Ordovician - Wikipedia
WEBPaleogeographic map of the Earth in the middle Ordovician, 470 million years ago. During the Ordovician, the southern continents were assembled into Gondwana, which reached from north of the equator to the South Pole. The Panthalassic Ocean, centered in the northern hemisphere, covered over half the globe. [18]
Ordovician Period | Major Events, Extinction, & Facts
WEBAug 9, 2024 · Ordovician Period, in geologic time, the second period of the Paleozoic Era. It began 485.4 million years ago and ended 443.8 million years ago. The interval was a time of intense diversification (an increase in the number of species) of marine animal life in what became known as the Ordovician radiation.
Ordovician Period Information and Facts - National Geographic
WEBDuring 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...
A journey through the Ordovician System around the world
WEBMar 16, 2023 · From the Geological Map of the World (at a scale of 1:5M) (Sautter et al. 2022), the following data are available (Table 1): excluding Antarctica, 1.91–4.17% of the sedimentary rocks on the different continents are Ordovician in age.
Ordovician Earth – Colonising a Barren Land - Earthly Universe
WEBDec 2, 2016 · Highlights of the Ordovician. Massive evolutionary diversification; First primitive plants on the land; Evolution of nautiluses and other sea life; Highest sea levels ever recorded; Rapid glaciation towards the Silurian period; Ended with a major extinction event; A Tropical Ocean World
Ordovician Period - Natural History Museum
WEBAug 10, 2012 · Early Ordovician. These maps of major tectonic elements (plates, oceans, ridges, subduction zones, mountain belts) are used with permission from Dr. Ron Blakey at Northern Arizona University. The positions of mid-ocean ridges before 200 Ma are speculative. Explanation of map symbols.
Ordovician Period summary | Britannica
WEBOrdovician Period, Interval of geologic time, 485.4–443.4 million years ago, the second oldest period of the Paleozoic Era. It follows the Cambrian and precedes the Silurian Period. During the Ordovician, many of the landmasses were aligned in the tropics.
The Ordovician System: Key concepts, events and its distribution …
WEBMar 10, 2023 · During the last 25 years there have been many global maps reconstructed for the Phanerozoic using a variety of methodologies for their assembly. In a step change in reconstructing palaeogeography, Scotese (2023) presents maps for nine Ordovician time slices, illustrating the positions of mountain belts, …
Ordovician plate tectonic and palaeogeographical maps
WEBMay 10, 2023 · The maps show the locations 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.
Ordovician Plate Tectonic and Paleogeographic Maps
WEBJan 16, 2023 · 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 ...
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