Spherical to ellipsoidal body which may or may not have a nucleus and has concentric or radial structure or both. Ooids are is usually calcareous, but may be siliceous, hematitic, or of other composition. A Sedimentary rock containing numerous ooid grains that are cemented together is called an oolite. See also Oolitic limestone.
Synonyms and Related Terms
oolith; oólito (Port.)
Physical and Chemical Properties
- Usually less than 2 mm in size
Resources and Citations
- José Delgado Rodrigues, LNEC, Submitted information 2009.