* *澄清:* *你的问题是有效的,但如果你是指冯博士Frese的话转述在这篇文章中,你可能会把一个潜在的“分手开始”的“创建一个地质弱容易张性应力下的断裂”。我相信认为这样一个陨石坑可能导致开裂过程的开始不是由冯Frese博士娱乐自己。相反,根据你引用的文章,冯Frese解释说,南极和澳大利亚开始开裂大约1亿年前,恰巧和裂谷在发生不久的网站提出的影响。从文章:>削减直接通过火山口的裂痕,所以可能帮助裂缝形成的影响,冯Frese说。有点不清楚,但我认为冯Frese正在连接的火山口,大小可能有创建本地弱飞机在地壳将帮助任何开裂过程进行。这是一个似是而非的结论,但据我所知,距离以外的任何证据被发现来支持它。* *回答:* *坑的存在还没有验证,和最近的研究(怀疑)[1]的有效性宣称威尔克斯地结构实际上是一个陨石坑。此外,冈瓦纳的最后分手的日子相当完善,和足够的研究进行了构造(广泛的历史总结)[2]的时期。由冯Frese如上所述,大多数地质学家把威尔克斯地地区的断裂作用的开始在大约1亿年前,在白垩纪。如果我们允许假设火山口确实是由彗星撞击引起的,大多数研究表明,影响二叠纪-三叠纪界线的日期附近的时间,一个闻名的多个物种大灭绝时期,大约2.5亿年前。 That would leave roughly 70 million years between impact and Gondwana's very earliest rifting (~180 mya), which is a relatively significant amount of time by tectonic standards. As stated in the above reference, the current most accepted "method" of Gondwanan rifting is via mantle plumes forcing the continents apart from below. Based solely on these two pieces of evidence, I'd feel relatively confident in putting forth that the breakup of Gondwana was not caused by a bolide impact. If the Wilkes Land structure is ever drilled, and shocked quartz samples are found, I would want to revisit this answer to investigate what I'll call "Dr. von Frese's Planes of Weakness" claim more closely. [1]: http://onlinelibrary.wiley.com/doi/10.1029/JB084iB10p05681/abstract [2]: http://www.academia.edu/1037331/The_breakup_history_of_Gondwana_and_its_impact_on_pre-Cenozoic_floristic_provincialism