Yellowstone National Park's geological history is one of the most intensely studied in North America. A new geologic unit ...

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

Lava is the form of magma that erupts to the surface, ... According to Oregon State University, these are the temperatures of common lava types: Rhyolitic lava: 1292 to 1652 degrees Fahrenheit; ...

The West Yellowstone rhyolite lava flow is located along Highway 20 (between the West Entrance of Yellowstone National Park and Madison Junction). The flow is approximately 111,000 years old and ...

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

Previously, it was thought that the youngest eruption in the region was the rhyolite lava of the Pitchstone Plateau about 70,000 years ago, while the youngest known basalt flow was 120,000 years old. ...

Rhyolitic lava is felsic; the name is derived from feldspar and silica, which are present in high concentrations. Intermediate lavas, including andesitic, fall somewhere in between. One kind of lava ...

Scientists are unsure if the plume will return in the springtime, but if it does, Yellowstone will have gained a new sight to behold. While Yellowstone’s last lava flow hardened long ago, the ...

A slow-moving lava flow made of glass is still inching its way down a volcano in Chile, nearly a year after it first erupted, geologists recently discovered. IE 11 is not supported.

On the other side of the marsh is a tree-covered rhyolite lava flow, and at the base of the flow is a new thermal feature that formed in early August 2024, marked by a plume of steam.

On the other side of the marsh is a tree-covered rhyolite lava flow, and at the base of the flow is a new thermal feature marked by a plume of steam that formed in early August 2024. Photo by Mike ...