Kaolin and sericite clays from SW Spain: particle size distribution, mineralogical and ceramic study

2 pages, 1 table, 5 references.-- Aparece en la serie Mineralogica et Petrographica Acta volume XXIX-A.-- Congreso celebrado del 24-28, septiembre, 1984, en Seiano di Vico Equense y Amalfi, Italia.
Nine samples of natural clays with high aluminium contents, from different southwestern Spanish deposits, mainly used in the ceramic industry were studied. The deposits from Sta. Eufemia (Córdoba) and Garlitos (Badajoz) are formed by ampelitic Ordovician-Silurian materials, while the ones from Zalamea and Monterrubio de la Serena (Badajoz), which have similar characteristics, are Lower-pevonian in age. However, all the deposits show a very low-grade metamorphism, and there are sorne break networks formed by the Hercynian Orogeny which enabled the fluids to flow.