Britannica
Sources used in this answer
Which Ordovician stages belong to the Late Ordovician Epoch?
Created from Britannica articles
using AI.
AI can make mistakes, so verify using Britannica articles.
Ordovician Period
The distribution of landmasses, mountainous regions, shallow seas, and deep ocean basins during the Ordovician Period. Included in the paleogeographic reconstruction are the locations of the interval's subduction zones.
The Late Ordovician Epoch is divided into three internationally recognized stages. These stages, which span from 458.4 million to 443.8 million years ago, are as follows:1
- Sandbian Stage (Stage 5)
- Katian Stage (Stage 6)
- Hirnantian Stage (Stage 7)1