bioclastic rock

bioclastic rock

[¦bī·ō¦klas·tik ′räk]
(petrology)
Rock formed from material broken or arranged by animals, humans, or sometimes plants; a rock composed of broken calcareous remains of organisms.
References in periodicals archive ?
The number of specimens in the sample from the bioclastic rock exceeds that from the mudstone sample by almost 20 times.
In the M-1 and M-2 wells, the rocks located in the bottom are composed of intercalations of bioclastic rocks (biocalcarenite, intracalcarenite, calcarenite) and fine-grained calcareous rocks (calcareous shale, mudstones and micrites), (middle Eocene), and have a thickness of 518 m to 883 m.
Sequence 2 (O1--Mioc): in the upper part of the sequence, bioclastic rocks (biocalcarenite, intracalcarenite and calcarenite) are predominant.