How much does Sahara Desert cost?
[ 2006-03-22 09:40 ]
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Mention the Sahara Desert and many people think of
sand dunes stretching from horizon to horizon. While
enormous fields of sand cover some parts of the Sahara, that
sand only covers about 20% of the world's largest desert. The
rest consists of rocky plateaus, open plains of
gravel, and barren rocks.
From space, the Sahara is a mottled patchwork of
browns and yellows. The bright yellow-white sand fields are
especially prominent in the eastern and western regions, while
the wrinkled, brown Ahaggar and Tibesti mountain ranges
dominate the central area.
In the west, the great El Djouf basin ("The Belly") holds
one of the largest expanses of sand in the world. This almost
completely lifeless "empty quarter" of Mauritania is
more than 1000 kilometers (600 miles) across. In the east
there is even more sand, mostly concentrated in windblown
trails running southwest across Egypt and Libya. |
Sahara Deser:撒哈拉沙漠
sand dunes : 沙丘
plateaus: 高原
gravel: 沙礫
mottled: 斑駁的
Mauritania:
毛利塔尼亞(北非古國(guó))
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