GMAT考试资料：GWD试题合集（二十五）.

　　以下将为正在备战GMAT考试的同学们整理一些经典的GMAT阅读试题，并分多个合集推出，希望能够为正在备考GMAT考试的考生提供或多或少的帮助。

　　13. GWD-10-Q4 -Q6 San Andreas Fault断层成因探析

　　Prior to 1965 geologists assumed

　　that the two giant rock plates meeting at

　　the San Andreas Fault generate heat

　　Line through friction as they grind past each

　　(5) other, but in 1965 Henyey found that

　　temperatures in drill holes near the

　　fault were not as elevated as had

　　been expected. Some geologists

　　wondered whether the absence of

　　(10) friction-generated heat could be

　　explained by the kinds of rock composing

　　the fault. Geologists’ pre-1965

　　assumptions concerning heat generated

　　in the fault were based on

　　(15) calculations about common varieties of

　　rocks, such as limestone and granite;

　　but “weaker” materials, such as clays,

　　had already been identified in samples

　　retrieved from the fault zone. Under

　　(20) normal conditions, rocks composed of

　　clay produce far less friction than do

　　other rock types.老新观点

　　In 1992 Byerlee tested whether

　　these materials would produce friction

　　(25) 10 to 15 kilometers below the Earth’s

　　surface. Byerlee found that when clay

　　samples were subjected to the thousands

　　of atmospheres of pressure

　　they would encounter deep inside the

　　(30) Earth, they produced as much friction

　　as was produced by other rock types.

　　The harder rocks push against each

　　other, the hotter they become; in other

　　words, pressure itself, not only the

　　(35) rocks’ properties, affects frictional

　　heating. Geologists therore wondered

　　whether the friction between the

　　plates was being reduced by pockets

　　of pressurized water within the fault that

　　push the plates away from each other.新发现

　　现象解释

　　逻辑简图：

　　1P: prior to 1965, geologist assumed that… but in 1965 H found that… Geologists pre-1965 assumption based on….. but weaker material…

　　2P: 1992, B tested, found that…. In other words…. Geologists therore wondere…

　　以上就是本期GMAT试题的所有内容，考生可以此为据并进行针对性的练习，逐步掌握GMAT阅读的解题规律及技巧，以达到迅速提高GMAT考试成绩的目的。 相关链接：

1.GMAT考试资料：GWD试题合集（二十四）

2.GMAT考试资料：GWD试题合集（二十三）

3.GMAT考试资料：GWD试题合集（二十二）

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