Tempestitas en el Subbético medio (Fm. Milanos, Jurásico superior). Sus características y facies relacionadas

Abstract

We have recognized and analysed tempestites, made up by calcisiltites and calcarenites with chert and hummocky cross-stratification (HCS), in the Milanos Fm (Upper Jurassic) of the Middle Subbetic (Betic Cordillera). The most characteristic calcareous tempestite levels are packstone and grainstone (more rarely wackestone) with peloids and bioclasts. They have a thickness between 25 to 75 cm and a distinctive elemental sequence. The presence of these tempestite levels is a fundamental new argument to interpret these deposits as characteristics of the deeper parts of a platform or carbonate outer ramp, less than 200 m in depth