Originally Posted by cpaharley2008
very interesting article, between that calamity and the Yellowstone eruption, the East or middle America may become an island....
A fact for the day.
The center of the country was an ocean, the Western Interior Seaway, from the Arctic, through Canada to the present Gulf of Mexico in relatively recent geological times.
The evaporation of this sea and probably similar seas resulted in the great salt mines under the lakes and Michigan. (Detroit has one salt mine with a 100 miles of underground roads.)
Things do change.