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Roman Stone Masonry: Volcanic Foundations of the Ancient City

Marie Jackson and Fabrizio Marra
American Journal of Archaeology
Vol. 110, No. 3 (Jul., 2006), pp. 403-436
Stable URL: http://www.jstor.org/stable/40024550
Page Count: 36
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Roman Stone Masonry: Volcanic Foundations of the Ancient City
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Abstract

This article provides a geological framework for the study of the cut-stone and concrete masonry of ancient Rome that yields important new insights into the many uses of native volcanic rock--tuffs, pozzolane, and lavas--in the development of Roman architecture. Geological maps and field observations of building stones in exising monuments, along with experimental and petrographic measurements of the physical and material characteristics of the Roman tuffs and travertine, offer a scientific basis for the examination of descriptions of Roman stone construction by Vitruvius. The appendix gives a full geological description of each stone and a gazetteer of extant Roman buildings using that stone. These data form a thorough and precise foundation for tracing the provenance of various volcanic rocks and for appreciating the Romans' empirical understanding of their diverse and distinctive characteristics. Our geological reassessment corrects misconceptions in previous archaeological scholarship that depend on a faulty nomenclature for Roman stone building materials based, in part, on mistranslations of the original Latin terms used by Vitruvius. The updated geological maps included here will make possible accurate studies of the transport of stone from quarries and the economy of urban construction, with a view to documenting the human capacity to transform the landscape of Rome and its surroundings both geomorphologically and architecturally over many centuries. A better understanding of the geological characteristics of Roman stone masonry can guide us in the archaeological preservation of the ancient monuments.

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