The dominant rock type in the Yellowstone region is rhyolite, and that is very rich in silica. As hot water circulates underground, it can dissolve that silica and bring it to the surface, where it is ...

A new light blue hot spring has formed in Yellowstone’s Norris Geyser Basin after months of small hydrothermal explosions.

A routine temperature check at the Norris Geyser Basin in Yellowstone National Park led geologists to discover a new blue ...

A surprising discovery at Yellowstone National Park has geologists buzzing! During a routine temperature check at the Norris ...

The blue water spring is about 13 feet in diameter and 1 foot below the rim, USGS said. The water in the pool was measured at ...