How do the Rif Mountains differ from the Atlas Mountains?

The Rif and Atlas mountains are the two primary mountain systems in Morocco, differing significantly in their geography, geological origins, and structural roles.1

Geographical and Structural Differences

• Location and Orientation: The Rif Mountains form a crescent-shaped arc along the northern Mediterranean coastline, extending from Tangier to the Moulouya River. In contrast, the Atlas Mountains create a massive barrier across the center of the country, running southwest to northeast.12
• Geological Origins: While both ranges formed through the folding and uplifting of sediment from the ancient Tethys Sea, the Rif is geologically distinct as part of the cordilleras that extend southward from the Iberian Peninsula of Europe. The Atlas system is more complex, comprising different structural regions including the young, folded Tell Atlas and the ancient base rock of the Saharan Atlas.123
• Elevation: The Atlas Mountains reach significantly higher altitudes, with Mount Toubkal peaking at 13,665 feet (4,165 meters). The Rif is lower, with its highest point, Mount Tidirhine, reaching 8,058 feet (2,456 meters).412