This new field-trip guide from The Geological Society of America takes readers on a six-day, west-to-east geologic journey across the Mesozoic magmatic arc of the central Sierra Nevada in California, ...

Earth's crust once formed a dense "root" supporting Colombia's northern Sierra Nevada de Santa Marta mountains, but new research suggests this prop sank into the mantle millions of years ago. When you ...

Geology, wilderness, wildlife, seasonal weather and vivid memories may come to mind when thinking about the Sierra Nevada mountain range. There are plenty of opportunities for outdoor enthusiasts to ...

The Association of American State Geologists is holding their annual meeting in the Sierras this year, hosted by the Nevada Bureau of Mines and Geology. The chief executives of each of the state ...

One of the longest ongoing controversies in Earth science concerns the age of California's Sierra Nevada, the tallest mountain range in the continental United States and site of Yosemite National Park ...

Parts of western U.S. were once covered in thousands of feet of lava from dozens of Yellowstone-size supervolcanoes that erupted between 40 and 20 million years ago, scientists have said. These ...

(CNN) — Seismologist Deborah Kilb was wading through California earthquake records from the past four decades when she noticed something odd — a series of deep earthquakes that had occurred under the ...