POUPEAU, Gérard; KIEFFER, Guy; RAYNAL, Jean-Paul; MILTON, Andy; DELERUE, Sarah

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

POUPEAU, Gérard
Institut de Recherches sur les Archéomatériaux [IRAMAT]

KIEFFER, Guy
Laboratoire de Géographie Physique et Environnementale [GEOLAB]

RAYNAL, Jean-Paul
De la Préhistoire à l'Actuel : Culture, Environnement et Anthropologie [PACEA]

Langue

Chapitre d'ouvrage

Ce document a été publié dans

Studies on the Early Paleolithic site of Melka Kunture, Ethiopia. Edited by Jean Chavaillon and Marcello Piperno, Studies on the Early Paleolithic site of Melka Kunture, Ethiopia. Edited by Jean Chavaillon and marcello Piperno, Florence. 2004, vol. 1, p. 103-110

Istituto Italiano di Preistoria e Protostoria

Résumé en anglais

The only identified source on the left bank of the Awash River is obsidian of type A (Balchit main lava outcrop). Thus, differences observed among the analysed samples concerning obsidians of types B and C may reflect minor variations among a single source during the emplacement of the lava or refer to unidentified sources upstream or on the left bank basin of the Awash River. Obsidian of type D collected south of the Awash River in Simbiro Creek formations is a grey vitrous fluidal lava with a porphyric microstructure; quartz and feldspar crystals are oriented according to the fluidal structure. This material appears to be an ignimbrite facies which vitreous bedsole rapidly cooled in the contact with the substratum. We have identified several similar ignimbrites in this area. The Balchit obsidian lava and its reworked debris are widely distributed in the paleoenvironment and form a major raw material source for prehistoric artefacts. In the future we may expect to identify more obsidian types in primary and secondary positions and including some flaked by hominids, especially in the southern part of the Melka Kunture area< Réduire

Mots clés en anglais

Obsidienne

Balchit

Haut-Awash

Ethiopie

Obsidian

Upper Awash basin

Ethiopia

ICP-MS

Métadonnées

Partager cette publication !

Licence d’utilisation du document

Trace element geochemistry in Balchit obsidian (Upper Awash, Ethiopia)

Langue

Ce document a été publié dans

Résumé en anglais

Mots clés en anglais

URI

Origine

Unités de recherche