The three types of this material differ by their mineral and gas content; rhyolitic and andesitic types contain more silicon dioxide and are more viscous.
The three types of this material differ by their mineral and gas content; rhyolitic and andesitic types contain more silicon dioxide and are more viscous. The basaltic type is hottest, forms due to partial melting in the mantle, and flows fastest. Once any type reaches the planet's surface, it is known as lava. For 10 points, name the molten rock which forms beneath volcanoes.
The three types of this material differ by their mineral and gas content; rhyolitic and andesitic types contain more silicon dioxide and are more viscous.
{magma} [prompt on lava before it is mentioned]