Relationships Between Snake River Paleofloods, Occupational Patterns and Archaeological Preservation at Redbird Beach Archaeological Site in Lower Hells Canyon, Idaho

Author

Tabitha Trosper, Central Washington University

Document Type

Thesis

Date of Degree Completion

Summer 2011

Degree Name

Master of Science (MS)

Department

Geological Sciences

Committee Chair

Lisa Ely

Second Committee Member

Charles C. Rubin

Third Committee Member

Steven Hackenberger

Abstract

The Snake River basin drains 282,000 km² of the northwestern U.S. and is the largest tributary to the Columbia River. Redbird Beach, an archaeological site located in the lower Hells Canyon reach of the Snake River, contains extensive vertical exposures of archaeological materials interbedded with Snake River flood sediments. Redbird Beach formed in the lee of the Redbird Creek debris fan, is composed of interfingering deposits from large floods on the Snake River and locally-derived alluvial sediments from Redbird Creek. Through stratigraphic analyses of slackwater deposits, this study compares the temporal and spatial patterns of human occupation at Redbird Beach with variations in the magnitude and frequency of floods from the Snake River. Results of this study will form a key component of a regional synthesis of floods and climate change in the inland Northwestern U.S., and contribute to our understanding of the archaeological record along this major regional waterway.

Recommended Citation

Trosper, Tabitha, "Relationships Between Snake River Paleofloods, Occupational Patterns and Archaeological Preservation at Redbird Beach Archaeological Site in Lower Hells Canyon, Idaho" (2011). All Master's Theses. 1458.
https://digitalcommons.cwu.edu/etd/1458