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【题目】下图示意我国南方某区域,T1T2T3为水平岩层,读图完成下列各题。

1

A. T1 T2 T3 B. T2T3T1

C. T3 T1 T2 D. T3T2T1

2

A. 断裂下陷

B. 背斜顶部受外力的侵蚀作用

C. 流水的侵蚀作用

D. 冰川的侵蚀作用

【答案】

1A

2C

【解析】试题分析:

1】读图,根据图例可知,T1T2 T3都是沉积岩,沉积岩层下面的是老岩层,根据图中的海拔高度判断,T1海拔最低,在下面形成的早,T2居中,T3在最上面,形成最晚,所以图中岩层从老到新的排列顺序是T1T2 T3A对。BCD错。

2】读图,图中岩层都是沉积岩,露出的水平岩层中间老两翼新,说明是背斜构造。山谷中有河流存在,说明河谷是受流水的侵蚀作用形成,C对。图中岩层没有断裂下陷,A错。外力作用包括流水、风力、冰川、海浪等的侵蚀作用,B错。南方地区没有或很少冰川的侵蚀作用,D错。

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