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Caractérisations et indexations des variétés des pierres meulières : de l’étude pétrographique à la définition des types simplifiés au sein d’une base de données géoréférencées

Abstract : The large diversity of querns and millstones in France and adjacent countries in different chronological periods poses problems to characterisation, identification and indexing for databases and reference sources. It is generally very difficult to fulfil both the expectations and requirements of millstone specialists, geologists, archaeologists or geomatics when attempting to design accurate petrological portraits, petrographical classifications and geochemical analyses. This task becomes even more complex when there is a wide variability within the facies of certain rocks. Furthermore, while certain simplifications can be a source of confusion, other descriptions can be too precise and complex. The process becomes even more cumbersome when the analyses are recorded in a database with a limited number of fields or when attempting to correlated specific rocks to their sources. The issues and problems related to the different approaches to recording data are presented in this paper, notably through the description of different methods of characterising archaeomaterials. Several examples of distribution maps deriving from broad categories or types of millstones of the database are also presented. These reveal the benefits and drawbacks of the method applied to the rotary millstone database stemming from the research project "The typological and technological development of millstones from the Neolithic to the Year One Thousand".
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Gilles Fronteau, Francois Boyer, Olivier Buchsenschutz, Stéphanie Lepareux-Couturier, Caroline Hamon, et al.. Caractérisations et indexations des variétés des pierres meulières : de l’étude pétrographique à la définition des types simplifiés au sein d’une base de données géoréférencées. Buchsenschutz, Olivier; Lepareux-Couturier, Stéphanie; Fronteau, Gilles. Les Meules du Néolithique à l’époque médiévale : technique, culture, diffusion. Actes du 2ème colloque du Groupe Meule, Reims, du 15 au 17 mai 2014, Société archéologique de l'Est; ARTEHIS Éditions, pp.165-173, 2017, Revue archéologique de l'Est, supplément, 2-915544-37-9. ⟨hal-01825462⟩

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