The characteristics of the rocks that hold fossils can be as informative as the fossils themselves. There are three main types of rock: igneous rock, metamorphic rock, and sedimentary rock. Almost all ...

Igneous rocks close igneous rockIgneous rocks are those which have been formed by the cooling and solidification of molten rock (magma) from underneath the earth’s crust. are formed by magma ...

How are fossils made? Discover what fossils are made ... What is a rock? Find out how igneous, metamorphic and sedimentary rocks are formed. What is the Earth? The Earth was formed 4.5 billion ...