The Yellowstone Caldera is often referred to as the Yellowstone Supervolcano due to its colossal size; it's one of the ...

So it’s unlikely to erupt. Rhyolitic magma, on the other hand, is much thicker and more resistant to flow. Underneath ...

However, hotspots can also melt the material around them, changing the composition of the lava and producing a type of molten material called rhyolite. Whereas basalt magma is more liquid ...

Lava domes are rounded, steep-sided mounds built by magma that is highly resistant to flow, usually either dacite or rhyolite. Such magmas are typically too viscous to move far from the vent ...

and magma still flows to this day. According to the USGS, the new feature sits at the foot of a rhyolite lava flow about 10 feet above the marsh, which is all within a hydrothermally altered area ...