A 2.35-billion-year-old meteorite with a unique chemical signature, found in Africa in 2023, plugs a major gap in our ...

Residents are wearing masks to protect themselves from thick volcanic ash that is blanketing several Indonesian villages as ...

In geology, even small layers can tell big stories. But figuring out the origins of such small layers can be a challenge, ...

Learn more about the new hydrothermal feature that appeared last summer in Yellowstone National Park, and how, even though it ...

Led by Dr. Kenneth Sims, a noted geologist at the University of Wyoming and a member of the USGS Yellowstone Volcano Observatory, the research team discovered that mafic volcanism—characterized by ...

The background cliff is the Summit Lake rhyolite lava flow, which is about 111,000 years old. The camera is a temporary deployment installed on a sloping and damaged boardwalk, which is why the ...

Rhyolite lava flow textures from Long Valley and Yellowstone calderas. A) Photograph of well-developed spherulites in a lava flow from Long Valley Caldera in Eastern California.

A mafic volcanic eruption is one characterized by lava flows low in silica and high in iron and magnesium. Rhyolitic lava flows are viscous in nature and form lava domes that are thick and blocky.

The architect believes the lava that flows from a single eruption could yield enough building material to lay the foundations of an entire city.

Inside the Yellowstone supervolcano eruption that would 'instantly' kill 90,000 people Geologists recently discovered signs of rhyolitic volcanism in the northeast-shifting Yellowstone caldera.