1. ordovician - Noun
2. ordovician - Adjective
3. Ordovician - Proper noun
Of or pertaining to a division of the Silurian formation, corresponding in general to the Lower Silurian of most authors, exclusive of the Cambrian.
The Ordovician formation.
Source: Webster's dictionaryAn Upper Ordovician cobble with the edrioasteroid Cystaster stellatus and the thin branching cyclostome bryozoan Corynotrypa. Source: Internet
Biochemical sedimentary rocks Outcrop of Ordovician oil shale ( kukersite ), northern Estonia Biochemical sedimentary rocks are created when organisms use materials dissolved in air or water to build their tissue. Source: Internet
Bioimmuration is known in the fossil record from the Ordovician Wilson, MA, Palmer, T. J. and Taylor, P. D. (1994) Earliest preservation of soft-bodied fossils by epibiont bioimmuration: Upper Ordovician of Kentucky. Source: Internet
Bryozoans are among the three dominant groups of Paleozoic fossils. citation The oldest species with a mineralized skeleton occurs in the Lower Ordovician. Source: Internet
Bryozoans have contributed to carbonate sedimentation in marine life since the Ordovician period. Source: Internet
Charles Lapworth resolved the conflict by defining a new Ordovician system including the contested beds. Source: Internet