More generally, it is any rock below sedimentary rocks or sedimentary basins that are metamorphic or igneous in origin. In the same way the sediments and/or sedimentary rocks on top of the basement can be called a "cover" or "sedimentary cover".
References[change | change source]
- Kearey, Philip 2001. The new Penguin dictionary of geology. 2nd ed, London: Penguin. ISBN 0-14-051494-5