The Prairie Citizen #10--The Lincoln Memorial
Guardrails of Democracy

Great Plains Geology

Great Plains Geology (Discover the Great Plains)Great Plains Geology by R.F. Diffendal
My rating: 4 of 5 stars

I picked up this enjoyable book in the bookstore at Agate Fossil Beds National Monument in the panhandle of Nebraska while on our recent vacation. That night during my insomnia I began it and have been snatching bits and pieces since.

After helpful introductory chapters, the bulk of the book is a series of descriptions of prominent sites throughout the plains. This makes it a good travel guide as well. A handful of those sites we had seen on our trip.

The three most interesting things I learned reading the book--

1) The Black Hills was a single dome uplifted at the time of the Rocky Mountains uplift and then weathered down to create the peaks and valleys.

2) At Scottsbluff National Monument is not an uplift. The "original" floor of the plains was the top of the bluff. The plain lying far below is in fact erosion from the Platte River. The author said to stand atop the bluff and realize the unimaginable amount of sediment that has been washed down river and ultimately to the Gulf. Maybe Louisiana was made from Nebraska?

3) The Guadalupe Mountains in New Mexico and Texas are ancient coral reefs. Carlsbad Caverns is the remnant of those reefs.

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