Only two people survived. There are three types of lava. They are pahoeho, AA and remelted. Pahoehoe has a folded ropelike surface. AA or blocky lava are sharp angular chunks of lava.
Remelted lava is droplets of lava from the roof of the tunnel.
Lava fragments which are small pieces of solidified lava are called lapillia. Volcanos in Space Volcanos are not only on earth but in space too. We have seen volcanos on moons and planets. Mars has four very old, huge volcanos. Our moon has extinct volcanos on it.