Question

The
is made up of very old hard rocks.
The largest intermontane platean in South America is​

Answer 1

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Atacama Plateau

Answer. Explanation: Atacama Plateau, Spanish Puna De Atacama, cold, desolate Andean tableland in northwestern Argentina and adjacent regions of Chile. It is about 200 miles (320 km) long (north to south) and 150 miles (240 km) wide and has an average elevation of 11,000 to 13,000 feet (3,300 to 4,000 m).