Lava is the word for magma when it erupts onto the Earth's surface. Geologists also use the term to describe the solidified deposits of lava flows and fragments hurled into the air by explosive ...

The type of lava erupted by Nyiragongo and many volcanoes in the East Rift zone ... a large elongated fissure or fracture (as seen on the diagram above) or a tiny ground crack.

I’ve been asked by my fellow explorers to get some rock samples from Mount Vesuvius, but it’s an active volcano, so I’ll need to watch out for things like lava flow. Lava is very hot molten ...