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- Llandovery_Group abstract "In geology, the Llandovery Group formerly referred to the lowest division of the Silurian period (Lower Silurian) in Britain. It was named after the town of Llandovery in Wales, although Charles Lapworth had proposed the name Valentian (from the Roman British province of Valentia) for this group in 1879. It included the Tarannon Shales (1000–1500 ft.), Upper Llandovery and May Hill Sandstone (800 ft.), Lower Llandovery, (600–1500 ft.)The Lower Llandovery rocks consist of conglomerates, sandstones and slaty beds. At Llandovery they rest upon Ordovician rocks. These rocks occur with a narrow crop in Pembrokeshire, which curves round through Llandovery, and in the Rhayader district they reach a considerable thickness. They also occur in Ceredigion and Carmarthenshire.The Upper Llandovery has local lenticular developments of shelly limestone (Norbury, Hollies and Pentamerus limestones). It occurs with a narrow outcrop in Carmarthenshire at the base of the Silurian, disappearing beneath the Old Red Sandstone westward to reappear in Pembrokeshire; north-eastward the outcrop extends to the Long Mynd, which the conglomerate wraps round. As it is followed along the crop it rests upon the Lower Llandovery, Caradog, Llandeilo, Cambrian and pre-Cambrian rocks. The fossils include the trilobites Phacops caudata, Encrinurus punctatus and Calymene blumenbachis; the brachiopods Pentamerus oblongus, Orthis calligramma and Atrypa reticularis; the corals Favosites and Lindostroemia; and the zonal graptolites Rastriles maximus and Monograptus spinigerus.The Tarannon shales, grey and blue slates, designated by Adam Sedgwick the Paste Rock, is traceable from Conwy into Carmarthenshire; in Ceredigion, there are gritty beds; and in the neighbourhood of Builth, soft dark shales. The group is poor in fossils, with the exception of graptolites; of these Cyrtograptus grayae and Monograptus exiguus are zonal forms. The Tarannon group is represented by the Rhayader Pale Shales in Powys; in the Moffat Silurian belt in south Scotland by a thick development, including the Hawick rocks and Ardwell Beds, and the Queensberry Group or Gala; in the Girvan area, by the Drumyork Flags, Bargany Group and Penkill Group; and in Ireland by the Treveshilly Shales of Strangford Lough, and the shales of Salterstown, Co. Louth.The Upper and Lower Llandovery rocks are represented in descending order by the Pale Shales, Graptolite Shales, Grey Slates and Corwen Grit of Meirionnydd and Denbighshire. In the Lake district the lower part of the Stockdale shales (Skelgill beds) is of Llandovery age. In the Girvan area to the north their place is taken by the Camregan, Shaugh Hill and Mullock Hill groups. In Ireland the Llandovery rocks are represented by the Anascaul Slates of the Dingle promontory, by the Owenduff and Gowlaun Grits, Co. Galway, by the Upper Pomeroy Beds, by the Uggool and Ballaghaderin Beds, Co. Mayo, and by rocks of this age in Coalpit Bay and Slieve Felim Mountains.Economic deposits in Llandovery rocks include slate pencils (Teesdale), building stone, flag-stone, road metal and lime.".
- Llandovery_Group wikiPageID "3624917".
- Llandovery_Group wikiPageLength "3542".
- Llandovery_Group wikiPageOutDegree "43".
- Llandovery_Group wikiPageRevisionID "688691766".
- Llandovery_Group wikiPageWikiLink Adam_Sedgwick.
- Llandovery_Group wikiPageWikiLink Ardwell.
- Llandovery_Group wikiPageWikiLink Brachiopod.
- Llandovery_Group wikiPageWikiLink Buellt.
- Llandovery_Group wikiPageWikiLink Cambrian.
- Llandovery_Group wikiPageWikiLink Carmarthenshire.
- Llandovery_Group wikiPageWikiLink Category:Lithostratigraphy_of_England.
- Llandovery_Group wikiPageWikiLink Category:Stratigraphy_of_the_United_Kingdom.
- Llandovery_Group wikiPageWikiLink Ceredigion.
- Llandovery_Group wikiPageWikiLink Charles_Lapworth.
- Llandovery_Group wikiPageWikiLink Conglomerate_(geology).
- Llandovery_Group wikiPageWikiLink Conwy.
- Llandovery_Group wikiPageWikiLink Coral.
- Llandovery_Group wikiPageWikiLink Denbighshire.
- Llandovery_Group wikiPageWikiLink Favosites.
- Llandovery_Group wikiPageWikiLink Geology.
- Llandovery_Group wikiPageWikiLink Girvan.
- Llandovery_Group wikiPageWikiLink Graptolithina.
- Llandovery_Group wikiPageWikiLink Great_Britain.
- Llandovery_Group wikiPageWikiLink Hawick.
- Llandovery_Group wikiPageWikiLink Ireland.
- Llandovery_Group wikiPageWikiLink Limestone.
- Llandovery_Group wikiPageWikiLink Llandeilo.
- Llandovery_Group wikiPageWikiLink Llandovery.
- Llandovery_Group wikiPageWikiLink Long_Mynd.
- Llandovery_Group wikiPageWikiLink Meirionnydd.
- Llandovery_Group wikiPageWikiLink Norbury.
- Llandovery_Group wikiPageWikiLink Ordovician.
- Llandovery_Group wikiPageWikiLink Pembrokeshire.
- Llandovery_Group wikiPageWikiLink Pentamerus.
- Llandovery_Group wikiPageWikiLink Powys.
- Llandovery_Group wikiPageWikiLink Rhayader.
- Llandovery_Group wikiPageWikiLink Sandstone.
- Llandovery_Group wikiPageWikiLink Scotland.
- Llandovery_Group wikiPageWikiLink Silurian.
- Llandovery_Group wikiPageWikiLink Slieve_Felim_Mountains.
- Llandovery_Group wikiPageWikiLink Strangford_Lough.
- Llandovery_Group wikiPageWikiLink Teesdale.
- Llandovery_Group wikiPageWikiLink Trilobite.
- Llandovery_Group wikiPageWikiLink Valentia_(Roman_Britain).
- Llandovery_Group wikiPageWikiLink Wales.
- Llandovery_Group wikiPageWikiLink Wikt:lenticular.
- Llandovery_Group wikiPageWikiLinkText "Llandovery Group".
- Llandovery_Group wikiPageWikiLinkText "Llandovery".
- Llandovery_Group wikiPageUsesTemplate Template:1911.
- Llandovery_Group subject Category:Lithostratigraphy_of_England.
- Llandovery_Group subject Category:Stratigraphy_of_the_United_Kingdom.
- Llandovery_Group comment "In geology, the Llandovery Group formerly referred to the lowest division of the Silurian period (Lower Silurian) in Britain. It was named after the town of Llandovery in Wales, although Charles Lapworth had proposed the name Valentian (from the Roman British province of Valentia) for this group in 1879.".
- Llandovery_Group label "Llandovery Group".
- Llandovery_Group sameAs Q6661226.
- Llandovery_Group sameAs Grŵp_Llanymddyfri.
- Llandovery_Group sameAs m.09qq60.
- Llandovery_Group sameAs Q6661226.
- Llandovery_Group wasDerivedFrom Llandovery_Group?oldid=688691766.
- Llandovery_Group isPrimaryTopicOf Llandovery_Group.