Bourne SSSI, Avon
51°20′12″N 2°44′32″W / 51.33674°N 2.74210°W / 51.33674; -2.74210
Bourne SSSI, Avon (grid reference ST484600) is an 8.47 hectare geological Site of Special Scientific Interest near the village of Burrington, North Somerset, notified in 1992.
This site is of considerable importance because it has provided detailed information upon the composition of a north Mendip Pleistocene alluvial fan. An alluvial fan is a fan-shaped deposit formed where a fast flowing stream flattens, slows, and spreads typically at the exit of a canyon onto a flatter plain.
At Bourne sections have shown highly weathered gravels overlain by sandy silts and clay loams, the highest levels in the sequence showing evidence of cryoturbation. Two phases of fan sediment deposition were separated by a long period of subaerial weathering, which may represent an interglacial period.[1]
References
- ^ English Nature citation sheet for the site Archived October 13, 2006, at the Wayback Machine (accessed 9 July 2006)
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- Aust Cliff
- Avon Gorge
- Banwell Caves
- Banwell Ochre Caves
- Barnhill Quarry
- Barns Batch Spinney
- Bickley Wood
- Bleadon Hill
- Bourne
- Bowlditch Quarry
- Brinkmarsh Quarry
- Browne's Folly
- Buckover Road Cutting
- Burrington Combe
- Cattybrook Brickpit
- Clevedon Shore
- Compton Martin Ochre Mine
- Court Hill
- Cullimore's Quarry
- Damery Road Section
- Dundry Main Road South Quarry
- Gordano Valley
- Ham Green
- Hampton Rocks Cutting
- Hartcliff Rocks Quarry
- Hawkesbury Quarry
- Hinton Charterhouse Pit
- Hinton Hill, Wellow
- Holly Lane
- Huish Colliery Quarry
- Kenn Church, Kenn Pier & Yew Tree Farm
- Kilmersdon Road Quarry
- Lower Woods
- Lulsgate Quarry
- Middle Hope
- Newton St Loe
- Nightingale Valley
- North Road Quarry, Bath
- Portishead Pier to Black Nore
- Quarry Steps, Durdham Down
- Severn Estuary
- Slickstones Quarry, Cromhall
- Spring Cove Cliffs
- Stidham Farm
- Tytherington Quarry
- Weston-in-Gordano
- Winterbourne Railway Cutting
- Writhlington
- Neighbouring areas
- Gloucestershire
- Somerset
- Wiltshire