Holwell Quarries
Geological Site of Special Scientific Interest in Somerset, England
51°12′13″N 2°23′37″W / 51.20355°N 2.39357°W / 51.20355; -2.39357
Holwell Quarries (grid reference ST726450) is a 1.3-hectare (3.2-acre) geological Site of Special Scientific Interest at Holwell near Nunney on the Mendip Hills in Somerset, notified in 1952.
Holwell Quarries represent an internationally important geological locality. A comprehensive assemblage of Triassic (including Rhaetic), Lower Jurassic and Middle Jurassic fissure fillings are well displayed. The Rhaetic fissure fillings have yielded the richest assemblage of vertebrate faunas known from the British Triassic. Fissure deposits have also yielded 8 or 9 genera of Reptiles: a Crocodilian, a Placodont (the first record in Britain of this sub-order), and the dinosaurs Thecodontosaurus and Palaeosaurus. The Lower Jurassic fissure fillings yield ammonites and brachiopods which are important in dating these deposits.
See also
Sources
- English Nature citation sheet for the site (accessed 10 August 2006)
External links
- English Nature website (SSSI information)
- v
- t
- e
- Ashwick
- Axbridge
- Banwell
- Bishop Sutton
- Blagdon
- Bleadon
- Burrington
- Charterhouse
- Cheddar
- Chewton Mendip
- Churchill
- Compton Bishop
- Compton Martin
- Cross
- Draycott
- East Harptree
- Easton
- Hinton Blewett
- Hutton
- Leigh-on-Mendip
- Litton
- Oakhill
- Priddy
- Rodney Stoke
- Rowberrow
- Sandford
- Shepton Mallet
- Shipham
- Ubley
- Webbington
- Wells
- West Harptree
- Westbury-sub-Mendip
- Winscombe
- Wookey Hole
- Attborough Swallet
- Aveline's Hole
- Axbridge Ochre Mine
- Banwell Caves
- Banwell Ochre Caves
- Burrington Combe
- Charterhouse Cave
- Cheddar Gorge
- Compton Martin Ochre Mine
- Cox's Cave
- Eastwater Cavern
- Ebbor Gorge
- Fairy Cave Quarry
- GB Cave
- Goatchurch Cavern
- Gough's Cave
- Hunter's Hole
- Lamb Leer
- Longwood Swallet
- Manor Farm Swallet
- Picken's Hole
- Pierre's Pot
- Priddy Caves
- Read's Cavern
- Reservoir Hole
- Rhino Rift
- Rod's Pot
- Shatter Cave
- Shute Shelve Cavern
- Sidcot Swallet
- St Cuthbert's Swallet
- St. Dunstan's Well Catchment
- Stoke Lane Slocker
- Swildon's Hole
- Thrupe Lane Swallet
- Tyning's Barrow Swallet
- Upper Flood Swallet
- W/L Cave
- Wookey Hole Caves
- Asham Wood
- Axbridge Hill and Fry's Hill
- Banwell Caves
- Banwell Ochre Caves
- Barns Batch Spinney
- Blagdon Lake
- Bleadon Hill
- Brimble Pit and Cross Swallet Basins
- Burledge Hill
- Burrington Combe
- Chancellor's Farm
- Cheddar Complex
- Cheddar Reservoir
- Cheddar Wood
- Chew Valley Lake
- Cloford Quarry
- Compton Martin Ochre Mine
- Cook's Wood Quarry
- Crook Peak to Shute Shelve Hill
- Dolebury Warren
- Draycott Sleights
- Ebbor Gorge
- Emborough Quarries
- Harptree Combe
- Hobbs Quarry
- Holwell Quarries
- Kingdown and Middledown
- Lamb Leer
- Priddy Caves
- Priddy Pools
- Perch
- Rodney Stoke
- St. Dunstan's Well Catchment
- Sandpit Hole and Bishop's Lot
- Shiplate Slait
- Viaduct Quarry
- Windsor Hill Quarry
- Wurt Pit and Devil's Punchbowl
