Results 161 to 170 of about 946 (211)

Obsidian provenance studies in Colombia and Ecuador: obsidian sources revisited

Journal of Archaeological Science, 2008
The field occurrences, elemental compositions and formation ages of Colombian and Ecuadorian obsidians are revisited. It is shown that the regional sources of this raw material are linked to two major volcanic structures: the Chacana and the Paletara calderas, localised on the eastern cordillera of Ecuador and on the central Andean cordillera of south ...
Bellot-Gurlet, Ludovic, Dorighel, Olivier, Poupeau, Gérard   +2 more
openaire   +2 more sources

Obsidian Sources Characterized by Neutron-Activation Analysis

Science, 1968
Concentrations of elements such as manganese, scandium, lanthanum, rubidium, samarium, barium, and zirconium in obsidian samples from different flows show ranges of 1000 percent or more, whereas the variation in element content in obsidian samples from a single flow appears to be less than 40 percent.
A A, Gordus, G A, Wright, J B, Griffin
openaire   +2 more sources

Western Oneota Obsidian: Sources and Implications

Plains Anthropologist, 2001
Exotic lithic raw materials provide insight into exchange relations and mobility of prehistoric populations. Toward this end, obsidian flakes from two western Oneota sites, Warne in north central Kansas and Blood Run in northwestern Iowa, were sourced using x-ray fluorescence spectrometry. With the exception of two artifacts from Warne, all were traced
Brad Logan, Richard E. Hughes, Dale R. Henning   +2 more
openaire   +1 more source

Pacific obsidian sourcing by portable XRF

Archaeology in Oceania, 2010
AbstractThe use of portable XRF analysis to characterise the geochemistry of Pacific obsidians is reported. Obsidian source samples from New Britain, the Admiralties, Fergusson Island and the Banks Islands were successfully characterised and then used to source 966 samples of obsidian from three (SE=SZ‐8, SE‐RF‐2, SE‐RF‐6) Reef/Santa Cruz Lapita sites.
PETER SHEPPARD, BARBARA TRICHEREAU, CRISTANY MILICICH   +2 more
openaire   +1 more source

Splitting obsidian: Assessing a multiproxy approach for sourcing obsidian artifacts in British Columbia

Journal of Archaeological Science: Reports, 2019
Abstract Archaeology and geology inherently intersect when attempting to determine the geographic origin of lithic materials manufactured into artifacts by ancient people. Obsidian, or volcanic glass, is frequently found in archaeological sites, and researchers commonly use the trace element characteristics of obsidian artifacts to identify their ...
Rhy McMillan, Marghaleray Amini, Dominique Weis   +2 more
openaire   +1 more source

Identifying the Geographical Source of Artefact Obsidian

Nature, 1966
DURING an avocational search for means of identifying the geographical source of artefact obsidian, what appears to be a functional tool has been found. It was postulated that, because the concentration ratio in rocks is determined by the origin and age of the rock, it would also ...
GEORGE A. PARKS, THOMAS T. TIEH
openaire   +1 more source

Geochemical composition of source obsidians from Kenya

Journal of Archaeological Science, 2013
Abstract Here we provide a reference resource to archaeologists interested in the sources of obsidian in Kenya, through electron microprobe analyses of 194 obsidian samples from 90 localities. Averaged analyses of each sample and eleven published analyses are categorized into 84 compositional groups of which only about 21 are known to have been used ...
F.H. Brown, B.P. Nash, D.P. Fernandez, H.V. Merrick, R.J. Thomas   +4 more
openaire   +1 more source

Obsidian Source Identification by Fission Track Analysis

Nature, 1971
Fission track analysis has been used to determine the age and uranium content of obsidians from sources in southeast Europe and Anatolia, and from archaeological deposits in mesolithic levels at the Franchthi Cave in southern Greece. It is confirmed that the Franchthi obsidian came from the Aegean island of Melos.
S. A. DURRANI, H. A. KHAN, M. TAJ, COLIN RENFREW   +3 more
openaire   +1 more source

The Italian obsidian sources

2005
In Europe obsidian is a very rare material, in comparison with other sectors of Earth, such as, for example, the adjacent Near East. In Western Europe obsidian workable by prehistoric men was recognised only in four volcanic complexes, located in the IIalian islands of Sardinia, Palmarola, Lipari and Pantelleria.
BIGAZZI G, ODDONE M, RADI, GIOVANNA
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Ancient obsidian sources on Pantelleria (Italy)

Journal of Archaeological Science, 1988
Abstract Neolithic and Late Bronze Age obsidian tools with a sodic peralkaline composition but which are measurably different from those of this chemical type studied previously have been found for the first time in Sicily. Since all these peralkaline obsidians are believed to originate on Pantelleria, this finding poses the problem of the number of ...
openaire   +1 more source