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The Biderbost site: exploring migration and trade on the social landscape of the Pacific Northwest

Gallagher, Anna (2016) The Biderbost site: exploring migration and trade on the social landscape of the Pacific Northwest. Undergraduate Thesis, University of Pittsburgh. (Unpublished)

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The Biderbost site of Duvall, Washington presents an interesting archaeological case for investigating trade and migration. The extensive lithic remains contain several stylistic traits of regional groups, but incomplete excavation records hinder most traditional archaeological analyses. Instead, an analysis of tool style suggested particular tools at the Biderbost were remnants of regional trade. Additionally, a portable X-Ray Fluorescence Spectrometry study was able to accurately identify the source of several pieces of Biderbost obsidian. The results of these two analyses provided potentially conflicting conclusions regarding trade and migration in the Pacific Northwest. Ultimately, patterns in the site’s stratigraphy indicating periods of abandonment may resolve these conflicting results through the possibility of multiple site occupations. The results from this analysis hold a variety of implications for the region and emphasize the importance of combing traditional archaeological methods and archaeometric methods.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Gallagher, Annaaeg46@pitt.eduAEG46
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairAllen,
Committee MemberBarton,
Committee MemberArkush,
Committee MemberHomsey-Messer,
Date: 18 May 2016
Date Type: Publication
Defense Date: 30 March 2016
Approval Date: 18 May 2016
Submission Date: 16 April 2016
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Number of Pages: 63
Institution: University of Pittsburgh
Schools and Programs: David C. Frederick Honors College
Dietrich School of Arts and Sciences > Anthropology
Degree: BPhil - Bachelor of Philosophy
Thesis Type: Undergraduate Thesis
Refereed: Yes
Uncontrolled Keywords: Biderbost Site; migration; trade; adze; projectile point; Pacific Northwest; Archaeology; Burke Museum; Seattle; Washington; lithic; pXRF; portable x-ray florescence; obsidian; analysis; nephrite; serpentine; raw material; occupation; abandonment; social landscape; 45SN100
Date Deposited: 18 May 2016 20:06
Last Modified: 15 Nov 2016 14:32


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