HR: 0800h
AN: GP21A-0006    [Abstracts]
TI: Archaeomagnetic Study of an Italian Roman Amphorae Workshop
AU: * Hill, M J
EM: mimi@liv.ac.uk
AF: CNRS, UMR 6566 'Civilisation Atlantique et Archeosciences', Universite Rennes 1, Rennes, 35042 France
AU: Lanos, P
EM: philippe.lanos@univ-rennes1.fr
AF: CNRS, UMR 6566 'Civilisation Atlantique et Archeosciences', Universite Rennes 1, Rennes, 35042 France
AU: Chauvin, A
EM: annick.chauvin@univ-rennes1.fr
AF: CNRS, UMR 6118 'Geosciences Rennes', Universite Rennes 1, Rennes, 35042 France
AB: The amount of Italian archaeomagnetic data from archaeological material is limited. However, whilst directional data is steadily increasing there is practically no corresponding intensity data. Five kilns and a set of 39 stamped amphorae from a Roman Amphorae workshop at Albinia, Italy have been sampled for a high resolution archaeomagnetic investigation. The types of amphorae found at the workshop date the site to being between 200 and 0 BC. Rock magnetic, directional, and archaeointensity experiments (including anisotropy of TRM and cooling rate correction) have been carried out to allow determination of the complete geomagnetic field vector. Four of the five kilns give indistinguishable directions, with one kiln having a slightly higher inclination. Extremely high quality archaeointensity data have been obtained with 123 out of 124 determinations proving successful. For the kilns, the standard deviation about the mean varies between 3 and 8 % (with the number of samples per kiln being between 8 and 24), and for the set of 39 amphorae the standard deviation about the mean is 5 %. After correcting for cooling rate (comparing remanence acquired after 1.5 hours and 24 hours in the laboratory) the standard deviation about the mean does not significantly change. The mean archaeointensity (for each kiln and the amphorae) with cooling rate correction ranges from 62 to 70 microT (the maximum and minimum archaeointensities do not correspond to the kiln with the higher inclination). Reasons for the dispersion seen between kilns are discussed and results compared to the French and Bulgarian secular variation curves and the CALS7K.2 global model.
DE: 1500 GEOMAGNETISM AND PALEOMAGNETISM
DE: 1503 Archeomagnetism
DE: 1521 Paleointensity
DE: 1560 Time variations: secular and longer
SC: Geomagnetism and Paleomagnetism [GP]
MN: Fall Meeting 2005