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【题目】石漠化已成为西南地区头号生态灾难,治理石漠化刻不容缓。下列属于石质荒漠化形成的条件有( )

①高温多雨的气候 ②可溶性岩石广布 ③昼夜温差大 ④地势低洼,易于积水

A. ①② B. ①③ C. ②③ D. ③④

【答案】A

【解析】

石灰岩地层是形成喀斯特地形的基础它们是远古时代海洋沉积物形成的地层这些石灰岩地层,陆续上升并出露地表后,经过复杂而漫长的外力作用,逐渐形成为喀斯特地形

自然因素是石漠化形成的基础条件。①岩溶地区丰富的碳酸盐岩具有易淋溶、成土慢的特点,是石漠化形成的物质基础。山高坡陡,②气候温暖、雨水丰沛而集中,为石漠化形成提供了侵蚀动力和溶蚀条件。此外,岩溶地区人口密度大,地区经济贫困,群众生态意识淡薄,各种不合理的土地资源开发活动频繁,导致土地石漠化。故选A。

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