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Nomenclature

Geology is full of classification systems and definitions. How do they decide when a geological period begins, and when it ends? How are oceans, mountains and continents defined?

Here are the questions you have sent in that we have answered. If you have a question you would a geologist to answer, email askageologist@geolsoc.org.uk. Click on the questions below to read the explanation given by one of our geologists.