Catalan Mediterranean System

Ggeographical region in Catalonia

Geomorphologic map of Catalonia (The green Southern Zone extends 80 km further south into the Valencian community):   Pyrenees
  Pre-Pyrenees
  Catalan Central Depression
  Smaller mountain ranges of the Central Depression
  Catalan Transversal Range
  Catalan Pre-Coastal Range
  Catalan Coastal Range
  Catalan Coastal Depression and other coastal and pre-coastal plains

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.

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.