Oases (plural of oasis) form when the wind cuts out deep channels in low-lying areas of the desert and uncovers underground water that fell as rain long ago. The water in some oases was rain that fell there about 20,000 years ago.
Oases (plural of oasis) form when the wind cuts out deep channels in low-lying areas of the desert and uncovers underground water that fell as rain long ago. The water in some oases was rain that fell there about 20,000 years ago.