Holwell Quarries

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Holwell Quarries (grid reference ST726450) is a 1.3 hectare geological Site of Special Scientific Interest 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.

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Geological Sites of Special Scientific Interest in Somerset
Summarised data for all sites (biological and geological)

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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