causing them to change into another type of rock. They are usually resistant to weathering and erosion and are therefore very hard-wearing. Examples of metamorphic rocks include marble ...

A compound is a substance that contains two or more elements close elementA pure substance that is made from only one type of atom ... For example, the rock malachite is mostly made of the ...

There are over 5,000 known types of minerals. Just a few minerals make up most of the rocks we see, though: feldspars, amphiboles, quartz, olivine, garnet, micas, calcite, and pyroxenes.

This is a beginner's guide to identifying UK rock types. The guide has two main sections: background information on the structure and forces affecting the Earth in relation to rock formation a more ...