The Thar Desert, also known as The Great Indian Desert, is a large, arid region in the northwestern part of the Indian subcontinent that forms a natural boundary between India and Pakistan. It is the world's 17th largest desert, and the world's 9th largest subtropical desert. About 75% of the Thar Desert is in India, and the remaining 25% is in Pakistan. In India, it covers about 320,000 km2 (120,000 sq mi), forming approximately 10% of the total geographic area of India. More than 60% of the desert lies in the state of Rajasthan and extends into Gujarat, Punjab, and Haryana. This desert comprises a very dry part, the Marusthali region in the west, and a semi-desert region in the east with fewer sand dunes and slightly more precipitation.