human
What are the three types of rocks?
assistant
The three main types of rocks are sedimentary, igneous and metamorphic. Sedimentary rocks are made up of layers of sandstone, limestone, shale, or other minerals that have been deposited by water over time. Igneous rocks are formed when molten magma cools and solidifies in a variety of shapes and textures. Metamorphic rocks are rocks that have been changed from one type to another due to intense heat and pressure.