Article

The Late Pleistocene dispersal of modern humans in the Americas

Center for the Study of the First Americans, Department of Anthropology, Texas A&M University, 4352 TAMU, College Station, TX 77843-4352, USA.
Science (Impact Factor: 31.48). 04/2008; 319(5869):1497-502. DOI: 10.1126/science.1153569
Source: PubMed

ABSTRACT When did humans colonize the Americas? From where did they come and what routes did they take? These questions have gripped scientists for decades, but until recently answers have proven difficult to find. Current genetic evidence implies dispersal from a single Siberian population toward the Bering Land Bridge no earlier than about 30,000 years ago (and possibly after 22,000 years ago), then migration from Beringia to the Americas sometime after 16,500 years ago. The archaeological records of Siberia and Beringia generally support these findings, as do archaeological sites in North and South America dating to as early as 15,000 years ago. If this is the time of colonization, geological data from western Canada suggest that humans dispersed along the recently deglaciated Pacific coastline.

3 Followers
 · 
252 Views
  • Journal of Field Archaeology 02/2015; 40(1):69-88. DOI:10.1179/0093469014Z.000000000106
  • [Show abstract] [Hide abstract]
    ABSTRACT: The conservation of biological diversity is closely linked with the fate of the world’s cities. While the protection of sensitive and threatened species and habitats has often taken place in natural landscapes largely devoid of people, strategies for preserving the Earth’s biodiversity that can be employed within cities are likely to become more common as urban areas continue to increase in size and number. Progress towards the development of effective conservation methods for working in urban areas is impeded by several factors, including the unfamiliarity that many conservation scientists have with urban landscapes, and the need to identify and incorporate elements of an urban area’s distinctiveness into biodiversity conservation projects. Even cities of the same size differ significantly in terms of their bio/geo/ecological realm or “natural” environment, their human communities, and their built environment, and these differences matter for the development of urban conservation strategies. Conservation practitioners can effectively incorporate information about these differences into their implementation efforts by: using a robust adaptive management framework that allows for an iterative approach in the development of strategies, employing the ecosystems concept when working in project areas that include urban spaces, incorporating pre-existing socioeconomic data into urban conservation planning, and harnessing technological and other resources readily available within urban areas to meet the needs of biodiversity conservation practitioners.
    Biodiversity and Conservation 03/2014; 24(3):683-700. DOI:10.1007/s10531-014-0832-1 · 2.07 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: This paper presents results of investigation of an early archaeological site in Uruguay, and considers its position on a regional scale. Pay Paso 1 is the first early site of Uruguay to yield both artifacts and faunal remains including records of Pleistocene fauna (Equus sp. and Glyptodon sp.) in a radiocarbon-dated stratigraphic context. From stratigraphic, chronological and archaeological observations, three cultural components for the Pleistocene-Holocene transition have been identified, together representing one of the most intensively AMS dated sites in South America. This solid chronological base allows the positioning of the peopling of Uruguay in the context of the early settlement of the surrounding region including northeastern Argentina and southern Brazil. The site is also remarkable because it yielded evidence of a blade technology at 12,802 cal yr BP, with numerous blades and a depleted blade core, which, together with the records from Laguna Canosa and K87 (Arroyo del Tigre), permit the definition of the Tigre and Pay Paso Paleoamerican cultural complexes. Tigre and Pay Paso bifacial points were produced in post- Fishtail times in the Low Plains, a vast open territory in Uruguay and southern Brazil.

Full-text (2 Sources)

Download
40 Downloads
Available from
Jun 3, 2014