What is the definition for igneous rocks made from lava?
Lava issues from volcanoes before solidifying, so the definition of igneous rock made from lava is “volcanic rock” or “extrusive rock.” Cooling above ground, lava solidifies quickly and forms minerals like basalt, which have a finer texture than rocks formed from magma, which solidifies slowly deep within the Earth.References:The Free Dictionary by Farlex: Volcanic RockGeology: What Is Basalt?The Franklin Institute: How Igneous Rock Is FormedTulane University: Magmas, Igneous Rocks, Volcanoes and PlutonsCalifornia State Polytechnic Institute of Pomona: Igneous Rock Identification