Review of the Origin of the Braid Scarp near the Peeble Prospect, Southwestern Alaska.

摘要

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 11-16 thousand years ago. We found no evidence for active faulting along the scarp.