In fact, if bedrock was not encountered until 1900 feet, that means we could probably dredge the Mississippi enough to turn it into a deep weather port, or bring back a Northern chunk of the Gulf of Mexico with a beach at Evansville, Indiana.
The possibilities are endless.
Remember, Freepers tend to distrust scientists who fail to claim have a commercial ambition. For them early warning of an earthquake swarm in the Midwest and Central South is not enough.
I assume you were referring to me, correct?
Bedrock at 1900 feet - that's some mighty unstable soil come earthquake time if sand is involved. It would certainly be interesting to get a better picture of the underlying rock layer; this factoid would lend itself to the theory of a wide valley of soil overlaying a bedrock canyon of enormous size...
A question - will this soil "liquify" during an earthquake event? If so, St. Louis and any effected cities are in for a world of hurt.