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Unformatted text preview: Hawaiian Volcano Flank Stability Appraised F rom Strength Testing the Hawaiian Scientific D rilling Project's (HSDP) 3.1-km D rill Core Thompson, N - Department of Geological Sciences and Engineering, University of Nevada, Reno, Reno, NV 89557 Watters, R J - Department of Geological Sciences and Engineering, University of Nevada, Reno, Reno, NV 89557 Schiffman, P- Department of Geology, University of California, Davis, Davis, Ca 95616 Strength results from limited testing of HSDP core samples reveal significant differences in their unconfined compressive and shear strength. The median strength values show a progressive increase from the incipient (2.4 MPa) to smectitic (4.2 MPa) to palagonitic (9.4 MPa) alteration zones. The strength differences include differences among hyaloclastites as a function of their alteration, as well as differences between hyaloclastites and the various forms of lava flows and intrusive bodies. The unconfined compressive strengths of extrusive submarine and subaerial lavas and intrusive rocks from the HSDP core samples are much...
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- Spring '08