LSAT-11-1-16【asteroid-impact theory】

Question15-16

A favored theory to explain the dinosaurs, together with many other species, has been the globally catastrophic collision of a large asteroid with the Earth: Supporting evidence is an extraterrestrial chemical element in a layer of dust found worldwide at a geological level laid down contemporaneously with the supported event. A new competing theory contends that any asteroid impact was irrelevant, because it was massive volcanic activity that caused the extinctions by putting enough dust into the atmosphere to cool the planet. The Decean region of India contains extensive volcanic flows that occurred within the same time period as the supposed asteroid impact and the extinctions.

16. Which one of the following, if true, most of strongly indicates that the asteroid-impact theory is at least incomplete, if not false?

(A) Large concentrations of dinosaur nests with fossil eggs found in Alberta indicate that at least some species of dinosaurs congregated in large groups during some part of their lives.

(B) Dinosaur remains indicate that some species of dinosaur could have migrated in herds over wide ranges, so that they could have traveled to escape the local effects of certain catastrophes.

(C) Legends from many cultures, such as the Creex legend that Cudmus raised an army by sowing dragons’ teeth in the ground, show that various accident peoples worldwide were familiar with the fossils of dinosaurs.

(D) In the Gobi desert in China, where now only small animals can eke out an existence, fossil dinosaur skeletons 27 feet long were found in circumstances indicating that the climate there was as dry when the dinosaurs lived as it is now.

(E) The fossil record in Montano from below the layer of extraterrestrial dust shows a diminution over time in dinosaur species from 35 to 13, and dinosaur teeth found above the dust layer show a diminution in species from 13 to 5.

key's E。没有找到讲这一题E的帖子。

请问E是不是说在行星碰撞之后还有恐龙的存在，所以削弱了这个理论？

还有B，里面的catastrophes是指collision还是指volcanic activity？如果是指volcanic，那就是削弱volcanic理论了，如果是指collision，同样也就削弱了collision理论了。puzzled.

1。你对E的理解是对的。以灰层上下分撞击前和后。而上下都有恐龙。说明没在撞击中灭绝。

2。16题再将第一个理论，跟第二个理论无关，故灾难当然是COLLISION。B错的原因是原文说globally catastrophic collision，所以跑得了初一，跑不了十五。