A high-silica type of igneous rock called rhyolite ... Beneath it is an even larger reservoir made of low-silica basalt and containing far less molten rock, according to a University of Utah ...

Check out 24 of the world’s must unusual landscapes — from the hellish Darvaza Gas Crater in Turkmenistan to the “snow monsters” of Mount Zao, Japan.

The hard basalt columns are the result of the surrounding ... it was formed by surrounding sedimentary rocks eroding, leaving the igneous rocks to stand sentinel over the area.

Using artificial seismic waves, the team determined that a type of igneous rock called ... reservoir made of low-silica basalt and containing far less molten rock, according to a 2015 University ...

A high-silica type of igneous rock called rhyolite makes up Yellowstone's magma chamber, which spans an area 55 miles by 30 miles, dropping to a depth of 10 miles below the surface. Beneath it is an ...

The St. Francois Mountains in Missouri, for example, are actually the eroded tops of some of the oldest exposed igneous rocks in ... leaving behind layers of basalt rock. In Kentucky, the Hicks ...