Rocas volcanoclasticas submarinas de edad burdigaliense inferior en el sector del Mencal (Zona Subbetica, Cordillera Betica central). Contexto sedimentario y tectonico

Abstract

This paper discuss the petrologic features of volcaniclastic rocks and their geodynamic implications. The rocks are included in the pelagic marine sediments of lower Burdigalian from the Rio Fardes region. There are two different kinds of volcaniclastic rocks: vitric and feldspathic sandstones, and vitric siltstones. These rocks contain planktonic foraminifera that indicate volcanism occurring in a submarine environment. The emission focus is placed close to the present-day location of these rocks. During lower Burdigalian several N70°E strike-slip faults was working simultanously with the pelagic marine sedimentation. In this paper it is assumed that these faults are connected with the volcanic activity. -from English summary