[colorado tanker]

I'm not a subscriber, so I can't view the whole article, but I'm curious. How was the Ouachita-Appalachian barrier breached? An earthquake?

[SunkenCiv]

The truth is, I'm also not subscriber, but found this irresistable snippet while looking for something quite different on that website. I may have bought the issue anyway... hmm, can't find it... ah, last week's pizza box... still fresh... mmm...

[blam]

"I'm not a subscriber, so I can't view the whole article, but I'm curious. How was the Ouachita-Appalachian barrier breached? An earthquake?"

I'm not either. I'll venture a guess though. An Ice Age lake breached theOuachita Mountains?