Publications
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Provenance and diagenesis of the evaporite-bearing Burns formation, Meridiani Planum, Mars Provenance and diagenesis of the evaporite-bearing Burns formation, Meridiani Planum, Mars
Impure reworked evaporitic sandstones, preserved on Meridiani Planum, Mars, are mixtures of roughly equal amounts of altered siliciclastic debris, of basaltic provenance (40 ± 10% by mass), and chemical constituents, dominated by evaporitic minerals (jarosite, Mg-, Ca-sulfates ± chlorides ± Fe-, Na-sulfates), hematite and possibly secondary silica (60 ± 10%). These chemical constituents...
Authors
S. M. McLennan, J.F. Bell, W. M. Calvin, P. R. Christensen, B. C. Clark, P.A. de Souza, J. Farmer, W. H. Farrand, D.A. Fike, Ralf Gellert, A. Ghosh, T.D. Glotch, J.P. Grotzinger, B. Hahn, Kenneth E. Herkenhoff, J.A. Hurowitz, J. R. Johnson, S.S. Johnson, B. Jolliff, G. Klingelhofer, A.H. Knoll, Z. Learner, M. C. Malin, H.Y. McSween, J. Pocock, S. W. Ruff, Laurence A. Soderblom, S. W. Squyres, N.J. Tosca, W.A. Watters, M.B. Wyatt, A. Yen
Physical and chemical properties of submarine basaltic rocks from the submarine flanks of the Hawaiian Islands Physical and chemical properties of submarine basaltic rocks from the submarine flanks of the Hawaiian Islands
To evaluate physical and chemical diversity in submarine basaltic rocks, approximately 280 deep submarine samples recovered by submersibles from the underwater flanks of the Hawaiian Islands were analyzed and compared. Based on observations from the submersibles and hand specimens, these samples were classified into three main occurrence types (lavas, coarse-grained volcaniclastic rocks...
Authors
Hisayoshi Yokose, Peter W. Lipman, Toshiya Kanamatsu
Wagon loads of sand blows in White County, Illinois Wagon loads of sand blows in White County, Illinois
Several anecdotal accounts provide compelling evidence that liquefaction occurred at several sites in Illinois during the 1811-1812 New Madrid sequence, as much as 250 km north of the New Madrid seismic zone (NMSZ). At one Wabash Valley location, sand blows are still evident near Big Prairie, Illinois, a location described in a particularly detailed and precise historic account. This...
Authors
Susan E. Hough, Roger Bilham, Karl Mueller, William Stephenson, Robert Williams, Jack Odum
An assessment of volcanic threat and monitoring capabilities in the United States: Framework for a National Volcano Early Warning System An assessment of volcanic threat and monitoring capabilities in the United States: Framework for a National Volcano Early Warning System
Executive Summary NVEWS – a National Volcano Early Warning System – is being formulated by the Consortium of U.S. Volcano Observatories (CUSVO) to establish a proactive, fully integrated, national-scale monitoring effort that ensures the most threatening volcanoes in the United States are properly monitored in advance of the onset of unrest and at levels commensurate with the threats...
Authors
John W. Ewert, Marianne Guffanti, Thomas L. Murray
Geology and tsunamigenic potential of submarine landslides in Santa Barbara Channel, Southern California Geology and tsunamigenic potential of submarine landslides in Santa Barbara Channel, Southern California
A large submarine landslide complex and four small landslides developed under the Santa Barbara Channel, suggesting a potential hazard from landslide-generated tsunamis. We integrate offshore stratigraphy and geologic structure, multibeam bathymetric information, and several kinds of seismic-reflection data to understand how and when the submarine landslides formed. Seismic-reflection...
