* Andesite: A light-colored, fine-grained igneous rock that is formed from the rapid cooling of lava on the Earth's surface.
* Rhyolite: A light-colored, fine-grained igneous rock that is formed from the rapid cooling of lava on the Earth's surface.
* Obsidian: A black, glassy igneous rock that is formed from the rapid cooling of lava on the Earth's surface.
* Pumice: A light-colored, porous igneous rock that is formed from the rapid cooling of lava on the Earth's surface.
* Scoria: A dark-colored, vesicular igneous rock that is formed from the rapid cooling of lava on the Earth's surface.
