【題目】 北宋科學家沈括在《夢溪筆談》中記載:予奉使河北,遵太行而北,山崖之間,往往銜螺蚌殼及石子如鳥卵者,橫亙石壁如帶。此乃昔之海濱,今東距海已近千里。

據(jù)此,回答下面小題。

1根據(jù)沈括的記載,以下說法正確的是( )

A. 古代的海螺是生活在陸地上的B. 太行山不久將從陸地變?yōu)楹Q?/span>

C. 太行山曾發(fā)生過火山噴發(fā)活動D. 太行山是從古老海洋演變來的

2造成海陸變遷的主要原因是( )

A. 人類活動B. 火山爆發(fā)

C. 地殼的變動和海平面升降D. 地球的公轉(zhuǎn)運動

【答案】

1D

2C

【解析】

地球上的海陸分布并不是固定不變的,是會發(fā)生變化的,由于地殼的變動和海平面的升降,海洋可能會變成陸地,陸地也有可能會變成海洋。

1根據(jù)沈括的記載,古代的海螺是生活在海洋當中,太行山此處是由于海平面上升形成的,是從古老的海洋中演變來的,故選D。

2造成海陸變遷的主要原因是由于地殼的變動和海平面的升降,比如臺灣海峽發(fā)現(xiàn)森林遺跡、喜馬拉雅山發(fā)現(xiàn)海洋生物化石等例子都能證明,故選C。

本題考查海陸變遷的有關(guān)知識,要知道幾個典型的例子。

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