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, following the Cambrian Period, and ended 443.8 million years ago, when the Silurian Period began. Ordovician rocks have the distinction of occurring at the highest elevation on Earth—the top of Mount Everest.
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 Earth – Colonising a Barren Land - Earthly Universe
WEBDec 2, 2016 · During the preceding Cambrian Period, the main landmasses had come together in the south of the map, forming the polar supercontinent of Gondwana, a vast rocky desert, while the northern hemisphere remained almost entirely covered by …
Ordovician plate tectonic and palaeogeographical maps
WEBFeb 28, 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 ...
Ordovician Period Information and Facts - National Geographic
WEBLearn about Earth's Ordovician period, which ended in the greatest Mass Extinction of all time.
Ordovician - scotese.com
WEBDuring the Ordovician ancient oceans separated the barren continents of Laurentia, Baltica, Siberia and Gondwana. The end of the Ordovician was one of the coldest times in Earth history. Ice covered much of the southern region of Gondwana.
Ordovician period - Geology Page
WEBMar 2, 2014 · The Ordovician /ɔrdəˈvɪʃən/ is a geologic period and system, the second of six of the Paleozoic Era, and covers the time between 485.4 ± 1.9 to 443.4 ± 1.5 million years ago (ICS, 2004). It follows the Cambrian Period and is followed by the Silurian Period.
Ordovician Period—485.4 to 443.8 MYA - U.S. National Park Service
WEBApr 28, 2023 · Date range: 485.4 million years ago to 443.8 million years ago. Length: 41.6 million years (0.92% of geologic time) Geologic calendar: November 23 (Noon)–November 26 (7 PM) (3 days, 7 hours) Ordovician age fossil brachiopods, Mississippi National River and Recreation Area, Minnesota. NPS image.