The original rocks are usually sedimentary rocks or igneous rocks. Sometimes one metamorphic rock can be turned into a different metamorphic rock. There are three stages involved in the formation ...
The rocks on Earth are constantly changing due to many different processes ... together.Metamorphic rocks are formed from other rocks, igneous or sedimentary, which are heated and compressed ...
Volcanic rock is formed when lava or magma cools down and becomes a solid. We call this type of rock igneous rock. Here are three different types of igneous rock from the Museum’s collection.
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