Title

Sedimentology of Terrace Deposits near Beverly Beach, Oregon. Framework for Geologic Hazards and Their Mitigation

Date

5-30-2013 9:30 AM

Location

Health and Wellness Center (HWC) Room 105

Department

Earth Science

Session Chair

Jeff Myers

Session Title

Earth Science Senior Seminar Research: Geological Hazards Impacting US 101 at Beverly Beach, Oregon, and their Mitigation

Faculty Sponsor(s)

Jeff Myers

Presentation Type

Presentation

Abstract

US Highway 101 along the Oregon Coast near Beverly Beach is deteriorated due to active landslides. This highway is built on the high-stand Pleistocene terraces consisting of sand and pebble beds. In addition to their marine sedimentary character, the beds dip westward and increase the potential for landslides. These landslides occur at the contact of two geologic units: permeable Pleistocene deposits and the less permeable underlying Miocene deposits. Analysis of marine terrace sediments near Beverly Beach such as: permeability, porosity, degree of lithification, and percentage of clay content will be used to determine the shear stress resistance. The results will be used to interpret how terrace deposits increase the potential for landslides.

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May 30th, 9:30 AM

Sedimentology of Terrace Deposits near Beverly Beach, Oregon. Framework for Geologic Hazards and Their Mitigation

Health and Wellness Center (HWC) Room 105

US Highway 101 along the Oregon Coast near Beverly Beach is deteriorated due to active landslides. This highway is built on the high-stand Pleistocene terraces consisting of sand and pebble beds. In addition to their marine sedimentary character, the beds dip westward and increase the potential for landslides. These landslides occur at the contact of two geologic units: permeable Pleistocene deposits and the less permeable underlying Miocene deposits. Analysis of marine terrace sediments near Beverly Beach such as: permeability, porosity, degree of lithification, and percentage of clay content will be used to determine the shear stress resistance. The results will be used to interpret how terrace deposits increase the potential for landslides.