Publications
Filter Total Items: 7221
Modeling of fluidized ejecta emplacement over digital topography on Venus
The FLOW computer model of McEwen and Malin (1989) modified for application to the study of Venus fluidized ejecta blankets (FEBs) demonstrates that relatively low viscosities, yield strengths, and initial velocities are required to duplicate the observed flow paths of the outflow materials. The model calculates the velocities and simulated flow paths of gravity flows over Magellan topography. The
Authors
Jeffrey R. Johnson, Lisa R. Gaddis
Intermediate‐depth intraslab earthquakes and arc volcanism as physical expressions of crustal and uppermost mantle metamorphism in subducting slabs
We elaborate on the well-known spatial association between axc volcanoes and Wadati Benioff zones and explore in detail their genetic relationships as dual physical expressions of slab metamorphism of the oceanic crust and uppermost mantle. At hypocentral depths less than 200 km intra slab Wadati-Benioff earthquakes tend to occur near the top surfaces of slabs. Subduction of very young lithosphere
Authors
Stephen H. Kirby, E. Robert Engdahl, Roger P. Denlinger
Decomposition of AVIRIS spectra: Extraction of spectral reflectance, atmospheric, and instrumental components
Presents techniques that use only information contained within a raw, high-spectral-resolution, hyperspectral Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) scene to estimate and remove additive components (atmospheric scattering and instrument dark current). These techniques allow normalization of multiplicative components (instrument gain, topography, atmospheric transmission) and enhan
Authors
Lisa R. Gaddis, Laurence A. Soderblom, Hugh H. Kieffer, Kris J. Becker, James M. Torson, Kevin F. Mullins
Quake Forecasting- An Emerging Capability
No abstract available.
Authors
Andrew Michael, Paul Reasenberg, Peter H. Stauffer, James W. Hendley
Hydrologic data for Long Valley Caldera, Mono County, California, 1987-93
Hydrologic data were collected during 1987-93 as part of the U.S. Geological Survey's long-term Volcanic Hazards Monitoring Program of the Long Valley Caldera, Mono County, California. The data are presented in graphs or tables. Data collected for the Long Valley Hydrologic Advisory Committee monitoring program also are presented. Hydrologic data collected include continuous record of ground-water
Authors
J. F. Howle, C. D. Farrar
Breaching the levee of a channel on the Mississippi Fan
GLORIA images of the youngest channel on the Mississippi Fan indicate that it has not been a stable feature, but instead has shifted its course several times. A detailed study of a site of channel shifting found a complex stratigraphy that resulted from one episode of channel avulsion. The channel avulsion appears to have been initiated by a large mass flow that choked the channel below the point
Authors
David C. Twichell, William C. Schwab, Neil H. Kenyon, Homa J. Lee
Gull of Mexico and Caribbean EEZ: Part III
No abstract available.
Authors
David C. Twichell, Kathryn M. Scanlon, William P. Dillon
Morphology of carbonate escarpments as an indicator of erosional processes
No abstract available.
Authors
David C. Twichell, William P. Dillon, Charles K. Paull, Neil H. Kenyon
The stable oxygen and carbon isotopic record from a coral growing in Florida Bay: a 160 year record of climatic and anthropogenic influence
A 160 year record of skeletal δ13C and δ18O was examined in a specimen of the coral Solenastrea bournonigrowing in Florida Bay. Variations in the δ18O of the skeleton can be correlated to changes in salinity while changes in the δ13C reflect cycling of organic material within the Bay. Based on the correlation between salinity and skeletal δ18O, we have concluded that there has been no long term in
Authors
Peter K. Swart, Genevieve F. Healy, Richard E. Dodge, Philip Kramer, J. Harold Hudson, Robert B. Halley, Michael B. Robblee
Characteristics of the continental slope and rise off North Carolina from GLORIA and seismic-reflection data: The interaction of downslope and contour current processes
No abstract available.
Authors
Peter Popenoe, William P. Dillon
No rocks, no water, no ecosystem: geoscience contributes to the understanding of water-quality programs in the Florida Keys
No abstract available.
Authors
Eugene A. Shinn
Sedimentary processes in the salt deformation province of the Texas-Louisiana continental slope
No abstract available.
Authors
David C. Twichell, Catherine M. Delorey