The feature of landslide time space movement was a geological process of landslide geological mass from a state to a other state under internal and external factors action.

滑坡时空运动特征是滑坡地质体在内因和外因共同作用下，自一种状态向另一种状态转化的地质过程。

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Several other mass extinctions in the geological record have been tentatively identified with large impacts, but none is so dramatic as the Cretaceous event.

地质记录中的其他几次大规模物种灭绝也被认为影响重大，但没有哪一次像白垩纪大灭绝那样夸张。

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While there are a dozen or more mass extinctions in the geological record, the Cretaceous mass extinction has always intrigued paleontologists because it marks the end of the age of the dinosaurs.

虽然在地质记录中有十几次甚至更多的大灭绝，但白垩纪的大灭绝总是引起古生物学家的兴趣，因为它标志着恐龙时代的结束。

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Mass extinctions, says Anthony Barnosky, are geological events in which at least 75% of animal species were wiped out.

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But we are the only species to have defined a geological period by our activity something usually performed by major glaciations, mass extinction and the colossal impact of objects from outer space, like the one that defines the upper boundary of the Cretaceous.

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