[TigersEye]

Thanks gleeaikin. This is interesting stuff. I had no idea there were so many extinction events. They usually only talk about the big ones.

[gleeaikin]

Thanks for posting the charts. Also, you may want to look at the following FR link. I made an extensive and detailed comment there, #34, which may interest you and others concerned with natural disaster and volcanoes.

http://www.freerepublic.com/focus/f-bloggers/3280739/posts

[gleeaikin]

Note the smaller but distinct spike about 34 million years ago labeled “End Eocene”. That would be the Chesapeake Meteor that struck just north of Norfolk leaving a crater 60 miles in diameter. Norfolk and territory are on the south rim of the crater, the odd bends in the James and other rivers entering into the Bay are also traversing the western rim. The north rim is at Exmore on the Delmarva Peninsula.