작성일 : 07-05-25 02:41
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토플배경지식 : 모래사구- linear dune
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글쓴이 :
9◎林 (222.♡.180.205)
 조회 : 3,075  추천 : 0
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토플배경지식 : Origin
Linear dunes have formed in areas now characterized by wide ranges of wind speeds and directions.
Most are probably "fossil" dunes formed under more vigorous wind regimes during Pleistocene climatic conditions. Since then, wind regimes have apparently become less intense, although wind directions are apparently similar. Thus, where linear dunes are active today, they are commonly being modified into compound or complex features by the addition of secondary dunes.
오- 신기하다~~
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select * from g4_write_BD_toefl where wr_is_comment = 0 order by wr_num, wr_reply limit 1365, 15
> board
Total 1,375
