Earth Heritage Glossary

Welcome to the CCW Earth heritage glossary index page. Over the next year or so, we will be adding more and more terms to the Earth Heritage glossary, and our other glossary chapters.

To find a specific glossary term, try entering the word into the main glossary search box in the right-hand column of the website.

Failing that, you can look for a term by browsing through the glossary index alphabetically, below.

Earth Heritage

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Glossary for letter: U

Unconformity: the surface of contact between two groups of strata which represents a break in the geological record during which there was a combination of no deposition and erosion.