The Catalan Mediterranean System, also known as Mediterranean System, Transversal Ibero-Pyrenaean System, and Catalanid System,[1] is a wide coastal geographical region in Catalonia. It is made up of a double system of coastal mountain chains: The Catalan Coastal Range and the Catalan Pre-Coastal Range, as well as the Catalan Coastal Depression and other coastal and pre-coastal plains located among those mountain ranges.
Geologically the Catalan Mediterranean System is the result of a tectonic uplift, about 300 km long and roughly 50 km wide.
Transversally the system can be divided in three zones: