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 Locality areas
  Cheddar Gorge
 Charterhouse
 Blackdown
 Burrington Combe
 Shipham & Rowberrow
 Crook Peak & Axbridge
 Banwell to Churchill
 Priddy
 Harptree & Smitham Hill
 Draycott & Westbury-sub
 -Mendip
 Wookey Hole & Ebbor
 Gorge
 Wells
 Great Elm & Vallis Vale
 Mells & the Wadbury Valley
 The Vobster area
 The Whatley area
 Torr Works & Asham Wood
 Beacon Hill
 Stoke St Michael & Oakhill
 Holwell & Nunney
 Shepton Mallet & Maesbury
 Gurney Slade & Emborough
 The Nettlebridge valley
 Geology
 Rocks of Mendips
 Fossils
 Geological timescale
 Ancient environments
 Geological structure
 Minerals and mines
  Minerals and mines
 Industrial archaeology
 Quarrying
  Stone as a resource
 Employment & the economy
 Quarrying & geodiversity
 Quarrying & the environment
 History of quarrying
 Caves and karst
 How caves form
 Dry valleys and gorges
 Dolines and sinkholes
 Mendip caves
 Going caving
 Hydrogeology
 Biodiversity
  Flora and fauna
 Typical Mendip habitats
 Special Mendip habitats
 Horseshoe bats
 Appendix of names
 Biodiversity of western
 Mendip
 Biodiversity of eastern
 Mendip
 External links
 Detailed site information
  Coal mining
  Mendip quarry companies
  East Mendip quarries
 Biodiversity of eastern
 Mendip
  West Mendip quarries
 Biodiversity of western
 Mendip
 Acknowledgements
 Site map
The fossils of Mendip
Silurian | Upper Devonian | Lower Carboniferous | Triassic | Lower to Middle Jurassic

Silurian fossils (444 to 416 million years ago)

Silurian mudstones and tuffs
The Silurian rocks in the Mendips are relatively poor in fossils, their remains mainly occurring in the mudstone-rich lithologies at the base and in a bed of water-lain tuff (consolidated volcanic ash) present in the overlying volcanic succession. The fauna of the shales is dominated by brachiopods, including Isorthis clivosa, Salopina conservatrix, Protochonetes sp. and Eocoelia angelini, the record of the last named species allowing the base of the succession to be assigned to the lower Wenlock part of the Silurian. The fauna from the tuff includes bivalves and the brachiopods Lingula and Salopina conservatrix. Overall the brachiopod fauna suggests that a shallowing of the marine environment occurred near the base of the Silurian succession in the Mendips, perhaps related to local uplift associated with impending Silurian volcanism.

Lingula Salopina cf conservatrix

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