The geology of Colorado has not changed much since the first edition of Roadside Geology of Colorado in 1980, but the understanding of geology has--particularly the comprehension of billion-year-old granites and gneisses of Precambrian time that form the core of the Rocky Mountains. With improved age-dating techniques geologists can now distinguish Precambrian rocks of different ages, giving readers more detailed maps and a more accurate interpretation of the rock history passing beneath their tires and outside their car windows.
That's not all that's changed in this reader-friendly new edition: 50 percent of the photographs are new; all the maps have been updated; and seven new road guides lead you on spectacular trips--including Colorado 65, which crosses over the Grand Mesa. Chronic and Williams break Colorado into four digestible geographic regions: the Plains, the Rockies, the Plateaus, and the San Juans. The authors also guide you through several national treasures, including Black Canyon of the Gunnison National Monument, Rocky Mountain National Park, Dinosaur National Monument, Great Sand Dunes National Monument, Mesa Verde National Park, and Florissant Fossil Beds National Monument.
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