The discovery of a Pleistocene fauna in karstic fills at Tam Hang in Laos: preliminary results

Tam Hang, located in northeastern Laos, in the Hua Pan province, is a reference site not only for its numerous archaeological and human remains, but also for its two faunal assemblages, whose composition suggests different dating in the Pleistocene. Discovered in 1934 by Jacques Fromaget, a new exca...

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Published inComptes rendus. Palevol Vol. 7; no. 5; pp. 277 - 288
Main Authors Bacon, A M, Demeter, F, Tougard, de Vos, J, Sayavongkhamdy, T, Antoine, PO, Bouasisengpaseuth, B, Sichanthongtip, P
Format Journal Article
LanguageFrench
Published 01.01.2008
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Summary:Tam Hang, located in northeastern Laos, in the Hua Pan province, is a reference site not only for its numerous archaeological and human remains, but also for its two faunal assemblages, whose composition suggests different dating in the Pleistocene. Discovered in 1934 by Jacques Fromaget, a new excavation of the site has been undertaken in 2003. During this campaign, at Tam Hang south, 575 isolated teeth of mammals were extracted from a deep layer of calcareous breccia. This assemblage corresponds to that one described by Arambourg and Fromaget [C. Arambourg, J. Fromaget, Le gisement quaternaire de Tam Nang (Chaine Annamitique septentrionale). Sa stratigraphie et ses faunes, C. R. Acad. Sci. Paris 203 (1938) 793-795.], as characterized by the presence of Ursus premalayanus, and the rarity of Pongo pygmaeus. Systematics and analysis of teeth show that this new assemblage is composed of archaic subspecies, characteristic of the Middle Pleistocene. The faunal composition suggests ecological conditions also found in other Pleistocene sites of the South-East-Asia mainland area. Finally, the analysis of the process of preservation and deposition enables a brief description of the taphonomy specific of karstic systems.Original Abstract: Tam Hang, localise dans le Nord-Est du Laos, dans la province de Hua Pan, est un site de reference, non seulement pour ses nombreux vestiges archeologiques et humains, mais aussi pour ses deux assemblages fauniques, dont le contenu suggere des ages differents dans le Pleistocene. Decouvert en 1934 par Jacques Fromaget, son exploitation a ete reprise en 2003. Lors de cette nouvelle campagne, nous avons extrait de l'epaisse couche de breche calcaire qui affleurait massivement a Tam Hang sud, 575 dents isolees de mammiferes. Cet assemblage correspond a celui qu'Arambourg et Fromaget [C. Arambourg, J. Fromaget, Le gisement quaternaire de Tam Nang (Chaine Annamitique septentrionale). Sa stratigraphie et ses faunes, C. R. Acad. Sci. Paris 203 (1938) 793-795.] caracterisent par la presence d'Ursus premalayanus et par la rarete de Pongo pygmaeus. La determination systematique et l'analyse des dents montrent que cet assemblage comprend plusieurs sous-especes archaiques, typiques du Pleistocene moyen. La composition de la faune suggere des conditions ecologiques que l'on retrouve egalement dans les autres sites pleistocenes d'Asie du Sud-Est continentale. Enfin, l'analyse des processus de conservation et de depot permet de rappeler brievement quels sont les facteurs taphonomiques specifiques des milieux karstiques.
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ISSN:1631-0683
DOI:10.1016/j.crpv.2008.03.009