It changes into different rock from heat and pressure. Metamorphic rock is like melting an Oreo and then letting it harden. Marble is a metamorphic rock. The last kind of rock type is igneous. Igneous rocks are made from lava that hardens.
Igneous rocks are like glue that comes out of a tube and hardens.
Rocks and minerals are very old. There are a lot of rocks and minerals in the world. Go to the Science Poetry Main Menu . Go to the Ward Wide Web .