One said there was no lava on the moon.
Instead of lava, ash, and sulfur dioxide, these volcanoes spew mud and methane.
Deep inside the Earth are very hot molten rocks called lava.
"The only atmosphere this object has is produced from vapor arising from hot molten silicates in a lava lake or lava ocean," said Bruce Fegley Jr., of Washington University in St. Louis.
If he cannot cause his foes to writhe in agony, he instead forces the ground beneath them to open up, calling forth lava to immolate his foes.
A huge one near the East Pacific Rise erupted in 1991, releasing molten lava that basically paved the seafloor and choked off the geyser, obliterating the vent creatures.
The volcano erupted molten lava.
They found Shatsky Rise is made up of layers of hardened lava, with individual lava flows up to 75 feet thick (23 meters).
Over time, lava and ash break down to form fertile soils ideal for agriculture.
Scientists believe these holes form when the ceiling of a subterranean lava tube collapses, possibly due to a meteorite strike.
The ledge was covered with heavy ash, called tephra, and speckled with droplets of volcanic glass and delicate lava threads known as Pele's hair.
This lava field just north of the Mýrdalsjökull ice cap serves as one of many monitoring sites to track ground deformation that could serve as a signal of an impending eruption of Katla.
The eruption opened a 500-meter (2,000-foot) fissure, and also produced lava fountains that built several hills of bubble-filled lava rocks (scoria) along the vent.
The Nabro volcano has not erupted in recorded human history, but lava flows near the volcano are relatively recent geologically.
It is believed there may be many different formation mechanisms including ancient magma flows and the collapse of subterranean lava tubes.
The volcano spewed molten lava.
A 25-kilometre-long fissure erupted 12 km3 of lava over the course of seven months.
With a hiss of steam, lava flows into the Pacific Ocean in Hawaii Volcanoes National Park, Hawaii.
The volcano spurted (out) molten lava.
Magma can erupt to the surface and form lava flows through the volcano's summit (frequently forming a crater), but it can also erupt from lava domes and flank vents along the volcano's sides.
The current stratovolcano-a cone-shaped volcano built from successive layers of thick lava flows and eruption products like ash and rock fragments-is built on top of an older stratovolcano.
In a National Geographic file photo from 2002, a scientist in a full thermal suit collects lava atop Mount Etna.
Here, extreme temperatures and pressures force lava up through the layers of the Earth in tubes criss-crossing the mantle like a sort of chaotic plumbing for lava.
That volcano cast forth lots of lava and ashes.
Runny lava flowed down its steep sides at rates of nearly 100 km per hour, quickly draining the lake.
Bromo is a grey stack but less menacing than I had expected and going up the powdery lava runs ranks as one of the best rides of my life.
A geyser of lava erupted, dropping molten rock on one of the outrigger collection arms of the facility where Obi-Wan and Vader dueled.
