• Thumbnail for Ordovician
    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
  • Thumbnail for Late Ordovician mass extinction
    Cap Late D O–S The Late Ordovician mass extinction (LOME), sometimes known as the end-Ordovician mass extinction or the Ordovician-Silurian extinction, is...
    99 KB (10,813 words) - 04:55, 17 February 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
  • Thumbnail for Cambrian–Ordovician extinction event
    K–Pg Tr–J P–Tr Cap Late D O–S The Cambrian–Ordovician extinction event, also known as the Cambrian-Ordovician boundary event, was an extinction event that...
    7 KB (793 words) - 07:29, 13 February 2024
  • Thumbnail for Trilobite
    appearing in the Ordovician include: Cyclopyge (Early to Late Ordovician) Selenopeltis (Early to Late Ordovician) Parabolina (Early Ordovician) Cheirurus (Middle...
    109 KB (11,684 words) - 10:49, 21 March 2024
  • subdivided into six geologic periods (from oldest to youngest): Cambrian Ordovician Silurian Devonian Carboniferous Permian Some geological timescales divide...
    35 KB (3,684 words) - 00:35, 12 March 2024
  • Thumbnail for Silurian
    geologic period and system spanning 24.6 million years from the end of the Ordovician Period, at 443.8 million years ago (Mya), to the beginning of the Devonian...
    56 KB (5,601 words) - 03:22, 19 March 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
  • 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
  • Thumbnail for Cambrian
    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) - 11:31, 16 March 2024