Geological Society of America

8:05 AM

RADIOMETRIC DATING OF THREE SISTERS VOLCANIC FIELD

Andrew Calvert, U.S. Geol Survey, Menlo Park, CA and Wes Hildreth, US Geol Survey, Menlo Park, CA

33785 (THEME SESSIONS)

8:20 AM

ONGOING MAGMA INTRUSION BENEATH THE THREE SISTERS VOLCANIC CENTER, CENTRAL OREGON CASCADE RANGE, USA, INFERRED FROM SATELLITE INSAR

Charles W. Wicks, U.S. Geol. Survey, Menlo Park, CA and Daniel Dzurisin, U. S. Geol. Survey, Vancouver, WA and Steven Ingebritsen, U. S. Geol. Survey, Menlo Park, CA and Wayne Thatcher, U.S. Geol. Survey, Menlo Park, CA and Zhong Lu, U. S. Geol. Survey, Sioux Falls, SD and Justin Iverson, Oregon State Univ, Corvallis, OR

34789 (THEME SESSIONS)

8:35 AM

CO2 AND H2S IN THE AIR OVER THE GROUND-SWELLING AREA WEST OF SOUTH SISTER VOLCANO, CENTRAL OREGON CASCADE RANGE

Terrence M. Gerlach, Cascades Volcano Observatory, Vancouver, WA and Kenneth A. McGee, Cascades Volcano Observatory, Vancouver, WA and Michael P. Doukas, Cascades Volcano Observatory, Vancouver, WA

34463 (THEME SESSIONS)

8:50 AM

MAGMA INTRUSION RATE IN THE THREE SISTERS AREA OF THE CENTRAL OREGON CASCADES INFERRED BY DIFFERENT METHODS

William C. Evans, U.S. Geol. Survey, Menlo Park, CA and Steve E. Ingebritsen, U.S. Geol. Survey, Menlo Park, CA and Charles W. Wicks, U.S. Geol. Survey, Menlo Park, CA and Robert H. Mariner, U.S. Geol. Survey, Menlo Park, CA and B. Mack Kennedy, Lawrence Berkeley National Lab, Berkeley, CA and Matthias C. van Soest, Lawrence Berkeley National Lab, Berkeley, CA

34489 (THEME SESSIONS)

9:05 AM

USGS RESPONSE TO ONGOING CRUSTAL UPLIFT AT THREE SISTERS VOLCANIC CENTER, OREGON

William E. Scott, US Geol Survey, Vancouver, WA

33707 (THEME SESSIONS)

9:20 AM

THE LEGACY OF A CHRONIC HAZARD-- SEDIMENT REDISTRIBUTION FOLLOWING EXPLOSIVE ERUPTIONS

Jon J. Major, U.S. Geol Survey, Vancouver, WA

33875 (THEME SESSIONS)

9:35 AM

RECENT NON-ERUPTIVE DEBRIS FLOWS AT MT. HOOD, OREGON

Thomas G. DeRoo, Mount Hood National Forest, Sandy, OR and Christopher D. Hedeen, Colton High School, Colton, OR

34582 (THEME SESSIONS)

9:50 AM

POST-ERUPTION GLACIER DEVELOPMENT WITHIN THE CRATER OF MOUNT ST. HELENS, WASHINGTON, U.S.A

Steve P. Schilling, Cascades Volcano Observatory, Vancouver, WA and Paul E. Carrara, U.S. Geological Survey, Denver, CO and Ren A. Thompson, U.S. Geological Survey, Denver, CO and Eugene Y. Iwatsubo, Cascades Volcano Observatory, Vancouver, WA

34427 (THEME SESSIONS)

10:20 AM

THE MOUNT BACHELOR VOLCANIC CHAIN – A MODEL FOR FUTURE MAFIC ERUPTIONS IN THE CENTRAL OREGON HIGH CASCADES

C. A. Gardner, U.S. Geological Survey, Vancouver, WA and W. E. Scott, U.S. Geological Survey, Vancouver, WA

33405 (THEME SESSIONS)

10:35 AM

BASALTIC ANDESITE AND PALAGONITIC TUFF AT NORTH SISTER VOLCANO, OREGON HIGH CASCADES

Mariek E. Schmidt, Oregon State Univ, Corvallis, OR and Anita L. Grunder, Oregon State Univ, Corvallis, OR and Richard M. Conrey, Washington State Univ, Pullman, WA

34561 (THEME SESSIONS)

10:50 AM

DESERT SPRING TUFF, CENTRAL OREGON CASCADE RANGE: NEW PERSPECTIVES ON SOURCE, GENESIS, AND HAZARDS

R. M. Conrey, Washington State Univ, Pullman, WA and E. M. Taylor, Oregon State Univ, Corvallis, OR and D. R. Sherrod, USGS, Hi Natl Park, HI and J. M. Donnelly-Nolan, USGS, Menlo Park, CA and T. D. Bullen, USGS, Menlo Park, CA

34775 (THEME SESSIONS)

11:05 AM

A QUANTITATIVE TEXTURAL ANALYSIS OF PYROCLASTS FROM THE ERUPTIVE EVENTS OF 1980 AT MOUNT ST. HELENS

Siobhan R. McConnell, Eugene, OR and Katharine V. Cashman, Univ Oregon, Eugene, OR

33723 (THEME SESSIONS)

11:20 AM

A FUNDAMENTAL ROLE FOR PROCESS MODELS IN VOLCANIC HAZARD ASSESSMENTS

Brittain E. Hill, Southwest Rsch Institute, San Antonio, TX

33867 (THEME SESSIONS)

35 Hazards and Risks from Cascade Volcanoes

Presentations