Overburden is also used for all soil and ancillary material above the bedrock horizon in a given area.
By analogy, overburden is also used to describe the soil and other material that lies above a specific geologic feature, such as a buried astrobleme, or above an unexcavated site of archeological interest.
In particle physics, the overburden of an underground laboratory may be important to shield the facility from cosmic radiation that can interfere with experiments.
In arboriculture, the word is also used for the soil over the top of the roots of a tree collected from the wild.
The dictionary definition of overburden at Wiktionary
Kogel, Jessica Elzea (editor) (2006) Industrial minerals & rocks: commodities, markets, and uses (7th edition) Society for Mining, Metallurgy, and Exploration (U.S.), Littleton, Colorado, page 379, ISBN 0-87335-233-5 https://books.google.com/books?id=zNicdkuulE4C&pg=PA379 ↩
United States Bureau of Mines (1980) Selective Interburden Handling Techniques National Technical Information Service, Springfield, Virginia, OCLC 42983831 /wiki/OCLC_(identifier) ↩
Peng, Syd S. (1986) Coal Mine Ground Control (2nd edition), Wiley, New York, page 303, ISBN 0-471-82171-3 /wiki/ISBN_(identifier) ↩