TPO6阅读2的句子简化题Butasmoreandmoreaccumulationsofstratawerecatalogedinmoreandmoreplaces,itbecameclearthatthesequencesofrockssometimesdifferedfromregiontoregionandthatnorocktypewasevergoingtobecomea

Question

TPO6 阅读2 的句子简化题
But as more and more accumulations of strata were cataloged in more and more places,it became clear
that the sequences of rocks sometimes differed from region to region and that no rock type was ever
going to become a reliable time marker throughout the world．
Which of the sentences below best expresses the essential information in the highlighted sentence in the passage?Incorrect choices change the meaning in important ways or leave out essential information．
○The discovery of regional differences in the sequences of rocks led geologists to believe that rock types could someday become reliable time markers．
○Careful analysis of strata revealed that rocks cannot establish geological time because the pattern of
rock layers varies from place to place．
○Smith's catalogs of rock strata indicated that the sequences of rocks are different from place to place
and from region to region．
○Because people did not catalog regional differences in sequences of rocks.It was believed that rocks
could never be reliable time markers.
但是我觉得没有那个因果关系啊 虽然其他的都分析出为什么错了.主要纠结因果关系.

Answer 1

这句话的意思是:世界各地所发现的岩层积累形式的增加(accumulation of strata不是指一层,而是很多层组成的一种pattern),虽然没说这些岩层具体积累的方式,但是肯定各有不同,也就是说,某种stratum在不同地方的accumulation中位置是不同的,因此在不同的accumulation中这种stratum可能代表的是不同的纪元,结论就是没有一种岩层能够绝对指向某一个时间段,真正能够确定时间的是accumulation的pattern.
前提：时间正确的确定法是——分析一组岩层的sequence
因：因为不同地域岩层的sequence不用
据前提：任何一种岩层根据不同sequences 分析出的时间也相应不同
果：岩层和时间没有对应关系,即：岩层不能作为time marker