Publications
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Mount Mazama and Crater Lake: Growth and destruction of a Cascade volcano
For more than 100 years, scientists have sought to unravel the remarkable story of Crater Lake’s formation. Before Crater Lake came into existence, a cluster of volcanoes dominated the landscape. This cluster, called Mount Mazama (for the Portland, Oregon, climbing club the Mazamas), was destroyed during an enormous explosive eruption 7,700 years ago. So much molten rock was expelled that the summ
Authors
Edward P. Klimasauskas, Charles R. Bacon, Jim Alexander
Earthquake-volcano interactions
No abstract available.
Authors
David P. Hill, Fred Pollitz, Christopher Newhall
Physical data of soil profiles formed on late Quaternary marine terraces near Santa Cruz, California
The marine terraces in and around Santa Cruz, California, represent a set of well-preserved terraces formed as a product of geology, sea level, and climate. A marine terrace begins as a wave cut platform. Eustatic sea level changes, seacliff erosion, and tectonic uplift work together to generate marine terraces. "When a wave-cut platform is raised (due to tectonic activity) above sea level and cli
Authors
Jennie Munster, Jennifer W. Harden
Ancestral submarine growth of Kïlauea Volcano and instability of its south flank
Joint Japan-USA cruises in 1998-99 explored and sampled the previously unstudied deep offshore region south of Kilauea. Bathymetric features, dive observations, and recovered samples indicate that the 3-km-deep mid-slope bench, bounded seaward by a 2-km-high lower scarp, is underlain by massive turbidite sandstone and interbedded debris-flow breccia. Debris-flow clasts are submarineerupted (high-S
Authors
Peter W. Lipman, Thomas W. Sisson, Tadahide Ui, Jiro Naka, John R. Smith
Submarine landslides and volcanic features on Kohala and Mauna Kea volcanoes and the Hana Ridge, Hawaii
The deep submarine eastern flanks of Mauna Kea, Kohala, and Haleakala volcanoes were mapped for the first time with a multibeam bathymetric and sidescan sonar system during joint Japan-US cruises aboard the JAMSTEC vessel R/V Yokosuka in 1999. The Pololu slump off northeast Kohala is overlain by a carbonate platform in the shallow region and the deeper areas are incised by downslope oriented chann
Authors
J.R. Smith, Satake Kenji, J.K. Morgan, Peter W. Lipman
Submarine alkalic through tholeiitic shield-stage development of Kïlauea volcano, Hawai’i
The submarine Hilina region exposes a succession of magma compositions spanning the juvenile "Lō‘ihi" through tholeiitic shield stages of Kïlauea volcano. Early products, preserved as glass grains and clasts in volcaniclastic rocks of the 3000 m deep Hilina bench, include nephelinite, basanite, phonotephrite, hawaiite, alkali basalt, transitional basalt, and rare alkali-poor Mauna Loa-like tholeii
Authors
Thomas W. Sisson, Peter W. Lipman, J. Naka
Introduction to section 2 climax-stage magmatism: Growth history of Kïlauea volcano and its instability
No abstract available.
Authors
Peter W. Lipman
Soil chemistry and mineralogy of the Santa Cruz coastal terraces
Marine terraces in the central coast of California provide an opportunity to study a soil chronosequence in which similar materials (beach deposits) have been weathered under similar slope, climatic, and vegetation conditions during the Quaternary. The terraces between Santa Cruz and Año Nuevo, California, have been studied for decades and are thought to be one of the best example of marine terrac
Authors
Colin Pinney, Jacob Aniku, Raymond Burke, Jennifer Harden, Michael Singer, Jennie Munster
Hawaiian Volcano Observatory summary 101: Part 1, seismic data, January to December 2001
The Hawaiian Volcano Observatory (HVO) summary presents seismic data gathered during the year and a chronological narrative describing the volcanic events. The seismic summary is offered without interpretation as a source of preliminary data. It is complete in the sense that all data for events of M>1.5 routinely gathered by the Observatory are included. The emphasis in collection of tilt and defo
Authors
Jennifer S. Nakata, C. Heliker
Osmium isotope constraints on lower crustal recycling and pluton preservation at Lassen Volcanic Center, CA
Osmium isotope compositions of intermediate- to silicic-composition calc-alkaline volcanic rocks from the Lassen volcanic region of the Cascade arc are significantly more radiogenic (γOs=+23 to +224) than typical mantle. These evolved arc rocks in the Lassen region have unradiogenic Sr, Nd, and Pb isotope compositions which overlap with those of contemporaneous mafic lavas. Crystal fractionation o
Authors
Garret L. Hart, Clark M. Johnson, Steven B. Shirey, Michael A. Clynne
Tension cracks, eruptive fissures, dikes, and faults related to late Pleistocene-Holocene basaltic volcanism and implications for the distribution of hydraulic conductivity in the eastern Snake River Plain, Idaho
No abstract available.
Authors
Mel A. Kuntz, Steven R. Anderson, Duane E. Champion, Marvin A. Lanphere, Daniel J. Grunwald
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