The Archaeology of Obsidian Occurrence Across Stone Tool Manufacture and Use Along the mid-Columbia River, Washington
Document Type
Oral Presentation
Campus where you would like to present
SURC Ballroom C/D
Start Date
15-5-2014
End Date
15-5-2014
Keywords
Archaeology, Obsidian Sourcing, Toolstone Geography
Abstract
In the Pacific Northwest, recent research of obsidian artifacts has suggested that the distance from an obsidian source and the number of sources used decreased over time. My research employs an evolutionary archaeology framework that considers the occurrence of obsidian sources across 656 obsidian artifacts from 18 archaeological sites along the mid-Columbia river in Washington State. To understand prehistoric obsidian occurrence, it is necessary to study stone tool manufacture and use, source diversity, and source-to-site distances. My research uses a model of stone tool cost and performance. Employing this model allows hypotheses to be tested about changing obsidian occurrence over time. How obsidian was employed in stone tool manufacture, maintenance, and use was described using paradigmatic classification. To understand how these stone tool attributes related to obsidian source diversity, a geochemical analysis was employed to trace obsidian artifacts to their geologic source. I chose samples for geochemical sourcing based on artifact type and quality, and included all artifact sizes in an attempt to capture source diversity. Of the 656 artifacts, 653 were assigned to one of 10 sources located in Washington, Oregon, and Idaho. Results indicate three local sources (one high- and two low-quality) comprise 93 percent of the collection, occurring as generally unused bifaces, cores, and flakes. Seven nonlocal, higher-quality sources represent 7 percent of the artifacts as two bifaces and small flakes. Testing our hypothesis demonstrated that local low-quality obsidian occurred as informal tools throughout time, while nonlocal high-quality sources were used for formal tools periodically over time.
Recommended Citation
Kassa, Sonja and McCutcheon, Patrick, "The Archaeology of Obsidian Occurrence Across Stone Tool Manufacture and Use Along the mid-Columbia River, Washington" (2014). Symposium Of University Research and Creative Expression (SOURCE). 100.
https://digitalcommons.cwu.edu/source/2014/posters/100
Poster Number
47
Additional Mentoring Department
Resource Management
The Archaeology of Obsidian Occurrence Across Stone Tool Manufacture and Use Along the mid-Columbia River, Washington
SURC Ballroom C/D
In the Pacific Northwest, recent research of obsidian artifacts has suggested that the distance from an obsidian source and the number of sources used decreased over time. My research employs an evolutionary archaeology framework that considers the occurrence of obsidian sources across 656 obsidian artifacts from 18 archaeological sites along the mid-Columbia river in Washington State. To understand prehistoric obsidian occurrence, it is necessary to study stone tool manufacture and use, source diversity, and source-to-site distances. My research uses a model of stone tool cost and performance. Employing this model allows hypotheses to be tested about changing obsidian occurrence over time. How obsidian was employed in stone tool manufacture, maintenance, and use was described using paradigmatic classification. To understand how these stone tool attributes related to obsidian source diversity, a geochemical analysis was employed to trace obsidian artifacts to their geologic source. I chose samples for geochemical sourcing based on artifact type and quality, and included all artifact sizes in an attempt to capture source diversity. Of the 656 artifacts, 653 were assigned to one of 10 sources located in Washington, Oregon, and Idaho. Results indicate three local sources (one high- and two low-quality) comprise 93 percent of the collection, occurring as generally unused bifaces, cores, and flakes. Seven nonlocal, higher-quality sources represent 7 percent of the artifacts as two bifaces and small flakes. Testing our hypothesis demonstrated that local low-quality obsidian occurred as informal tools throughout time, while nonlocal high-quality sources were used for formal tools periodically over time.
Faculty Mentor(s)
McCutcheon , Patrick