View your list of saved words. (You can log in using Facebook.)
Coarse sedimentary rock consisting of angular or nearly angular fragments larger than 0.08 in. (2 mm). Breccia commonly results from processes such as landslides or geologic faulting, in which rocks are fractured. It can also be of igneous explosive origin (e.g., a volcanic breccia).
This entry comes from Encyclopædia Britannica Concise. For the full entry on breccia, visit Britannica.com.