Gypsum in Malrubí (Avinyó). Series from the rocks of marine origin -down, bluish gray color- to the continental origin ones -top, reddish color- in Berenguer (Avinyó), near to Malrubí stream. Between the bluish grey and the reddish stratums, there is a whitish layer of gypsum that comes from the evaporation of the water of the old eocenic sea.
[photo Florenci Vallès]