Whereas basalt magma is more liquid, rhyolite is more viscous. It doesn’t flow readily, and when it erupts, it can cause explosive eruptions. This is the type of magma that’s troubling ...

Yellowstone Caldera Chronicles is a weekly column written by scientists and collaborators of the Yellowstone Volcano Observatory. This week's contribution is from Ninfa Bennington, geophysicist ...

Figure 3: Eruption record between two caldera-forming eruptions in the Jemez Mountains Volcanic Field. Uncertainties plotted are 2σ. Red= fayalite-bearing rhyolite, blue= biotite-bearing rhyolite, ...

Comparing pollen records from three lakes in different geological substrates highlights the influence of geology and climate on long-term vegetation development.

Lava domes are rounded, steep-sided mounds built by magma that is highly resistant to flow, usually either dacite or rhyolite ... seen between the May and July eruptions in 1980.

An eruption lasts 1 1/2 to 5 minutes ... The lobby of the hotel features a 65-foot ceiling, a massive rhyolite fireplace, and railings made of contorted lodgepole pine. Wings were added to ...