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Archaeological implications of the geology and chronology of the Soa basin, Flores, Indonesia

¹ Department of Earth Sciences, Syracuse University, Syracuse, New York 13244, USA
² Archaeology and Palaeoanthropology, University of New England, Armidole, New South Wales 2351, Australia
³ Geological Research and Development Centre, Bandung 40112, Indonesia
⁴ Marine Geological Institute, Bandung 40174, Indonesia
⁵ School of Earth Sciences, University of Melbourne, Melbourne, Victoria 3010, Australia
⁶ School of Earth Sciences, La Trobe University, Bundoora, Victoria 3083, Australia

The timing of arrival of early hominids in Southeast Asia has major implications for models of hominid evolution. The majority of evidence for the earliest appearance of hominids in the region has previously come from Java in western Indonesia. Much of this evidence remains controversial owing to a poor understanding of the stratigraphic and chronologic relationships of the depositional units from which the material was derived. Before artifacts may be placed into their proper archaeological context, the geologic history of archaeological sites must be thoroughly understood, and deposits containing artifacts must be properly dated. An extensive investigation has been undertaken on the island of Flores, in eastern Indonesia, to determine the depositional and chronological history of stratigraphic units within the Soa basin; many of the units are associated with stone artifacts attributed to Homo erectus. Zircon fission-track dates of tuffaceous deposits within this lacustrine basin now provide the most reliable data concerning the true time of arrival of Homo erectus into Southeast Asia and indicate that these early hominids must have successfully begun colonizing eastern Indonesia by ca. 840 ka.

Key Words: fission-track dating • Indonesia • Homo erectus • stratigraphy • basin analysis • geologic mapping

This article has been cited by other articles:

				T. Tagami and P. B. O'Sullivan Fundamentals of Fission-Track Thermochronology Reviews in Mineralogy and Geochemistry, January 1, 2005; 58(1): 19 - 47. [Full Text] [PDF]