Grey and black limestones and calcarenites creams. Neritic and brackish.
Yellow marls and calcareous dolomite loams. Pelagic. Cretaceous.
Black dolomites, Jurassic
Sant Pere de Ribes - Sitges Geological
The geological history of the Sant Pere de Ribes basin
The deeper substratum has a base of slates and Paleozoic granites (400 MA) which
became coated with Mesozoic marine sediments (5/6/7) (between 248 and 65 MA).
Subsidence and cracking in these materials caused a block to
collapse creating the Sant Pere de Ribes depression. This became flooded, and
sedimentary materials (2) accumulated in a Miocene sea (about 23 million years -
MA). This was finally covered by new Quaternary deposits (1) (under 2 MA).
River erosion has been continuously reshaping this structure,
revealing the ancient Mesozoic rocks beneath.