A plain is broad area of reasonably smooth and flat land, primarily treeless. Plains form due to erosion from ice and water, removing dirt and rock minerals. The sediments are carried down hillside and deposited. The dumped sediments, layer upon each other on land, forming plains.
The Nullarbor Plain is located in Australia, travelling between Western Australia and South Australia. Something fascinating about the Nullarbor Plain is holds the Earth's largest remains of limestone pieces. The name Nullarbor is originated from Latin and means 'no trees'.
The Indo-Gangetic Plain also referred to as the North Indian Plain. It is located in the northern regions of India.
The Mississippi Plain covers areas of the Mississippi and Ohio Rivers. Located in the Gulf of Mexico.