有关这次大灭绝事件，大家是众说纷纭。首先当时大陆的形状就是个火烧联营的姿态，当时地球上形成了一个超级盘古大陆，基本就是个C字形，头顶是西伯利亚，和大陆若即若离。脚底下是南极大陆，澳大利亚和南极是连在一起的，构成了C字下面那个勾。上面那个勾是谁啊，就是华北地块，和西伯利亚地块靠的很近。华南那时候是个大岛。漂在不远处的海里。C字形包围的海域里有一系列小岛，横向排列，土耳其、西藏、马来这些小块的陆地把海域分成南北两块，北边是原特提斯洋，南边是特提斯洋。C字外边就是一望无际，连绵不断的泛大洋。正因为大陆都集中在一起，遇上个彗星撞地球，就容易火烧连营。再说这样辽阔的大陆，在下沉气流控制的区域就产生了非常大的荒漠，比现在的撒哈拉要大多了，洋流也跟现在完全不一样。对海洋生物，这样的环境不怎么友好。就在这个这时候，南极被一颗小行星击中了。小行星的直径大概是45~60公里。这家伙是个庞然大物，砸进来以后立刻掀起遮天蔽日的烟尘。很多动物还没来得及反应就over了，这场灾难比灭绝恐龙的那一场大多了……
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