New Approaches to the Characterization of Obsidian from the Mediterranean Island Sources: Interpreting Chronological Cha

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lino di Varese

Les Terres Blanches Gaione

San Polo Fornace Cappuccini

Arene Candide

Combes Ste. Catherine

Giribaldi La Cabre Lumaca Pietracorbara Strette Monte Grosso

Basi

Casa Querciolaia Paduletto di Castagneto Susac

Pianosa

La Marmotta

I Calanchi

Grotta Sa Corona

Santo Stefano Casale del Dolce Passo di Corvo

Grotta Filiestru

Palmarola

Molia Cuccuru s'Arriu

Mt. Arci

Su Carroppu

Acconia Grotta dell'Uzzo

Lipari Bova Marina

Zembra Pantelleria Skorba

250 Km

Figure 1. Central Mediterranean obsidian sources and Neolithic archaeological sites with ten or more analyzed obsidian artifacts. Reduction Modification

Production Use

Re-use

Deposition Acquisition (Extraction) Transport Exchange

Figure 2. The chain of events that may be represented by obsidian artifacts found at archaeological sites.

the establishment of an agricultural way of life, division of labor and craft specialization, and the emergence of increasingly complex societies. Obsidian provenance studies in the Mediterranean and Near East have a long history [2-4], but until recently the field investigation, detailed documentation, characterization analysis and publication of all of the obsidian sources was incomplete [5-6]. Significantly, the obsidian from each island has been treated by most archaeologists as deriving from a single source when in fact it occurs as multiple primary outcrops and secondary deposits. Furthermore, until a decade ago, very few provenience studies resulted in the analysis of ten or more obsidian artifacts from dated contexts at a single archaeological site [7-11], preventing the comparison of source exploitation patterns in a statistically meaningful way [12]. Early analyses of artifacts made of Sardinian obsidian suggested that multiple, chemically differentiable sources or flows exist on at least that island [3], and field and laboratory research by several teams has now resulted in the location and characterization of as many as nine chemically distinct obsidian source localities in the Monte Arci region, of which at least five were exploited in antiquity [6, 13-17]. Five chemical source groups have also been identified for Pantelleria [18]; obsidian occurs in two separate localities on Palmarola [19]; and multiple outcrops exist on Lipari as well [20]. A comprehensive geoarchaeological and geochemical investigation of these three islands has recently been undertaken by this author, and will result in a comprehensive detailed database for all central Mediterranean obsidian sources. This is critically necessary to support the emphasis of recent obsidian studies on using non- or minimally destructive techniques to analyze large numbers of artifacts or even entire assemblages from good archaeological contexts, and to attribute them to specific flows and outcrops [5, 21]. By doing so, it is possible to demonstrate real temporal and spatial patterns in source exploitation, and to postulate explanations for different patterns in terms of accessibility, quantity, quality, and appearance of the raw material, as w