Wyoming geologist Carol Frost and three of her colleagues have identified a new oldest rock in America. Found in Michigan, ...

What we know today as Sabino Canyon was the site of a whole lot of scrunching 25 million years ago. In a geologic nutshell: Two ancient types of rock - 1.4-billion-year-old Oracle granite and 50 ...

Scientists have discovered that the oldest intact rock in the United States is not in Minnesota or Wyoming—but in Michigan’s Upper Peninsula. The 3.62-billion-year-old Watersmeet Gneiss is rewriting ...

Several thousand feet of underground workings through granite gneiss, limestone and schist ... Explore the Dragoon Mountains and Cochise’s Council Rock on March 4 with historian William Ascarza.

For the second time in about five years, North Carolina Granite Corp. has changed hands, with plans this time around calling ...

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