The Yellowstone region's Beartooth Mountains feature some of the most ancient rocks in North America — as old as 3.96 billion ...

In the middle of the Pacific Ocean, thousands of miles from any continent, Easter Island rises out of the sea. Its surface ...

US Geological Survey geologists estimated large potential for—and large uncertainty about—the amount of hydrogen ...

Newly published research has revealed that compositional rock anomalies within oceanic plates caused by ancient tectonics ...

The changes in ocean chemistry were gradual. The Archaean period lasted 1.5 billion years. This is more than half of Earth’s ...