The relief of Mendoza's province is characterized to present mountainous lands in the west and plains in the east. The mountainous atmosphere is represented by the Mountain range of the Andes and the Precordillera. This atmosphere type is developed in the area west and it conforms a third of the surface of the province. One of their characteristics is the one of forming a barrier in front of the humid masses of air coming from the Pacific. It is constituted by formations whose heights go descending from west to this and of north to south.
The mountain fringe understands about 180 Kms. of wide and they form it the main mountain range (to the west) that determines the international limit with Chile, the front mountain range (to the east) and the precordillera. The hill Aconcagua, with a height 6959 meters, the highest in America, is in the main mountain range, since the same one is integrated by mountainous cords with hills of great height. Also the volcanos Tupungato 6800 meters, the Maipo or Maipú 5325 meters are located, the Overo with 4700 meters and the San José with 5780 meters high.
Toward the east it expands the Front mountain range. The same bill with a bigger antiquity that the Main one. It possesses a relief formed by high cords and high blocks that don't conform a chain continuous, presented different geographical accidents. Their extension goes from the north of the province, to the river Diamante. Their heights reach an average 5000 meters, standing out the mountain range of the Tigre, the cords del Plata ,Portillo, Las Delicias and the mountains of Carrizalito and Melocotón.
Continuing with the mountainous atmosphere, the valley of Uspallata is in the Front mountain range.
The same one conforms an extensive depression that separates it of the formation precordillerana. The Precordillera is a solid one old, it possesses lower heights, of an average 3000 meters. It is also less extensive than the previous formations. It is born in the province of La Rioja, it continues for San Juan, and in Mendoza it forms the mountains of Villavicencio and Uspallata, concluding in the right riverbank of the river Mendoza.
This mountainous block, presents a high sismicidad that cause frequent movements that affect to the region. One of them is the one that affected to the you take care of Mendoza, in the year 1861, their consequences were serious.
Toward the southeast, and separated from the area cordillerana for a flat fringe, it is the block San Rafael. Their structure is rather low, and it is constituted by materials very old erosionados and rejuvenated. Two rivers cross it for deep canyons, the Diamond and the Atuel. The this mendocino, is a plain atmosphere and plain.
Their extension goes from the piedemonte cordillerano to the course of the Desaguadero. The south area is mainly conformed by transition reliefs toward the region patagónica, with volcanic forms.