IOWA CITY — Some 375 million years ago, Iowa was under water. The temperatures were hot, and brightly colored corals and huge fish moved through the shallow sea. Visitors can see a glimpse of this ...
JOHNSON COUNTY, Iowa (KCRG) - When more than 300 billion gallons of floodwater poured over the Coralville Lake spillway in 1993, it washed away several feet of silt, sand, and limestone, revealing ...
The Devonian Period, spanning approximately 419–359 million years ago, represents a pivotal phase in South America’s deep-time history. Fossiliferous formations across the continent—particularly ...
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