Review of the origin of the Braid Scarp near the Pebble prospect, southwestern Alaska

Open-File Report 2011-1028
By:  and 

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Abstract

A linear geomorphic scarp, referred to as the 'Braid Scarp,' lies about 5 kilometers north of Iliamna Lake, Alaska, and has been identified as a possible seismically active fault. We examined the geomorphology of the area and an 8.5-meter-long excavation across the scarp. We conclude that the scarp was formed by incision of a glacial outwash braid plain into a slightly older outwash plain as ice stagnated in the region during deglaciation 11-15 thousand years ago. We found no evidence for active faulting along the scarp.

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Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title Review of the origin of the Braid Scarp near the Pebble prospect, southwestern Alaska
Series title Open-File Report
Series number 2011-1028
DOI 10.3133/ofr20111028
Year Published 2011
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Alaska Science Center
Description iii, 14 p.
Country United States
Additional Online Files (Y/N) N