> > There are to many holes in the theory. My favorite example, is that the > creatures that should have been severely affected such as birds, frogs, > turtles and many forms of microscopic life, in fact survived the > event.
There seemed to be a preference for the larger animals to go extinct with these impacts. This is not surprising, as the larger animals tend to be on the top of the food chain, and more susceptible to large enviromental changes. The smaller animals had a better chance for survival, which is shown in the fossil record across the KT boundary. The birds, frogs and turtles were not doubt severely affected by the impact, and I'm sure several subspecies went extinct, but there were a few that managed to survive. And it only take a few survivors to keep the species going. The animals like frogs and turtles had one extra thing in their favor - the ability to hibernate. This probably played a key role in their survival abilities. Bird are very mobile and can travel long distances to safer ground, so that probably aided in their survival. Ron Baalke ______________________________________________ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
