Glossary

Welcome to the glossary at GeologyRocks. We've put together some of the common terms used in the Earth Sciences to help you if you come across a term you've never seen before. To navigate, click a leeter or a category from the list on the left to see all the words starting with that letter or in that category. Alternatively, you can search for a word using the search box to the left. If you search for a word that isn't in our database, we will try and put in a definition as soon as we can.

If you come across a word we don't have in our glossary, please send it in.

Word of The Week: Neutral theory of molecular evolution

Predicts that alleles are fixed at a constant rate for a given gene over long periods and that most molecular variation is selectively neutral.

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