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 letter 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 add it and gain yourself some points!

Here is an example word:

Porphyroblast

Unusually large crystal contained in a finer crystalline matrix occurring in metamorphic rocks. The resultant texture is a porphyroblastic texture.

Gneis with garnet porphyroblasts