound, Alaska, to Atlin Lake, British Columbia
D. A. Brew, Susan M. Karl, D.F. Barnes, R.C. Jachens, A. B. Ford, R. Horner
1991, Canadian Journal of Earth Sciences (28) 840-853
The 155 km wide, 310 km long Sitka Sound – Atlin Lake continent–ocean transect includes almost all the geologic, geophysical, and geotectonic elements of the Canadian Cordillera. It crosses the Chugach, Wrangellia, Alexander, Stikine, and Cache Creek terranes, the Gravina and Laberge overlap assemblages, intrusive and metamorphic belts, and neotectonic faults that...
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...
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...
Off-fault ground ruptures in the Santa Cruz Mountains, California: Ridge-top spreading versus tectonic extension during the 1989 Loma Prieta earthquake
Daniel J. Ponti, Ray E. Wells
1991, Bulletin of the Seismological Society of America (81) 1480-1510
The Ms 7.1 Loma Prieta earthquake of 18 October 1989 produced abundant ground ruptures in an 8 by 4 km area along Summit Road and Skyland Ridge in the Santa Cruz Mountains. Predominantly extensional fissures formed a left-stepping, crudely en echelon pattern along ridges of the hanging-wall block southwest of the San...
The Wasatch fault zone, utah-segmentation and history of Holocene earthquakes
M. N. Machette, S. F. Personius, A.R. Nelson, David P. Schwartz, W.R. Lund
1991, Journal of Structural Geology (13) 137-149
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...
Water-resources potential of the freshwater lens at Key West, Florida
D.J. McKenzie
1990, Water-Resources Investigations Report 90-4115
The island of Key West lies at the end of the Florida Keys, about 150 miles southwest of Miami. The public-water supply for the island is provided by the Florida Keys Aqueduct Authority Well Field near Miami. However, there are many privately owned wells on the island that tap the...
Economic implications of petroleum field size distributions
Emil D. Attanasi, Lawrence J. Drew
1990, Energy Exploration & Exploitation (8) 245-257
The unprecedented natural gas price increases in the late 1970's and early 1980's allowed a glimpse of part of the in-situ distribution of natural gas fields that had been hidden by economic truncation. Analysis of those discoveries shows the distribution to be characterized by progressively larger numbers of fields as...
Base of moderately saline ground water in San Juan County, Utah
Lewis Howells
1990, Technical Publication 94
The base of moderately saline ground water (water that contains from 3,000 to 10,000 milligrams per liter of dissolved solids) was delineated for San Juan County, Utah, based on water-quality data and on formation-water resistivities determined from geophysical well logs using the resistivity-porosity, spontaneous-potential, and resistivity-ratio methods. These data and...
Ground-water resources and simulated effects of withdrawals in the East Shore area of Great Salt Lake, Utah
David W. Clark, Cynthia L. Appel, Patrick M. Lambert, Robert L. Puryear
1990, Technical Publication 93
The ground-water resources in the East Shore area of Great Salt Lake, Utah, were studied to better define the ground-water system; to document changes in ground-water levels, quality, and storage; and to simulate effects of an increase in ground-water withdrawals. The East Shore aquifer system is in basin-fill deposits, and...
Surveying woodland raptors by broadcast of conspecific vocalizations
J. A. Mosher, M.R. Fuller, M. Kopeny
1990, Journal of Field Ornithology (61) 453-461
We surveyed for raptors in forests on study areas in five of the eastern United States. For Cooper's Hawks (Accipiter cooperi), Red-shouldered Hawks (Buteo lineatus), and Barred Owls (Strix varia) the contact rates obtained by broadcasting taped vocalizations of conspecifics along roads were significantly greater than contact rates obtained by...
[Book review] Ospreys: A natural and unnatural history
Charles J. Henny
1990, The Auk (107) 808-809
The Osprey (Pandion haliaetus) is now arguably the world's best known bird of prey. The DDT-related Osprey population crash in the northeastern United States resulted in an unparalleled amount of research during the last 20 years. In 1969, when I published my first paper on Ospreys in The Auk, there...
Owls
D.G. Smith, D. H. Ellis, B.A. Millsap
Beth Giron Pendleton, editor(s)
1990, Book chapter, Proceedings of the Southeast Raptor Management Symposium and Workshop.
Eight species of owls regularly occur and may breed in one or more of the southeastern states. Several additional northern or western species appear irregularly as accidentals or during years of southward incursions. In the Southeast, the most common and wide- spread owls are the common barn-owl, eastern screech-owl, great...
The Loma Prieta earthquake of October 17, 1989 : a brief geologic view of what caused the Loma Prieta earthquake and implications for future California earthquakes: What happened ... what is expected ... what can be done.
Peter L. Ward, Robert A. Page
1990, Report
The San Andreas fault, in California, is the primary boundary between the North American plate and the Pacific plate. Land west of the fault has been moving northwestward relative to land on the east at an average rate of 2 inches per year for millions of years. This motion is...
Role of heat and detachment in continental extension as viewed from the eastern basin and range province in Arizona
Ivo Lucchitta
1990, Tectonophysics (174) 77-114
The Bill Williams River area of west-central Arizona includes not only the Rawhide-Buckskin metamorphic core complex, which is part of the lower Colorado River highly extended terrane (HET), but also the boundary between the extended terranes of the Basin and Range Province and the less deformed Arizona Transition Zone/Colorado Plateau....
