Question

what is the name of the vast plains of pampas

Answer 1

The Pampas. The Pampas, also called the Pampa, Spanish La Pampa, vast plains extending westward across central Argentina from the Atlantic coast to the Andean foothills, bounded by the Gran Chaco (north) and Patagonia (south).

Answer 2

The name of the vast plains of pampas is 'The Pampas'. It is one of the largest fertile grassland plain, covering almost one-third area of Argentina's land area. Pampa is in fact Quechua ( flat plain). The pampas extends for 750,000 square kilometers from the Atlantic to the Andes and continues into Uruguay.