Deserts of the Americas
- The Sonoran Desert covers 120,000 square miles in Arizona.Jupiterimages/Photos.com/Getty Images
The Great Basin (190,000 square miles) is the largest sand and gravel desert in North America. The Chihuahuan Desert (175,000 square miles), a high plateau, stony and mountainous desert in Mexico, is the second-largest and the Colorado Desert (130,000 square miles) is the third largest. The Sonoran Desert (120,000 square miles), covered with sand and gravel, has the most rainfall, whereas the Mojave Desert (15,000 square miles), also covered with sand and gravel plains, has salt flats.
Deserts in South America include the the cold-winter Patagonian (260,000 square miles) desert in Argentina and the cool-coastal Atacama (54,000 square miles) desert in Chile, the driest place on earth.
Deserts of Africa
- The Namib Desert in southwestern Africa has the highest sand dunes on Earth.Tom Brakefield/Stockbyte/Getty Images
The Sahara Desert (3.5 million square miles) covers most countries in northern Africa -- an area stretching from the Red Sea to the Mediterranean Coast where 4 million people live. It is the largest sandy subtropical desert in the world. Farther south, the Kalahari Desert (220,000 square miles) in southwestern Africa is also a sandy subtropical desert. It spans South Africa, Botswana and Namibia. The Namib Desert, also in southwestern Africa is the oldest desert (13,000 square miles) that has the highest sand dunes on Earth. This cool-coastal desert stretches across the coastal borders of Angola, Namibia and South Africa.
Deserts of Asia
- The Taklamakan Desert is one of the world's largest shifting sand deserts.Guang Niu/Getty Images News/Getty Images
The Arabian Desert (1 million square miles) in southwestern Asia is the largest sandy subtropical desert in the Arabian peninsula, whereas the cold-winter Iranian Desert (100,000 square miles) is the smallest in Asia. Other deserts in Asia include the Gobi (500,000 square miles), a vast plains rocky desert that stretches across China and Mongolia. The Taklamakan (105,000 square miles) is China's largest sand desert. In Central Asia, the Kara-Kum (135,000 square miles) with its black sandy plains, spans across Uzbekistan and Turkmenistan and the Kyzyl-Kum (115,000 square miles) desert stretches across Uzbekistan, Turkmenistan and Kazakhstan. Farther south, the Thar (175,000 square miles), which has sand plains and hill landforms, stretches across northern India and Pakistan.
Deserts of Australia
- Australia is the driest continent on Earth.NA/AbleStock.com/Getty Images
Apart from the Antarctica, Australia is the driest continent on Earth. Deserts account for 18 percent of the total land. The Great Victoria Desert is the largest Australian desert. It is a subtropical desert (250,000 square miles) that stretches across western and south Australia. The second largest is the Great Sandy Desert (150,000 square miles) with stretches of red plains and rock formations that span across northern Western Australia. The Gibson Desert, the smaller of the three deserts, is a subtropical desert (120,000 square miles) with sand hills that stretch across Western Australia.