• Thumbnail for Arenig
    Arenig (redirect from Arenig series)
    here that the "Llanvirn" Series of H. Hicks was equivalent to the bifidus[clarification needed] shale and the Lower Llandeilo Series. In the geologic...
    18 KB (1,271 words) - 09:43, 29 October 2023
  • Thumbnail for Ordovician
    Ordovician (redirect from Llanvirn)
    (Caradoc) Chazy (Llandeilo) Llandeilo (Llandeilo) Whiterock (Llanvirn) Llanvirn (Llanvirn) "Early Ordovician" Cassinian (Arenig) Arenig/Jefferson/Castleman...
    69 KB (7,298 words) - 05:51, 18 March 2024
  • interest for strata. The exposed rocks include the Arenig and overlying Llanvirn series. National nature reserves in Wales List of Ramsar sites in Wales Countryside...
    3 KB (218 words) - 17:23, 31 May 2021
  • Thumbnail for Fishguard and Goodwick
    protection because of its notable Ordovician pillow lava, in which the Llanvirn series is well demonstrated. Many of the rocks of Pembrokeshire have their...
    21 KB (2,227 words) - 12:31, 17 May 2023
  • Llanfawr Mudstones Formation, Builth inlier, Llandeilian Stage of the Llanvirn Series) and the Czech Republic (Dobrotiva Formation, near Svatá Dobrotivá...
    3 KB (170 words) - 05:37, 23 November 2023
  • Thumbnail for Han (trilobite)
    The type specimen of H. solo was found in marine strata of the Arenig to Llanvirn-aged Zitai Formation of Middle Ordovician southern China, and is named...
    3 KB (318 words) - 17:29, 20 December 2023
  • Thumbnail for Spore
    evidence of plant life on land, dating from the mid-Ordovician (early Llanvirn, ~470 million years ago), a period from which no macrofossils have yet...
    24 KB (2,042 words) - 18:05, 24 March 2024
  • Thumbnail for Rhynchonelliformea
    Rhynchonelliformea (category Cambrian Series 2 first appearances)
    Ordovician (Hirnantian)] Order †Orthotetida [Lower–Middle Ordovician ("Llanvirn") – Upper Permian] Order †Productida [Upper Ordovician – Lower Triassic...
    14 KB (1,519 words) - 13:13, 17 January 2024
  • Scientific Interest (or SSSI) in Anglesey, North Wales, for its exposures of Llanvirn (Ordovician) rocks. It has been designated as a Site of Special Scientific...
    3 KB (212 words) - 02:36, 20 January 2024
  • Thumbnail for Pricyclopyge
    development can be seen as a consecutive series of subspecies collected from successive zones in the late Arenig to the Llanvirn. This development improves the...
    6 KB (599 words) - 05:41, 23 November 2023