Results 141 to 150 of about 2,512 (190)

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
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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

A New Obsidian Source in the Highlands of Guatemala

Ancient Mesoamerica, 1992
AbstractA new obsidian source has recently been discovered in the highlands of Guatemala, near the city of Sansare, El Progreso. Ten samples have been subjected to neutron activation analysis, and the results are presented. While ceramic affinities tie the Sansare area with Formative and Classic period Highland Maya sites, linguistic evidence suggests ...
Geoffrey E. Braswell, Michael D. Glascock   +1 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

Obsidian Sources in Guatemala: A Regional Approach

American Antiquity, 1978
Geologic sources of obsidian are frequently treated in the archaeological literature as single, discrete flows, each being recognized as a different source as long as it can be geographically isolated. However, some recent studies show a tendency toward the correction of this misconception, and toward defining operationally the obsidian source concept ...
Luis Hurtado de Mendoza, William A. Jester   +1 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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The prehistoric sources of Palliser Bay obsidian

Journal of Archaeological Science, 1978
Abstract A sample of 210 pieces of archaeologically derived obsidian from settlement sites in Palliser Bay, New Zealand, was subjected to X-ray fluorescent analysis, in order to define the petrographic sources exploited by these prehistoric groups. It was found that the material had been derived from sources at Mayor Island, Huruiki, Rotorua, Cooks ...
B.F. Leach, A.J. Anderson
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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

The loneliness of an obsidian source in southwest Manus

Archaeology in Oceania, 1997
AbstractOf two obsidian source areas in the Admiralty Islands (Manus Province, Papua New Guinea), only the Lou‐Pam Islands source has a well‐established place in archaeological distributions both local and regional. From the other source area in southwest Manus Island, many sites have been recorded following their exposure by bulldozers.
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