Dinosaur National Monument: Jurassic Park Or Jurassic Jumble?
By William A. Hoesch and Steven A. Austin*
How Did the Vertical Columns at Devil's Tower Form?
Visitors often marvel at the beautiful columns of rock standing at places like Devil's Tower in Wyoming. There a mountain of rock rises from the ground in a series of regular, multi-sided columns, extending scores of feet into the air. Columns at the Giant's Causeway in Ireland and elsewhere seem so precise that fanciful legends have grown up around them.
Do Millions of Laminae in the Green River Shales Document Millions of Years?
The Green River oil shales have provided one of the very strongest arguments for millions of years, or at least one of the most used.
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