Conference Papers
Science Quality and Integrity
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.
Filter Total Items: 5547
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
Illite crystallite thickness by X-ray diffraction Illite crystallite thickness by X-ray diffraction
No abstract available
Authors
D. D. Eberl, A.E. Blum
Immunostimulation and protection from diseases in rainbow trout by glucans given by injection or bath Immunostimulation and protection from diseases in rainbow trout by glucans given by injection or bath
No abstract available at this time.
Authors
D. P. Anderson, G. Jeney
Influence of long term climate change on net infiltration at Yucca Mountain, Nevada Influence of long term climate change on net infiltration at Yucca Mountain, Nevada
Net infiltration and recharge at Yucca Mountain, Nevada, a potential site for a high level nuclear waste repository, are determined both by the rock properties and past and future changes in climate. A 1-dimensional model was constructed to represent a borehole being drilled through the unsaturated zone. The rock properties were matched to the lithologies expected to be encountered in...
Authors
Alan I. Flint, Lorraine E. Flint, Joseph A. Hevesi
Influence of seasonal climatic variability on shallow infiltration at Yucca Mountain Influence of seasonal climatic variability on shallow infiltration at Yucca Mountain
To analyze infiltration and the redistribution of moisture in alluvial deposits at Yucca Mountain, water content profiles at a 13.5 m deep borehole were measured at monthly intervals using a neutron moisture probe. Increases in water content to a maximum depth of 1.8 m in response to winter season precipitation were noted. Below a depth of 1.8 m, a gradual drying trend was indicated. A...
Authors
Joseph A. Hevesi, Alan L. Flint
Instrumentation for detailed bridge-scour measurements Instrumentation for detailed bridge-scour measurements
A portable instrumentation system is being developed to obtain channel bathymetry during floods for detailed bridge-scour measurements. Portable scour measuring systems have four components: sounding instrument, horizontal positioning instrument, deployment mechanisms, and data storage device. The sounding instrument will be a digital fathometer. Horizontal position will be measured...
Authors
Mark N. Landers, David S. Mueller, Roy E. Trent
Instrumentation for detailed bridge-scour measurements Instrumentation for detailed bridge-scour measurements
No abstract available
Authors
M. N. Landers, S. Mueller, R.E. Trent
Isotopic and trace element variability in altered and unaltered tuffs at Yucca Mountain, Nevada Isotopic and trace element variability in altered and unaltered tuffs at Yucca Mountain, Nevada
Reference stratigraphic sections near Yucca Mountain, Nevada were established and sampled in outcrop areas where the volcanic rocks have been minimally altered. Isotopic and trace element analyses obtained for these reference sections are baseline data for assessing the degree and extent of element mobility attendant with past zonal alteration of the rock mass. In agreement with earlier...
Authors
Z. E. Peterman, R.W. Spengler, F.R. Singer, R. P. Dickerson
Isotopic evidence of complex ground-water flow at Yucca mountain, Nevada, USA Isotopic evidence of complex ground-water flow at Yucca mountain, Nevada, USA
Strontium isotopes (expressed as per mill deviation from mean sea water, ??87Sr) reflect interaction between ground water and the aquifer through which it is flowing. In the Cenozoic aquifer of the Yucca Mountain region, ??87Sr values increase from north to south downgradient in the flow system. The largest ??87Sr values occur in the Amargosa Desert where ground water probably encounters...
Authors
Zell E. Peterman, John S. Stuckless