Conference Papers
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Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.
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Geologic assessments and characterization of marine sand resources - Gulf of Mexico region Geologic assessments and characterization of marine sand resources - Gulf of Mexico region
The U.S. Geological Survey conducts geologic surveys and research in marine areas of the United States and its territories and possessions. An objective in some of the investigations is locating and evaluating marine sand and gravel resources and interpretation of the origins of the sand body deposits. Results from such studies over the past 30 years show that many extremely large...
Authors
S. Jeffress Williams, Helana A. Cichon
Geological characterization of selected offshore sand resources on the OCS, offshore Alabama, for beach nourishment Geological characterization of selected offshore sand resources on the OCS, offshore Alabama, for beach nourishment
Most Alabama Gulf and estuarine shoreline is undergoing long-term erosion; threatened shorelines will need programs of replenishment and maintenance if they are to be even temporarily stabilized. Highest priority beach replenishment areas include eastern Dauphin Island; west of Perdido Pass; and west of the inlet at Little Lagoon. There are no appropriate local onshore sand sources...
Authors
David J. Davies, Steven J. Parker, W. Everett Smith
Geophysical investigations of buried volcanic centers near Yucca Mountain, Southwest Nevada Geophysical investigations of buried volcanic centers near Yucca Mountain, Southwest Nevada
Several aeromagnetic dipolar anomalies occur over flat, alluvial areas near Yucca Mountain that resemble anomalies typically associated with subaerial basaltic volcanic centers. Detailed gravity and ground magnetic data were collected along a surveyed traverse across an aeromagnetic anomaly in Amargosa Valley, south of Yucca Mountain, Nevada. Modeling of the ground magnetic data...
Authors
V.E. Langenheim, K. S. Kirchoff-Stein, H. W. Oliver
Geophysical investigations of concealed faults near Yucca Mountain, Southwest Nevada Geophysical investigations of concealed faults near Yucca Mountain, Southwest Nevada
Detailed gravity and ground magnetic data collected along surveyed traverses across Midway Valley, on the eastern flank of Yucca Mountain, Nevada reveal that these methods can be used to delineate concealed faults. These studies are part of an effort to evaluate faulting in the vicinity of the proposed surface facilities for a potential nuclear waste repository at Yucca Mountain. The...
Authors
D. A. Ponce
Geyser's magma chamber, California: constraints from gravity data, density measurements, and well information Geyser's magma chamber, California: constraints from gravity data, density measurements, and well information
A new crustal model based on isostatic residual gravity, geologic mapping, well information, and density measurements shows that the high-gradient parts of the residual gravity anomaly can be explained in terms of lithologic variations within the upper 7 km of the crust, consistent with the upper-crustal framework of the area. This conclusion does not rule out the presence of a magma...
Authors
Richard J. Blakely, W. D. Stanley
GPS network operations for the International GPS Geodynamics Service GPS network operations for the International GPS Geodynamics Service
As GPS technology comes of age in the 1990’s, it is evident that an internationally sponsored GPS tracking system is called for to provide consistent, timely ground tracking data and data products to the geophysical community. The planning group for the International GPS Geodynamics Service (IGS), sponsored by the International Association of Geodesy (IAG), is addressing all elements of...
Authors
Ruth E. Neilan
Gravity and magnetic studies of the Wind River Reservation, Wyoming Gravity and magnetic studies of the Wind River Reservation, Wyoming
No abstract available
Authors
R.P. Kucks
Habitat use patterns of wintering shorebirds at the San Diego Bay, California. Symposium on the Behavior, Ecology, and Conservation of Western Hemisphere Shorebirds Habitat use patterns of wintering shorebirds at the San Diego Bay, California. Symposium on the Behavior, Ecology, and Conservation of Western Hemisphere Shorebirds
No abstract available at this time
Authors
B.E. Kus
Heat-flow studies in the northwest geysers geothermal field, California Heat-flow studies in the northwest geysers geothermal field, California
Temperature and thermal conductivity data were acquired from 3 idle production wells in the Northwest Geysers. Heat-flow profiles derived from data recorded in the caprock which overlies the steam reservoir reveal a decrease of heat flow with depth in 2 of the 3 wells. These observations contradict the generally accepted theory that conductive heat flow is constant with depth within The...
Authors
Colin F. Williams, S. Peter Galanis, Thomas H. Moses, Frederick V. Grubb
Hematological and serological assays to determine fish health Hematological and serological assays to determine fish health
No abstract available at this time
Authors
D. P. Anderson, A.K. Siwicki
Holocene sedimentation and coastal wetlands response to rising sea level at the Aucilla river mouth, a low energy coast in the Big Bend area of Florida Holocene sedimentation and coastal wetlands response to rising sea level at the Aucilla river mouth, a low energy coast in the Big Bend area of Florida
The shallow dip of the Florida carbonate platform results in low wave energy on Florida ???Big Bend??? coasts. Therefore sedimentation is dominated by river-and tidal-hydrodynamics near the Aucilla River mouth. Where present, Holocene sediments are thin and unconformably overlie Oligocene-aged Suwannee Limestone. The oldest unlithified sediments include reworked carbonate rubble with...
Authors
Connie Garrett, Heidi Hertler, Ronald Hoenstine, Brad Highley