Life continued to flourish during the Ordovician as it had in the earlier Cambrian Period, although the end of the period was marked by the Ordovician–Silurian extinction events.

Ordovician Period, in geologic time, the second period of the Paleozoic Era. It began 485.4 million years ago, following the Cambrian Period, and ended 443.8 million years ago, when the …

The Ordovician Period lasted almost 45 million years, beginning 488.3 million years ago and ending 443.7 million years ago.* During this period, the area north of the tropics was almost …

Apr 28, 2023 · Suffice it to say that a Welsh tribe—Ordovices—inspired the name of this geologic period. The Ordovician System rounded out the threefold division of early Paleozoic rocks (i.e., …

Aug 10, 2012 · The Ordovician* lasted about 45 million years and saw the transition from very primitive to relatively modern life-forms in the seas.

The Ordovician Period is usually broken into Early (Tremadoc and Arenig), Middle (Llanvirn, subdivided into Abereiddian and Llandeilian), and Late (Caradoc and Ashgill) epochs.

During the Ordovician period, part of the Paleozoic era, a rich variety of marine life flourished in the vast seas and the first primitive plants began to appear on land—before the second largest...

May 12, 2025 · The Ordovician is the second period of the Paleozoic Era (542-250 million years ago), preceded by the Cambrian and succeeded by the Silurian, Devonian, Carboniferous and …

Sep 8, 2025 · The Ordovician era, spanning from about 485.4 million to 443.8 million years ago, was an essential part of Earth's history. Distinguished by significant evolutionary diversification …

The Ordovician Period, spanning approximately 485.4 to 443.8 million years ago, represents the second segment of the Paleozoic Era. This geological interval was a time of significant …