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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–Silurian extinction events may have been caused by an ice age that occurred at the end of the Ordovician Period, due to the expansion of the first terrestrial plants, [54] as the end of the Late Ordovician was one of the coldest times in the last 600 million years of Earth's history.
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
The Ordovician Period of the Paleozoic Era, in the Phanerozoic Eon. This category contains events which happened in the Ordovician, a division of the geologic time scale. See geologic time scale for information about its divisions and how they relate to each other.
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 species first appearances (1 P) This page was last edited on 1 November 2023, at 21:48 (UTC). Text is available under the Creative Commons ...
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
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.