請問什麼是地質名詞(非常急!! 十點)

Question

請問什麼是背衝斷層（backthrust）和豬背盆地(piggyback basins )?

Answer 1

背衝斷層 = backthrust fault

豬背盆地 Piggyback basins, as defined by G.G.^Ori and P.F.^Friend, are basins that are trapped when a thrust system propagates into its foredeep.

豬背盆地
Piggyback Basin - Basins formed on top of one or more thrust sheets and carried along by those thrust sheets. The Peshawar Basin of Pakistan is a modern example.
參考資料：
http://www.geology.um.maine.edu/user/Wes_Groome/piggybackbasin/html/piggybacks.html
http://www.geology.um.maine.edu/user/Wes_Groome/piggybackbasin/html/PoBasin.html

2007-07-30 11:14:41 補充：
(backthrust) 反冲断层
http://jpkc.nwu.edu.cn/stru/istrucai/content/007/07-04-03-05.htm
反冲断层(backthrust) 逆冲断层系中常出现与总体逆冲方向相反的逆冲断层，称作反冲断层。反冲断层主要发生于逆冲断层的前锋部位和断坡后侧；在应变较弱的断坪上也可发育。有些反冲断层向下产状变陡，甚至再转为与逆冲方向一致。下图是台湾造山褶皱带前陆逆冲断层与前锋部位产出的反冲断层。
反冲断层是因逆冲滑动中受断坡或锋缘前侧阻抗而反向逆冲形成的。

2007-07-30 11:29:43 補充：
豬背盆地 Piggyback basins = 背驮型盆地

2007-07-30 11:30:17 補充：
背冲型
http://jpkc.nwu.edu.cn/stru/istrucai/content/007/07-04-02.htm