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Date Time Scientists Probe Mysterious Melting of Earth’s Crust in Western North America From left, UW students Shane Scoggin, Adam Trzinski and Jessie Shields are part of new research investigating crustal melting in western North America. Here, they examine igneous rocks in the Snake Range of Nevada. (Jay Chapman Photo) A group of University of Wyoming professors and students has identified an unusual belt of igneous rocks that stretches for over 2,000 miles from British Columbia, Canada, to Sonora, Mexico. The rock belt runs through Idaho, Montana, Nevada, southeast California and Arizona...

From left, UW students Shane Scoggin, Adam Trzinski and Jessie Shields are part of new research investigating crustal melting in western North America. Here, they examine igneous rocks in the Snake Range of Nevada. (Jay Chapman Photo) A group of University of Wyoming professors and students has identified an unusual belt of igneous rocks that stretches for over 2,000 miles from British Columbia, Canada, to Sonora, Mexico. The rock belt runs through Idaho, Montana, Nevada, southeast California and Arizona. “Geoscientists usually associate long belts of igneous rocks with chains of volcanoes ...