Obsidian — a black, crystalline rock formed by a series of volcanic eruptions and deposited throughout the caldera — drew her attention. As an archaeologist, she saw the rock’s profound ...

To me, the sweeping savannas, striking volcanic landforms, and towering peaks that characterize the Great Rift Valley ... caldera with a pearly blue alkaline lake. Often called ”Africa’s ...

Lava fountaining within Kilauea’s summit caldera has stopped after just after 7 hours today. The Hawaiian Volcano Observatory said that “episode 14” of the ongoing eruption ended at 1:49 p.m ...

The 800-meter run, the two-lap sprint around the track, is anyone’s race and Caldera senior Dane Giessler knows it. Last spring, Giessler became the first Caldera boys track athlete to win a ...

Scientists were bracing for high lava fountains Tuesday during the latest episode of an ongoing eruption of Hawaii's Kilauea ...