Investigator’s Annual Reports (IAR’s) for Crater Lake National Park
Physical Characteristics of the Cleetwood Air-fall Tephra: Implications for controls upon silicic volcanic eruptive styles. Density distribution study of Cleetwood Eruption
Report Number: 12809
Permit Number: CRLA1997ASPD
Date Received: Jan 01, 1998
Reporting Year: 1997
Principal Investigator: Renee Bourgeois, University of Oregon, Department of Geological Sciences, Eugene, OR
Additional investigator(s): Dr. Katherine Cashman
Park-assigned Study Id. #: CRLA1997ASPD
Permit Expiration Date: Jan 01, 1998
Permit Start Date: Jan 01, 1997
Study Starting Date: Jan 01, 1997
Study Ending Date: Jan 01, 1997
Study Status: Completed
Activity Type: Research
Subject/Discipline: Geostructure / Tectonics
Objectives: Density distribution of stratigraphic layers of Cleetwood airfall deposits; Determine the degassing history of the Cleetwood magma.
Findings and Status: *All collecting completed: 35 layers sampled in total (100 clasts per layer);*Specimens stored at Univ of OR, Dept of Geological Sciences.;*Currently in the process of weighing pumice clasts to determine density, to help select claste to be imaged on SEM (scanning electron microscope).
For this study, were one or more specimens collected and removed from the park but not destroyed during analyses? No
Funding provided this reporting year by NPS: 0
Funding provided this reporting year by other sources: 2000
Full name of college or university: n/a
Annual funding provided by NPS to university or college this reporting year: 0
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