There are two known volcanoes under the ice field; Lautaro and Viedma.

Twenty-three known volcanoes operated in Colorado, some of them much larger than Vesuvius or Popocatepetl.

These features include extensive lava flows, vast lava plains, and the largest known volcanoes in the Solar System.

The books say Olympus Mons on Mars is the biggest known volcano.

El Jorullo is one of two known volcanoes to have developed in Mexico in recent history.

Olympus Mons is the tallest known volcano in the Solar System; it is 100 times larger than any volcano on Earth.

The scientists report in Nature that their data covered about 900 of the region's roughly 1,100 known volcanoes, about 50 of which have been considered potentially active.

Olympus Mons is the tallest known volcano.

Of the entire volcanic field, the southern portion has the most known volcanoes.

The only known active volcano in the area is Kick 'em Jenny, just north between Grenada and Carriacou.