Publications
Filter Total Items: 3083
Cretaceous mid-crustal metamorphism and exhumation of the Koolen gneiss dome, Chukotka Peninsula, northeastern Russia Cretaceous mid-crustal metamorphism and exhumation of the Koolen gneiss dome, Chukotka Peninsula, northeastern Russia
No abstract available.
Authors
Vyacheslav V Akinin, Andrew T. Calvert
Fate of carbon in Alaskan Landscapes Project: Database for soils from eddy covariance tower sites, Delta Junction, AK Fate of carbon in Alaskan Landscapes Project: Database for soils from eddy covariance tower sites, Delta Junction, AK
Soils in Alaska, and in high latitude terrestrial ecosystems in general, contain significant amounts of organic carbon, most of which is believed to have accumulated since the start of the Holocene about 10 ky before present. High latitude soils are estimated to contain 30-40% of terrestrial soil carbon (Melillo et al., 1995; McGuire and Hobbie, 1997), or ~ 300-400 Gt C (Gt = 1015 g)...
Authors
Stagg King, Jennifer Harden, Kristen L. Manies, Jennie Munster, L. Douglas White
Response plan for volcano hazards in the Long Valley Caldera and Mono Craters region, California Response plan for volcano hazards in the Long Valley Caldera and Mono Craters region, California
No abstract available.
Authors
David P. Hill, Daniel Dzurisin, William L. Ellsworth, Elliot T. Endo, D. L. Galloway, Terry M. Gerlach, Malcolm S.J. Johnston, John O. Langbein, Ken A. McGee, C. Dan Miller, David Oppenheimer, Michael L. Sorey
Analysis of long-period events recorded at Mount Etna (Italy) in 1992, and their relationship to eruptive activity Analysis of long-period events recorded at Mount Etna (Italy) in 1992, and their relationship to eruptive activity
Seismic activity recorded at Mount Etna during 1992 was characterized by long-period (LP) events and tremor with fluctuating amplitudes. These signals were associated with the evolution of the eruptive activity that began on December 14, 1991. Following the occurrence of numerous volcano-tectonic earthquakes at the onset of the eruption, LP events dominated the overall seismicity...
Authors
S. Falsaperla, Eugenio Privitera, Bernard A. Chouet, Phillip B. Dawson
Anderson receives 2001 Bowen Award Anderson receives 2001 Bowen Award
Alfred T. Anderson, Jr. received the Bowen Award, presented by the Volcanology, Geochemistry, and Petrology Section at the 2001 Fall Meeting in San Francisco, California, last December.
Authors
Charles R. Bacon, Alfred T. Anderson
Whole-rock and glass major-element geochemistry of Kilauea Volcano, Hawaii, near-vent eruptive products: September 1994 through September 2001 Whole-rock and glass major-element geochemistry of Kilauea Volcano, Hawaii, near-vent eruptive products: September 1994 through September 2001
This report presents major-element geochemical data for glasses and whole-rock aliquots among 523 lava samples collected near the vent on Kilauea's east rift zone between September 1994 and October 2001. Information on sample collection, analysis techniques and analytical standard reproducibility are presented as a PDF file, which also includes a detailed explantion of the categories of...
Authors
Carl R. Thornber, David R. Sherrod, David F. Siems, Christina C. Heliker, Gregory P. Meeker, Robert L. Oscarson, James P. Kauahikaua
Volcanic breccia and hyaloclastite in blocks from the Nuuanu and Wailau landslides, Hawaii Volcanic breccia and hyaloclastite in blocks from the Nuuanu and Wailau landslides, Hawaii
Steep slopes of giant landslide blocks in the Nuuanu and Wailau landslides expose fragmental volcanic rocks subdivided into monomict and polymic t hyaloclastite and breccia. The various samples form as 1) secondary slopemantling unlithified polymict breccia consisting of clasts set in a mud matrix; 2 ) monomict and polymict hyaloclastite and polymict breccia, with zeolite cement, that...
Authors
D. Clague, James G. Moore, A. S. Davis
Seismicity, gas emission and deformation from 18 July to 25 September 1995 during the initial phreatic phase of the eruption of Soufrière Hills Volcano, Montserrat Seismicity, gas emission and deformation from 18 July to 25 September 1995 during the initial phreatic phase of the eruption of Soufrière Hills Volcano, Montserrat
On 18 July 1995, after more than three years of irregularly increasing seismicity, phreatic explosions opened a new vent on Soufrière Hills Volcano, about 4 km east of the capital city of Plymouth, Montserrat. By early August 1995, the volcano was monitored by a nine-station seismic network, three telemetered electronic tiltmeters, and daily correlation spectroscopy (COSPEC) flights to...
Authors
Cynthia A. Gardner, Randall A. White
Paleoenvironments of sedimentary interbeds in the Pliocene and Quaternary Big Lost Trough, eastern Snake River Plain, Idaho Paleoenvironments of sedimentary interbeds in the Pliocene and Quaternary Big Lost Trough, eastern Snake River Plain, Idaho
No abstract available.
Authors
Erick A. Bestland, Paul K. Link, Marvin A. Lanphere, Duane E. Champion
Accumulation and subsidence of the Pleistocene basaltic lava flows of the eastern Snake River Plain, Idaho Accumulation and subsidence of the Pleistocene basaltic lava flows of the eastern Snake River Plain, Idaho
No abstract available.
Authors
Duane E. Champion, Marvin A. Lanphere, Steven R. Anderson, Mel A. Kuntz
The Fish Canyon magma body, San Juan volcanic field, Colorado: Rejuvenation and eruption of an upper-crustal batholith The Fish Canyon magma body, San Juan volcanic field, Colorado: Rejuvenation and eruption of an upper-crustal batholith
More than 5000 km3 of nearly compositionally homogeneous crystal-rich dacite (∼68 wt % SiO2: ∼45% Pl + Kfs + Qtz + Hbl + Bt + Spn + Mag + Ilm + Ap + Zrn + Po) erupted from the Fish Canyon magma body during three phases: (1) the pre-caldera Pagosa Peak Dacite (an unusual poorly fragmented pyroclastic deposit, ∼200 km3); (2) the syn-collapse Fish Canyon Tuff (one of the largest known...
Authors
Olivier Bachmann, Michael A. Dungan, Peter W. Lipman
Structure and physical characteristics of pumice from the climactic eruption of Mount Mazama (Crater Lake), Oregon Structure and physical characteristics of pumice from the climactic eruption of Mount Mazama (Crater Lake), Oregon
The vesicularity, permeability, and structure of pumice clasts provide insight into conditions of vesiculation and fragmentation during Plinian fall and pyroclastic flow-producing phases of the ~7,700 cal. year B.P. climactic eruption of Mount Mazama (Crater Lake), Oregon. We show that bulk properties (vesicularity and permeability) can be correlated with internal textures and that the...
Authors
C. Klug, K. Cashman, Charles R. Bacon