Authors
M. A. Fisher, W. R. Normark, H. Gary Greene, H.J. Lee, R. W. Sliter
Tilt recorded by a portable broadband seismograph: The 2003 eruption of Anatahan Volcano, Mariana Islands Tilt recorded by a portable broadband seismograph: The 2003 eruption of Anatahan Volcano, Mariana Islands
The horizontal components of broadband seismographs are highly sensitive to tilt, suggesting that commonly deployed portable broadband seismic sensors may record important tilt information associated with volcanic eruptions. We report on a tilt episode that coincides with the first historical eruption of Anatahan volcano on May 10, 2003. The tilt was recorded by a Strekheisen STS‐2...
Authors
D.A. Wiens, S.H. Pozgay, P.J. Shore, A.W. Sauter, R.A. White
Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2004 Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2004
The Alaska Volcano Observatory (AVO), a cooperative program of the U.S. Geological Survey, the Geophysical Institute of the University of Alaska Fairbanks, and the Alaska Division of Geological and Geophysical Surveys, has maintained seismic monitoring networks at historically active volcanoes in Alaska since 1988. The primary objectives of the seismic program are the real-time seismic...
Authors
James P. Dixon, Scott D. Stihler, John A. Power, Guy Tytgat, Steve Estes, Stephanie Prejean, John J. Sanchez, Rebecca Sanches, Stephen R. McNutt, John Paskievitch
Decadal-scale analysis of coastal landslides along the Big Sur coast: Rates and processes Decadal-scale analysis of coastal landslides along the Big Sur coast: Rates and processes
No abstract available.
Authors
Cheryl J. Hapke, Krystal R. Green
2004 volcanic activity in Alaska and Kamchatka: Summary of events and response of the Alaska Volcano Observatory 2004 volcanic activity in Alaska and Kamchatka: Summary of events and response of the Alaska Volcano Observatory
No abstract available.
Authors
Christina A. Neal, Robert G. McGimsey, Jim Dixon, Dmitry Melnikov
The 2003 phreatomagmatic eruptions of Anatahan volcano - Textural and petrologic features of deposits at an emergent island volcano The 2003 phreatomagmatic eruptions of Anatahan volcano - Textural and petrologic features of deposits at an emergent island volcano
Stratigraphic and field data are used in conjunction with textural and chemical evidence (including data from scanning electron microscope, electron microprobe, X-ray fluorescence, X-ray diffraction, and instrumental neutron activation analysis) to establish that the 2003 eruption of Anatahan volcano was mainly phreatomagmatic, dominated by explosive interaction of homogeneous...
Authors
J.S. Pallister, F. A. Trusdell, I. K. Brownfield, D. F. Siems, J. R. Budahn, S.F. Sutley
Experimental and geochemical evidence for derivation of the El Capitan Granite, California, by partial melting of hydrous gabbroic lower crust Experimental and geochemical evidence for derivation of the El Capitan Granite, California, by partial melting of hydrous gabbroic lower crust
Partial melting of mafic intrusions recently emplaced into the lower crust can produce voluminous silicic magmas with isotopic ratios similar to their mafic sources. Low-temperature (825 and 850°C) partial melts synthesized at 700 MPa in biotite-hornblende gabbros from the central Sierra Nevada batholith (Sisson et al. in Contrib Mineral Petrol 148:635–661, 2005) have major-element and...
Authors
K. Ratajeski, T. W. Sisson, A. F. Glazner
Advantageous GOES IR results for ash mapping at high latitudes: Cleveland eruptions 2001 Advantageous GOES IR results for ash mapping at high latitudes: Cleveland eruptions 2001
The February 2001 eruption of Cleveland Volcano, Alaska allowed for comparisons of volcanic ash detection using two‐band thermal infrared (10–12 μm) remote sensing from MODIS, AVHRR, and GOES 10. Results show that high latitude GOES volcanic cloud sensing the range of about 50 to 65°N is significantly enhanced. For the Cleveland volcanic clouds the MODIS and AVHRR data have zenith angles...
Authors
Yingxin Gu, William I. Rose, D.J. Schneider, G.J.S. Bluth, I.M. Watson