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The Great Escarpment
The Great Escarpment, although, occupies a very small area, the nature of its slope and the effect it has on the climate makes it a separate physiographic region. The eastern side of the Highlands is demarcated because of the escarpment. In this region, the altitude of the escarpment is 790m. In some regions, the height decreases gradually. The escarpment is very steep particularly from Sao Paulo to Porto Alegre. The escarpment act as a barrier to the Southeast Trade winds giving rise to the rain- -shadow area in the northeastern part of the highlands. The region to the north of this area is called ‘Drought Quadrilateral.’