Map showing distribution of barium in stream-sediment samples, Richfield 1° x 2° quadrangle, Utah
William R. Miller, Jerry M. Motooka, John B. McHugh
1990, Miscellaneous Field Studies Map 2138-A
This map of the Richfield 1° x 2° quadrangle shows the regional distribution of barium in the less-than-0.180-mm (minus-80-mesh) fraction of stream sediments. It is part of a folio of maps of the Richfield 1° x 2° quadrangle, Utah, prepared under the Conterminuous United States Mineral Assessment Program. Other published...
Map showing distribution of bismuth and cadmium in stream-sediment samples, Richfield 1° x 2° quadrangle, Utah
William R. Miller, Jerry M. Motooka, John B. McHugh
1990, Miscellaneous Field Studies Map 2138-B
This map of the Richfield 1° x 2° quadrangle shows the regional distribution of bismuth and cadimum in the less-than-0.180-mm (minus-80-mesh) fraction of stream sediments. It is part of a folio of maps of the Richfield 1° x 2° quadrangle, Utah, prepared under the Conterminuous United States Mineral Assessment Program....
Map showing distribution of cadmium and antimony in the nonmagnetic fraction of heavy-mineral concentrates, Richfield 1° x 2° quadrangle, Utah
William R. Miller, Jerry M. Motooka, John B. McHugh
1990, Miscellaneous Field Studies Map 2137-A
This map of the Richfield 1° x 2° quadrangle, Utah, shows the regional distribution of cadmium and antimony in the nonmagnetic fraction of drainage-sediment samples. It is part of a folio of maps of the Richfield 1° x 2° quadrangle, Utah, prepared under the Conterminuous United States Mineral Assessment Program....
Map showing distribution of copper in stream-sediment samples, Richfield 1° x 2° quadrangle, Utah
William R. Miller, Jerry M. Motooka, John. B. McHugh
1990, Miscellaneous Field Studies Map 2138-C
This map of the Richfield 1° x 2° quadrangle shows the regional distribution of copper in the less-than-0.180-mm (minus-80-mesh) fraction of stream sediments. It is part of a folio of maps of the Richfield 1° x 2° quadrangle, Utah, prepared under the Conterminuous United States Mineral Assessment Program. Other published...
Map showing distribution of gold in stream-sediment samples, Richfield 1° x 2° quadrangle, Utah
W. R. Miller, J. M. Motooka, J. B. McHugh
1990, Miscellaneous Field Studies Map 2138-D
This map of the Richfield 1° x 2° quadrangle, Utah, shows the regional distribution of gold in the less-than-0.180-mm (minus-80-mesh) fraction of stream sediments. It is part of a folio of maps of the Richfield 1° x 2° quadrangle, Utah, prepared under the Conterminuous United States Mineral Assessment Program. Other...
Map showing the distribution of molybdenum in stream-sediment samples, Richfield 1° x 2° quadrangle, Utah
William R. Miller, Jerry M. Motooka, John B. McHugh
1990, Miscellaneous Field Studies Map 2138-E
This map of the Richfield 1° x 2° quadrangle, Utah, shows the regional distribution of lead in the less-than-0.180-mm (minus-80-mesh) fraction of stream sediments. It is part of a folio of maps of the Richfield 1° x 2° quadrangle, Utah, prepared under the Conterminuous United States Mineral Assessment Program. Other...
Map showing the distribution of molybdenum in stream-sediment samples, Richfield 1° x 2° quadrangle, Utah
William R. Miller, Jerry M. Motooka, John B. McHugh
1990, Miscellaneous Field Studies Map 2138-F
This map of the Richfield 1° x 2° quadrangle, Utah, shows the regional distribution of molybdenum in the less-than-0.180-mm (minus-80-mesh) fraction of stream-sediments. It is part of a folio of maps of the Richfield 1° x 2° quadrangle, Utah, prepared under the Conterminuous United States Mineral Assessment Program. Other published...
Map showing the distribution of silver in stream-sediment samples, Richfield 1° x 2° quadrangle, Utah
William R. Miller, Jerry M. Motooka, John B. McHugh
1990, Miscellaneous Field Studies Map 2138-G
This map of the Richfield 1° x 2° quadrangle, Utah, shows the regional distribution of silver in the less-than-0.180-mm (minus-80-mesh) fraction of stream-sediments. It is part of a folio of maps of the Richfield 1° x 2° quadrangle, Utah, prepared under the Conterminuous United States Mineral Assessment Program. Other published...
Map showing distribution of silver in the nonmagnetic fraction of heavy-mineral concentrates, Richfield 1° x 2° quadrangle, Utah
William R. Miller, Jerry M. Motooka, John B. McHugh
1990, Miscellaneous Field Studies Map 2137-B
This map of the Richfield 1° x 2° quadrangle, Utah, shows the regional distribution of silver in the nonmagnetic fraction of heavy-mineral concentrates of drainage-sediment samples. It is part of a folio of maps of the Richfield 1° x 2° quadrangle, Utah, prepared under the Conterminuous United States Mineral Assessment...
Map showing the distribution of thorium in stream-sediment samples, Richfield 1° x 2° quadrangle, Utah
William R. Miller, Jerry M. Motooka, John B. McHugh
1990, Miscellaneous Field Studies Map 2138-H
This map of the Richfield 1° x 2° quadrangle, Utah, shows the regional distribution of thorium in the less-than-0.180-mm (minus-80-mesh) fraction of stream-sediments. It is part of a folio of maps of the Richfield 1° x 2° quadrangle, Utah, prepared under the Conterminuous United States Mineral Assessment Program. Other published...
