Late Ordovician - Wikipedia
A map of Earth as it appeared 450 million years ago during the Late Ordovician Epoch, Katian Age
Atlas of Silurian and Middle-Late Ordovician Paleogeographic Maps …
2014年5月24日 · This Atlas of Silurian and Middle-Late Ordovician Paleogeographic Maps shows the changing paleogeography from the Middle Ordovician (Darwillian, 464.5 Ma) to the Late Silurian (Ludlow &...
Ordovician Period | Major Events, Extinction, & Facts | Britannica
2024年10月31日 · The Ordovician is divided into three epochs: Early Ordovician (485.4 million to 470 million years ago), Middle Ordovician (470 million to 458.4 million years ago), and Late Ordovician (458.4 million to 443.8 million years ago). During the Ordovician Period, four major continents were present and separated by three major oceans.
Paleogeographic map of the Late Ordovician (ca. 450 Ma) …
Paleogeographic map of the Late Ordovician (ca. 450 Ma) centered on Laurentia (modi fi ed from Ron Blakey, ∼ rcb7/namO450.jpg). The study area in the west shows tropical, shallow-marine...
Ordovician plate tectonic and palaeogeographical maps
2023年2月28日 · Plate tectonic and palaeogeographical maps are presented for nine time intervals during the Ordovician: early Tremadocian (485 Ma), late Tremadocian (480 Ma), early Floian (475 Ma), earliest Dapingian (470 Ma), early Darriwilian (465 Ma), late Darriwilian (460 Ma), middle Sandbian (455 Ma), middle Katian (450 Ma) and early Hirnantian (445 Ma).
1: World map of paleocontinent positions during the Late Ordovician ...
The Late Ordovician-Early Silurian period witnessed the second largest Phanerozoic mass extinction, Hirnantian glaciation and volcanic events.
Ordovician Plate Tectonic and Paleogeographic Maps
2023年1月16日 · Plate tectonic and paleogeographic maps are presented for nine time intervals during the Ordovician: early Tremadocian (485 Ma), late Tremadocian (480 Ma), early Floian (475 Ma), earliest Dapingian (470 Ma), early Darriwilian (465 Ma), late Darriwilian (460 Ma), middle Sandbian (455 Ma), middle Katian (450 Ma), and early Hirnantian (445 Ma).
Late Ordovician Mass Extinction: Earth, fire and ice
2023年12月18日 · The Late Ordovician Mass Extinction was the earliest of the ‘big’ five extinction events and the earliest to affect the trajectory of metazoan life. Two phases have been identified near the start of the Hirnantian period and in the middle.
Ordovician plate tectonic and paleogeographic maps
2023年1月11日 · The maps also show the location of active plate boundaries (i.e., subduction zones, mid-ocean rifts, transform faults, island arcs, back-arc basins and collision zones) and the age of the ocean floor.
Atlas of Silurian and Middle-Late Ordovician Paleogeographic Maps
This Atlas of Silurian and Middle-Late Ordovician Paleogeographic Maps shows the changing paleogeography from the Middle Ordovician (Darwillian, 464.5 Ma) to the Late Silurian (Ludlow & Prodoli, 419.5 Ma). The maps are from volume 5 of the PALEOMAP PaleoAtlas for ArcGIS (Scotese, 2014).