The Ordovician (/ɔːrdəˈvɪʃi.ən, -doʊ-, -ˈvɪʃən/ or-də-VISH-ee-ən, -doh-, -VISH-ən) is a geologic period and system, the second of six periods of the... 69 KB (7,298 words) - 05:51, 18 March 2024 |
The Late Ordovician, also called the Upper Ordovician by geologists, is the third epoch of the Ordovician period. At this time Western and Central Europe... 3 KB (267 words) - 16:17, 2 January 2024 |
Trilobite (section Ordovician) appearing in the Ordovician include: Cyclopyge (Early to Late Ordovician) Selenopeltis (Early to Late Ordovician) Parabolina (Early Ordovician) Cheirurus (Middle... 110 KB (11,754 words) - 17:47, 15 April 2024 |
The Great Ordovician Biodiversification Event (GOBE), was an evolutionary radiation of animal life throughout the Ordovician period, 40 million years after... 34 KB (3,551 words) - 05:15, 17 February 2024 |
Sacabambaspis (category Ordovician jawless fish) Sacabambaspis is an extinct genus of jawless fish that lived in the Ordovician period. Sacabambaspis lived in shallow waters on the continental margins... 9 KB (907 words) - 07:32, 25 April 2024 |
Paleozoic (section Ordovician Period) subdivided into six geologic periods (from oldest to youngest): Cambrian Ordovician Silurian Devonian Carboniferous Permian Some geological timescales divide... 35 KB (3,683 words) - 08:53, 7 April 2024 |
Andean-Saharan glaciation (redirect from Late Ordovician glaciation) Ice Age (EPIA), the Early Paleozoic Icehouse, the Late Ordovician glaciation, the end-Ordovician glaciation, or the Hirnantian glaciation, occurred during... 60 KB (6,565 words) - 11:30, 5 January 2024 |
Ediacaran period 538.8 million years ago (mya) to the beginning of the Ordovician period 485.4 mya. Its subdivisions, and its base, are somewhat in flux... 56 KB (5,536 words) - 12:31, 6 April 2024 |
The Ordovician meteor event was a dramatic increase in the rate at which L chondrite meteorites fell to Earth during the Middle Ordovician period, about... 7 KB (529 words) - 18:45, 23 August 2023 |
the Mexican amber by García-Villafuerte (2018). Redescription of the Ordovician malacostracan Wuningia multisegmenlata is published by Lin (2018). A member... 175 KB (9,235 words) - 08:52, 7 March 2024 |
Phanerozoic (section Ordovician Period) into the super-continent Gondwana. The Ordovician spans from 485 million to 444 million years ago. The Ordovician was a time in Earth's history in which... 59 KB (6,061 words) - 10:45, 19 April 2024 |
Knox Supergroup (category Ordovician geology of Pennsylvania) Southeastern United States. The age is from the Late Cambrian to the Early Ordovician. Predominantly, it is composed of carbonates, chiefly dolomite, with some... 15 KB (1,220 words) - 05:59, 31 March 2024 |
coast Ordovician genus, in prior times it was employed as a general name given to all straight-shelled nautiloids that lived from the Ordovician to the... 37 KB (3,449 words) - 06:02, 25 April 2024 |
Tremadocian (category Early Ordovician) Tremadocian is the lowest stage of Ordovician. Together with the later Floian Stage it forms the Lower Ordovician Epoch. The Tremadocian lasted from 485... 16 KB (1,413 words) - 14:25, 20 April 2024 |
short range in the Middle Ordovician period. If rocks of unknown age have traces of E. pseudoplanus, they have a mid-Ordovician age. Such index fossils... 104 KB (10,815 words) - 18:58, 26 April 2024 |
the Proterozoic Eon. Ordovician–Silurian extinction events (End Ordovician or O–S): 445–444 Ma, just prior to and at the Ordovician–Silurian transition... 143 KB (15,457 words) - 17:41, 22 April 2024 |
(Ordovician) Chlamydosphaeridia (Ordovician) Comasphaeridium (Ordovician) Coronitesta (Ordovician) Coryphidium (Ordovician) Costatilobus (Ordovician)... 18 KB (1,695 words) - 01:01, 17 April 2024 |
Geological history of Earth (section Ordovician period) Iapetus Ocean and Khanty Ocean. The Ordovician period started at a major extinction event called the Cambrian–Ordovician extinction event some time about... 49 KB (5,878 words) - 19:24, 28 February 2024 |
protozoa. They were thought to have appeared as early as the mid-late Ordovician period as an adaptation of early land plants. Bacterial spores are not... 24 KB (2,055 words) - 22:22, 20 April 2024 |
in the Middle Ordovician period. If rocks of unknown age are found to have traces of E. pseudoplanus, they must have a mid-Ordovician age. Such index... 102 KB (10,169 words) - 22:29, 9 April 2024 |
Cameroceras (category Ordovician cephalopods of North America) endocerid cephalopod which lived in equatorial oceans during the entire Ordovician period. Like other endocerids, it was an orthocone, meaning that its shell... 21 KB (1,574 words) - 23:04, 21 April 2024 |
Fezouata Formation (category Ordovician System of Africa) Fezouata Shale is a geological formation in Morocco which dates to the Early Ordovician. It was deposited in a marine environment, and is known for its exceptionally... 88 KB (4,480 words) - 07:47, 24 April 2024 |
Labechiida (section Ordovician) an extinct order of stromatoporoid sponges. They lived from the Early Ordovician (Floian stage) to the Late Devonian (Famennian stage), though a few putative... 18 KB (1,695 words) - 16:06, 31 January 2024 |