Context, Provenance and Technology of a Western Stemmed Tradition Artifact Cache from the Cooper's Ferry Site, Idaho Public Deposited

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  • The discovery of an artifact cache containing Western Stemmed Tradition projectile points in a clearly defined pit feature at the Cooper’s Ferry site offers a unique perspective on early lithic technology and logistical organization in western North America. A description and analysis of the cache feature reveals several new insights, including: a rocky cairn capped the surface of the pit feature; some of the artifacts were made from cryptocrystalline silicates found 16 km away; debitage analysis, including aggregate and attribute based measures, identified two distinct lithic reduction stages present in the cache; new radiocarbon assays suggest that the cache is probably not early Holocene in age and may date to associated radiocarbon age estimates of 11,370-11,410 B.P. Unlike Clovis caches, the Pit Feature A2 cache at Cooper’s Ferry appears to be a generalized toolkit that was probably placed at the site for future use. If the 11,370-11,410 B.P. assays date the creation of the Pit Feature A2 cache, then its creators were probably not pioneers in the lower Salmon River canyon but possessed local knowledge about the landscape and raw material sources; these patterns suggest greater time depth for Western Stemmed Tradition foragers.
  • Spanish Abstract: El descubrimiento de un depósito de artefactos conteniendo puntas de proyectil en la Tradición de Tallo Occidental (Western Stemmed Tradition) en una fosa claramente definida, en el sitio de Cooper’s Ferry, ofrece una perspectiva única sobre la tecnología lítica temprana y organización logística en el Occidente de América del Norte. La descripción y el análisis de este depósito revela nuevas manifestaciones, incluyendo: el uso de un cumulo rocoso que cubrió la superficie de la fosa; algunos de los artefactos fueron hechos de silicatos criptocristalinos que se encuentran a 16 km de distancia; análisis de los desechos de talla, incluyendo las medidas basadas en agregados y sus atributos, identificaron dos distintas etapas de reducción lítica presentes en el acopio. Nuevas fechas por radiocarbono indican que este depósito probablemente no corresponde al Holoceno temprano en antigüedad y bien puede datar a fechas por radiocarbono de entre 11,370-11,410 años AP. A diferencia de depósitos Clovis, el de la fosa A2 en Cooper’s Ferry, parece ser un conjunto de herramientas de uso general que probablemente fue colocado en el sitio para su uso a futuro. Si las fechas 11,370- 11,410 AP datan la creación del depósito en la fosa A2, entonces los autores probablemente no fueron pioneros en las bajas inmediaciones del cañón del río Salmón (Salmon River canyon), pero poseían un conocimiento particular acerca del paisaje y fuentes de materia primas locales; estos patrones sugieren una mayor antigüedad para los grupos recolectores de la Tradición de Tallo Occidental.
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  • Davis, L. G., Nyers, A. J., & Willis, S. C. (2014). Context, Provenance and Technology of a Western Stemmed Tradition Artifact Cache from the Cooper's Ferry Site, Idaho. American Antiquity, 79(4), 596-632. doi:10.7183/0002-7316.79.4.596
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  • description.provenance : Approved for entry into archive by Deanne Bruner(deanne.bruner@oregonstate.edu) on 2015-02-23T20:40:40Z (GMT) No. of bitstreams: 1 DavisLorenAnthropologyContextProvenanceTechnology.pdf: 1867982 bytes, checksum: 9937cd4dd6dd9f6b568d81d31e1a8841 (MD5)
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