Frontal Cordillera extends in a north-south direction in the province that borders what country on the west?
Frontal Cordillera Frontal Cordillera (Spanish: "Cordillera Frontal" ) is a mountain range in western Argentina that forms part of the Andes. It extends in a north-south direction in the provinces of La Rioja, San Juan and Mendoza. To the west of the Frontal Cordillera lies the Principal Cordillera that makes up the Argentina–Chile border and the continental divide. "Cordillera" means "mountain range" in Spanish.
Cordillera Occidental (Peru) In Peru the Cordillera Occidental is the western branch of the Andes. It bounds to the west with coastal plains or falls directly into the Pacific along cliffed coasts. To the east of Cordillera Occidental lies the Cordillera Central and the Cordillera Oriental of Peru. As with other parts of the Peruvian Andes the Cordillera Occedental bears evidence on the Andean orogeny.