Late Pleistocene and Early Holocene Obsidian in Alberta and Human Dispersal into North America’s Ice-Free Corridor

IF 1.6 Q1 ANTHROPOLOGY PaleoAmerica Pub Date : 2023-08-10 DOI:10.1080/20555563.2023.2243133
Todd J. Kristensen, Timothy E. Allan, J. Ives, R. Woywitka, G. Yanicki, J. Rasic
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Abstract

ABSTRACT We utilize pXRF to source the oldest obsidian artifacts in Alberta, Canada. The province lacks obsidian outcrops and hosts much of the late Pleistocene Ice-Free Corridor, the northern and southern ends of which are in proximity to obsidian outcrops in Yukon, Alaska, Idaho, and Wyoming. The early presence of these obsidians in Alberta informs models of human dispersion. Results point to an early establishment of relationships in the central Ice-Free Corridor that reached into Oregon, Idaho, and Alaska. Alberta appears to have been entered by people from the south who had ties to the Pacific Northwest and Intermountain West. After biotic viability of a full Corridor, limited evidence suggests that northern people from Beringia may have trickled south and admixed with southern populations in the central Corridor region. Upon deglaciation of access routes through the Rocky Mountains, obsidian from western sources in British Columbia arrived relatively quickly in northern Alberta.
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阿尔伯塔省晚更新世和全新世早期黑云母与人类进入北美无冰走廊
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来源期刊
PaleoAmerica
PaleoAmerica Earth 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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