Stratigraphy and Geochronology of La Playa Archaeological Site, Sonora, Mexico

Persistent Link:
http://hdl.handle.net/10150/229791
Title:
Stratigraphy and Geochronology of La Playa Archaeological Site, Sonora, Mexico
Author:
Copeland, Audrey Elizabeth; Quade, Jay; Watson, James; McLaurin, Brett; Villalpando, Elisa
Issue Date:
May-2011
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
The current study examines the stratigraphy, geochronology, and paleoecology of La Playa, an Early Agricultural period archaeological site (3600-1800 BP) located in northern Sonora, Mexico. We distinguished seven stratigraphic units ranging in age from >44,570 to 680 cal yr BP. All of the cultural remains are contained in Unit B, which spans from 4700-1580 BP. Deposits from Unit B represent overbank deposition from the nearby Rio Boquillas. The majority of cultural materials come from Units B4 and B5, which correspond to the Cienega phase (2800-1800 BP) of the Early Agricultural period. This period coincides with the first sedentary agricultural populations in the region and is marked by thousands of archaeological features including roasting pits, human burials, and extensive canal systems at La Playa. The presence of semi-aquatic and aquatic snails demonstrates that water was present year round in the canal system. The stable and radiometric isotopic evidence suggests that the early agriculturalists diverted ground water, likely from the nearby Rio Boquillas. Cultural remains from Unit C spanning the period <1580-680 BP are rare, suggesting major population decline during this time. There is little to no evidence of bioturbation in Unit C, suggesting that the landscape was thinly vegetated at this time. La Playa has experienced up to five meters of erosion during historic times, exposing a complex alluvial stratigraphy and numerous cultural features, which has greatly complicated archaeological interpretations at the site.
Type:
text; Electronic Thesis
Degree Name:
B.S.
Degree Level:
bachelors
Degree Program:
Honors College; Anthropology
Degree Grantor:
University of Arizona

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleStratigraphy and Geochronology of La Playa Archaeological Site, Sonora, Mexicoen_US
dc.creatorCopeland, Audrey Elizabethen_US
dc.contributor.authorCopeland, Audrey Elizabethen_US
dc.contributor.authorQuade, Jayen_US
dc.contributor.authorWatson, Jamesen_US
dc.contributor.authorMcLaurin, Bretten_US
dc.contributor.authorVillalpando, Elisaen_US
dc.date.issued2011-05-
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractThe current study examines the stratigraphy, geochronology, and paleoecology of La Playa, an Early Agricultural period archaeological site (3600-1800 BP) located in northern Sonora, Mexico. We distinguished seven stratigraphic units ranging in age from >44,570 to 680 cal yr BP. All of the cultural remains are contained in Unit B, which spans from 4700-1580 BP. Deposits from Unit B represent overbank deposition from the nearby Rio Boquillas. The majority of cultural materials come from Units B4 and B5, which correspond to the Cienega phase (2800-1800 BP) of the Early Agricultural period. This period coincides with the first sedentary agricultural populations in the region and is marked by thousands of archaeological features including roasting pits, human burials, and extensive canal systems at La Playa. The presence of semi-aquatic and aquatic snails demonstrates that water was present year round in the canal system. The stable and radiometric isotopic evidence suggests that the early agriculturalists diverted ground water, likely from the nearby Rio Boquillas. Cultural remains from Unit C spanning the period <1580-680 BP are rare, suggesting major population decline during this time. There is little to no evidence of bioturbation in Unit C, suggesting that the landscape was thinly vegetated at this time. La Playa has experienced up to five meters of erosion during historic times, exposing a complex alluvial stratigraphy and numerous cultural features, which has greatly complicated archaeological interpretations at the site.en_US
dc.typetexten_US
dc.typeElectronic Thesisen_US
thesis.degree.nameB.S.en_US
thesis.degree.levelbachelorsen_US
thesis.degree.disciplineHonors Collegeen_US
thesis.degree.disciplineAnthropologyen_US
thesis.degree.grantorUniversity of Arizonaen_US
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