{"title":"New Radiocarbon Dates from the Late Paleoindian Cody Complex Component at the Lamb Spring Site, Douglas County, Colorado","authors":"E. Knell, Craig M. Lee","doi":"10.1080/20555563.2020.1762408","DOIUrl":null,"url":null,"abstract":"ABSTRACT Extant collections, such as those from the Lamb Spring site near Denver, Colorado, provide the opportunity to fine-tune existing chronologies through the application of new techniques. Here we present three newly obtained, high precision AMS radiocarbon dates – 9425 ± 20, 9445 ± 25, and 9470 ± 25 radiocarbon years BP (averaging 9443 radiocarbon years BP) – on bison killed by the site’s Cody complex inhabitants. These new dates are older than the previously reported ages from the Cody deposit and provide a more reliable assessment of the component’s age. Dietary stable carbon isotopes obtained on the dated samples suggest the bison kill (or kills) likely occurred during a time when warm-and-dry-tolerant C4 grasses were increasing relative to the previously dominant, cool-weather-tolerant C3 grasses.","PeriodicalId":37319,"journal":{"name":"PaleoAmerica","volume":"6 1","pages":"374 - 378"},"PeriodicalIF":1.6000,"publicationDate":"2020-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/20555563.2020.1762408","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"PaleoAmerica","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1080/20555563.2020.1762408","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ANTHROPOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
ABSTRACT Extant collections, such as those from the Lamb Spring site near Denver, Colorado, provide the opportunity to fine-tune existing chronologies through the application of new techniques. Here we present three newly obtained, high precision AMS radiocarbon dates – 9425 ± 20, 9445 ± 25, and 9470 ± 25 radiocarbon years BP (averaging 9443 radiocarbon years BP) – on bison killed by the site’s Cody complex inhabitants. These new dates are older than the previously reported ages from the Cody deposit and provide a more reliable assessment of the component’s age. Dietary stable carbon isotopes obtained on the dated samples suggest the bison kill (or kills) likely occurred during a time when warm-and-dry-tolerant C4 grasses were increasing relative to the previously dominant, cool-weather-tolerant C3 grasses.
PaleoAmericaEarth and Planetary Sciences-Paleontology
CiteScore
3.70
自引率
0.00%
发文量
15
期刊介绍：
PaleoAmerica disseminates new research results and ideas about early human dispersal and migrations, with a particular focus on the Americas. It fosters an interdisciplinary dialog between archaeologists, geneticists and other scientists investigating the dispersal of modern humans during the late Pleistocene. The journal has three goals: First and foremost, the journal is a vehicle for the presentation of new research results. Second, it includes editorials on special topics written by leaders in the field. Third, the journal solicits essays covering current debates in the field, the state of research in relevant disciplines, and summaries of new research findings in a particular region, for example Beringia, the Eastern Seaboard or the Southern Cone of South America. Although the journal’s focus is the peopling of the Americas, editorials and research essays also highlight the investigation of early human colonization of empty lands in other areas of the world. As techniques are developing so rapidly, work in other regions can be very relevant to the Americas, so the journal will publish research relating to other regions which has relevance to research on the Americas.
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