Holwell Quarries

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
Site of Special Scientific Interest

Location within Somerset
Location	Somerset
Grid reference	ST726450
Coordinates	51.20355°N 2.39357°W / 51.20355; -2.39357
Interest	Geological
Area	1.3 hectares (0.013 km²; 0.0050 sq mi)
Notification	1952 (1952)
Natural England website

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.

Sources

English Nature citation sheet for the site (accessed 10 August 2006)

External links

English Nature website (SSSI information)

Mendip Hills
Settlements	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
Rivers and lakes	River Axe Cheddar Yeo River Chew River Yeo Lox Yeo River Blagdon Lake Cheddar Reservoir Chew Valley Lake Litton Reservoirs
Hills	Axbridge Hill Black Down Bleadon Hill Burledge Hill Crook Peak Fry's Hill Pen Hill Purn Hill Shute Shelve Hill Wavering Down
Caves and gorges	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
Quarries	Batts Combe Callow Rock Cloford Cloud Colemans Cook's Wood Doulting Stone Dulcote Emborough Fairy Cave Gurney Slade Halecombe Hobbs Holwell Moon's Hill Torr Works Viaduct Whatley Windsor Hill
SSSIs	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
History	Priddy Circles Cheddar Man Drove Cottage Henge Dolebury Warren Charterhouse Roman Town Fosse Way King John's Hunting Lodge, Axbridge Priddy Mineries Somerset Coalfield Somerset Coal Canal Cheddar Valley line East Somerset Railway
Transport	Mendip Rail Mendip Way Monarch's Way National Cycle Route 24 A37 road A39 road A368 road A371 road
Councils	Bath and North East Somerset North Somerset Somerset
Surrounding areas	Chew Valley Somerset Levels North Somerset Levels

Geological Sites of Special Scientific Interest in Somerset
Summary	Summarised data for all sites (biological and geological)
SSSIs	Ben Knowle Blue Anchor to Lilstock Coast Brean Down Brimble Pit and Cross Swallet Basins Bruton Railway Cutting Cheddar Complex Cloford Quarry Cook's Wood Quarry Crook Peak to Shute Shelve Hill Doulting Railway Cutting Emborough Quarries Glenthorne Godminster Lane Quarry and Railway Cutting Greylake Ham Hill Hobbs Quarry Holwell Quarries Hurcott Farm Hurcott Lane Cutting Lamb Leer Langport Railway Cutting Laycock Railway Cutting Leighton Road Cutting Low Ham Maes Down Maesbury Railway Cutting Miller's Hill, Milborne Wick Moon's Hill Quarry Priddy Caves Priddy Pools Rodney Stoke SSSI Sandpit Hole and Bishop's Lot Seavington St Mary Shepton Montague Railway Cutting Snowdon Hill Quarry St. Dunstan's Well Catchment Thrupe Lane Swallet Vallis Vale Viaduct Quarry Windsor Hill Quarry Wookey Hole Wookey Station Wurt Pit and Devil's Punchbowl
Neighbouring areas	Avon Devon Dorset Wiltshire

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Holwell Quarries

See also

Sources

External links