the sahel is the semiarid region between the sahara to the north and the savannas to the south extending from senegal to ethiopia. the sahel forms a bell that separates the arcid sahara from tropical west africa
The Sahara dessert is the world largest dessert comprising an area of 3,500,000 square miles extending from the Atlantic Ocean to the Red Sea, the Sahara dessert is bordered on the north by the Atlas Mountains and the Mediterranean Sea and on the south by the Sahel.
The Atlas Mountains is a system of ranges and plate Austin north west Africa. Extending 1,500 miles from south west Morocco through Algeria to north Tunisia. The atlas system is most rugged in Morocco, where. The highest mountain ranges are found.
The khalari dessert is an arcid plateau that spans three countries covers 100,000 square miles in South Africa.