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 ...

These are formed when either igneous or sedimentary rocks are changed. Heat and/or pressure will cause the elements in the original rock to react and re-form. Metamorphic rocks are highly ...

A DISCUSSION on the origin of igneous rocks was held in Section C (Geology ... In certain continental regions the sedimentary and granitic layers appear to be separated from a deeper ‘basaltic ...

"We're constantly finding new minerals, because we're exploring areas that might have conditions we didn't know about," Anderson said. There are three main types of rock — igneous, sedimentary and ...