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The thermal behaviour, mineralogy, texture and micro-structure of the original rocks used as raw materials in the manufacture of ceramics of the potter community in Fran Ali (Oued Laou, Tetouan, Morocco) were studied. The original rocks of the alteration deposit are metapelites and altered philites from the Units Malaguide-Gomáride in the Baetic-Rifian mountain system. The techniques used by local potters and the water used to prepare the ceramic bodies were also studied. Original rocks are metapelites or filadios and raw materials belong to levels caused by exogenous or supergene alteration (quartz-illite and chlorite type clays). The ceramics studied by microscopy exhibit anisotropy.Se ha estudiado el comportamiento térmico, la mineralogía, la textura y la microestructura de las materias primas empleadas en la elaboración de las cerámicas de la comunidad alfarera de Fran Ali (Oued Laou, Tetuán, Marruecos). Las rocas originarias de los distintos afloramientos proceden de Unidades Malaguide-Gomárides de la cadena alpina Bético-Rifeña también se estudiaron. Se detalla la técnica empleada por los ceramistas de esta zona para la elaboración de las piezas. Se analizó el agua empleada para la preparación de la pasta. Las rocas originarias son metapelitas o filadios y las materias primas pertenecen a niveles originados por alteración supergénica o exógena (arcillas de tipo cuarzo-illiticas y cloríticas). Las cerámicas estudiadas al microscopio presentan anisotropía.

This paper is part of research project on the ceramics of Ategua, a village located in the Guadalquivir depression near Cordoba (S. Spain). Ategua is a major archaeological deposit with pre-Roman (pre-colonial, Tartessian and Iberian) ruins that are highly rich in ceramic pieces. This work was conducted on 20 selected pieces found in various archaeological layers spanning the following phases in the period from 900 to 350 B.C. ( i.e. the beginning of the Roman republic): (a) Phase I: pre-colonial Bronze age, from 900 to 859 B.C. in a pre-colonial necropolis. (b) Phases II–IV: western-style and Final Bronze age, from 750 to 550 B.C. In order to identify the origin of ceramics and the different types of materials used to produce the ceramic pieces studied, we used various techniques including: X-ray diffraction, scanning electron microscopy with EDS microanalysis and petrographic microscopy (thin section). The materials identified in most of the ceramic pieces from the archaeological phases studied were similar and also present in the geological environment, which supports an autochthonous origin. The presence of metamorphic rock clase, amphiboles and small content of TiO 2 in some of the ceramic simples could suggest its allocthonous origenorigin. This paper reports the first mineral and petrographic data on pre-Roman ceramics from Ategua.

This study consisted in characterizing the materials used to build Santa Marina de Aguas Santas Church at Cordoba and locating the original quarries. The techniques used in the lithological and chemical characterization included XRD, petrographic microscopy and electron dispersive scanning microscopy. The chemical index of weathering (CIW) was used to quantify the state of stone decay. The lithology and different types of alterations observed were mapped. A comparison of the material on the building to ancient quarries identified “Naranjo” as the possible site where the stone was originally quarried., Para la caracterización litológica y determinación del grado de alteración de los materiales pétreos se han empleado las siguientes técnicas: difracción de rayos X (método del polvo), microscopía petrográfica (sobre lámina delgada) y microscopía de barrido con EDS (energía dispersiva de rayos X), para determinar la composición química. El estado de degradación del material pétreo se ha cuantificado a partir del índice químico de alteración (CIW). Se han realizado cartografías sobre la fachada oeste: a) de las litologías presentes y b) de los diferentes tipos de alteración observados. La comparación de muestras del edificio con las de antiguas canteras ha permitido identificar la del Naranjo como la posible cantera de origen.