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The Early Ordovician is the first epoch of the Ordovician period, corresponding to the Lower Ordovician series of the Ordovician system. It began after the Age 10 of the Furongian epoch of the Cambrian and lasted from 486.85 to 471.3 million years ago, until the Dapingian age of the Middle Ordovician .
The Ordovician saw the highest sea levels of the Paleozoic, and the low relief of the continents led to many shelf deposits being formed under hundreds of metres of water. [41] The sea level rose more or less continuously throughout the Early Ordovician, leveling off somewhat during the middle of the period. [41]
Recent estimates (ICS and Cosuna) place the beginning of Gasconadian, and Ordovician, anywhere from about 488 to 500 million years ago, with a duration ranging from 9.7 to 10 million years respectively putting the end about 464 m.y.a. Both give estimates of over half the Early Ordovician. 60 percent according to the ICS, 2/3 according to Cosuna.
Biological taxa that first appeared during the Early Ordovician epoch of geologic time, between 485.4 and 470 million years ago. See also the preceding Category:Furongian first appearances and the succeeding Category:Middle Ordovician first appearances
This category includes biological taxa of rank more inclusive than genus that evolved during the Ordovician period of geologic time, between 485.4 and 443.8 million years ago, as well as genera and species that evolved during this time and persisted across multiple geological periods
Early Ordovician life (5 C, 1 P) F. Floian (14 P) L. Lower Ordovician Series (7 P) T. Tremadocian (19 P) Pages in category "Early Ordovician" The following 5 pages ...
Early Ordovician life (5 C, 1 P) F. Ordovician fossil record (3 C, 3 P) L. Late Ordovician life (3 C) M. Middle Ordovician life (4 C) P. Ordovician plants (6 P) T.
Early Ordovician species extinctions (1 P) F. Early Ordovician species first appearances (1 P) This page was last edited on 1 November 2023, at 21:48 (UTC). Text is ...