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The coast of the Mediterranean provide several remnants of ancient coastal quarries, which are now useful to study sea level change occurring during the last millennia. Millstones quarries were exploited with same quarrying techniques from rocks like beachrocks, sandstones or similar lithologies, were shaped to be suitable to grind olives, seeds and wheat, to produce oil and flour, or to break apart soft rocks. In this study we integrated historical sources, aerial photography, field surveys and palaeo sea-level modelling to investigate a number of millstones quarries with the aim to asses the intervening sea level change that occurred since the quarries were abandoned. We investigated on their chronology, spatial distribution and spatial relationship to the sea-level. Our results indicate that most of these were carved close to sea level between 1.45 ka and 0.25 ka cal BP, but mainly around 0.45 cal ka BP. Despite the uncertainties associated with the chronology in, we found good agreement between their lowest elevation (between 0.33 m and −0.06 m) and the paleo sea-levels, as predicted by the GIA models. [ABSTRACT FROM AUTHOR]

This article aims to illustrate the background behind the maritime trade of Olynthus-type millstones in the eastern Mediterranean region. A look at the distribution of southern Aegean Olynthus millstones, whose provenances were identified by Williams-Thorpe and Thorpe's petrographic analysis, reveals that millstones were not a major import into the southern Levant, where local Olynthus millstones were produced and distributed. They were more frequent in Cyprus, where they were valued locally due to the dearth of stones appropriate for use as millstones. The analysis of Williams-Thorpe and Thorpe also suggests that southern Levantine millstones, in contrast to millstones from earlier and later periods, were not exported to other Mediterranean regions. Shipwreck remains from the eastern Mediterranean, as well as the distribution of commercial Rhodian amphorae, reveal that Rhodian merchants carried wine and millstones from the southern Aegean to Cyprus. The southern Levant, where a number of locally produced Olynthus mills were unearthed, was self-sufficient in millstones. Hence, the Rhodian merchants, who dominated eastern Mediterranean trade, used the southern Aegean millstones as saleable ballast. [ABSTRACT FROM AUTHOR]

Abstract: The petrochemical study of millstones can contribute to improve the archaeological research into reconstruction of ancient communication routes and trade networks. Volcanic rocks are geographically restricted and rather rare in the Mediterranean regions, and during the Roman period Italian volcanoes were important sources of raw materials for millstones, so the task of determining their geological origin is relatively straightforward. The Italian vesicular volcanics most frequently employed for this purpose were: trachytes from Euganean Hills (Veneto), leucite-bearing lavas from the Vulsini Volcanic District (Latium), basic-intermediate leucite-bearing lavas from Somma-Vesuvius (Campania), silica undersaturated lavas from Monte Vulture Volcano (Basilicata), a rhyolitic ignimbrite from Sardinia and basic products from Mount Etna and the island of Pantelleria (Sicily). This paper contains a general outline of the trade network for each volcanic typology used for millstones during the Roman period – updated with data concerning the leucite-bearing lavic items discovered in the archaeological sites of the ancient Cuicul (now Djemila, Algeria) – together with a summary of their petrographic and geochemical features. [Copyright &y& Elsevier]