题目内容

【题目】某地质勘探小组在我国江南丘陵地区自西向东水平距离各相差500米的A、B、C三处对我国某地某沉积岩层进行探测，数据如表。当地表层为潮湿、粘稠的红土土壤，其下为沉积岩层，其中的沉积岩埋藏深度是指岩层距离地面的垂直距离。回答下列各题。

地点

A

B

C

海拔（m）

400

250

460

某沉积岩埋藏深度（m）

212

73

231

【1】该区域可能属

A．向斜谷 B．背斜谷 C．向斜山 D．背斜山

【2】该区域适宜种植的农作物是

A．棉花 B．大豆 C．苹果 D．茶叶

【答案】

【1】B

【2】D

【解析】

试题分析：

【1】从表中数据可知，B处海拔比两侧的A、C两处低，可判断地貌为谷地。B处沉积岩的埋藏深度数值比两侧的A、C两处数值小，说明B处沉积岩层顶部海拔高，该段岩层向上凸起，可判断为背斜。该区域是背斜谷，B对。

【2】根据材料中信息，当地的表层土壤是潮湿、粘稠的红色土壤，可以判断该地位于我国江南丘陵。该地区土壤呈酸性，适宜茶叶生长，D对。不适宜棉花、大豆、苹果生长，A、B、C错。

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