Eritrea

Eritrea consists of a northward extension of the Ethiopian Plateau, bordered by lower plains to the east and west. The plateau, 6,500 feet (2,000 m) in elevation, is dissected by the valleys of westward-flowing rivers whose eroding action has formed steep-sided, flat-topped formations known as ambas. To the east, the arid, treeless coastal plain (10 - 50 miles [16 - 80 km] wide) is sharply delimited