Petrographic markers for archaeometric identification of montjuïc sandstone, the flagship stone of Barcelona (NE Spain)
Casas Duocastella, Lluís (Universitat Autònoma de Barcelona. Departament de Geologia)
Di Febo, Roberta (Universitat Autònoma de Barcelona. Departament de Ciències de l'Antiguitat i de l'Edat Mitjana)
Parcerisa i Duocastella, David (Universitat Politècnica de Catalunya. Departament d'Enginyeria Minera, Industrial i TIC)

Data:	2020
Resum:	The present study deals with a particular clastic rock from the Montjuïc hill exploited since Roman times in Barcino (present-day Barcelona (NE Spain)). Polarized and cathodoluminescence microscopies have been used to describe the main petrographic features of Montjuïc sandstones. Several characteristic provenance markers have been identified; among them the most specifically restricted to Montjuïc sandstone are the K-feldspar clasts with authigenic overgrowths. A petrographic survey oriented to the detection of such markers has been fruitfully applied to sculptures, architectural elements, mosaics, and pottery. The petrographic approach has demonstrated that some Roman heritage materials had been erroneously assigned to Montjuïc sandstone and the revision of all the pieces macroscopically assigned to this provenance is advised. The use of Montjuïc sandstone in Roman tesserae has been reported for the first time with interesting implications on previously unreported evidence of Roman extraction at the bottom part of the Montjuïc cliff. Finally, Montjuïc crushed sandstone used as pottery temper has been also reported in the productions of a medieval (12th-13th century) workshop in Barcelona. This encourages the study of the distribution of pottery with this particular temper.
Ajuts:	Ministerio de Economía y Competitividad CGL2013-42167-P
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Archaeometric provenance study ; Petrography ; Sandstone ; Authigenic cement ; Roman period ; Sculpture ; Mosaics ; Temper
Publicat a:	Minerals, Vol. 10, Issue 2 (February 2020) , art. 154, ISSN 2075-163X

DOI: 10.3390/min10020154

24 p, 11.0 MB

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