The primary type of rock formed from molten magma is igneous rock. Igneous rocks originate when magma cools and solidifies, either below the Earth's surface (intrusive igneous rock) or on the surface following a volcanic eruption (extrusive igneous rock). Common examples of igneous rocks include granite, which is an intrusive rock formed from slow cooling beneath the surface, and basalt, which is an extrusive rock formed from rapid cooling at the surface. These rocks play a significant role in the rock cycle and can influence the geological landscape.