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 ...

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 ...

Where previously there had been a rather featureless patch of ground at the northwestern tip of a landmark known informally ...

Who would have thought that a neonatal hot spring would pop up so surreptitiously in an area renowned for geology fireworks? But during April 2025, geologists on a regular maintenance run through ...