Catalan Mediterranean System

The Catalan Mediterranean System, also known as Mediterranean System, Transversal Ibero-Pyrenaean System, and Catalanid System, 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.

Geology
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:
 * Northern Zone, between the Empordà comarca and the Llobregat. This zone is of paleozoic and crystalline composition
 * Central Zone, between rivers Llobregat and Ebre
 * Southern Zone, between the Baix Ebre comarca and the Millars River in the Valencian Community. Both the central and the southern zone are of mesozoic and tertiary composition.