[SlowBoat407]

I don’t see any problem here. Current theories posit periods of explosive diversification when conditions are favorable, in between periods of mass extinctions when conditions get harsh. The survivors of those periods then go on to be the basis for the next big burst of diversity. In fact, we’re in a rather dormant period of development, I believe, because we’re just emerging from an Ice Age. When it gets warmer (as it inevitably does) we’ll see another period of rapid diversification.

[Eric in the Ozarks]

No problem at all. Check out information on the New Harmony Fault which shows hundreds of earthquakes in the Wabash Valley of the Illinois Basin.
One of these was a very big bang because the Number 5 coal seam comes to a sudden stop horizontally and can be found to continue on 180 feet below this point in southern Illinois/Indiana. That would be quite a rip, eh ?