Ebbor Gorge

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Ebbor Gorge
Site of Special Scientific Interest
EbborGorge.jpg
Ebbor Gorge is located in Somerset
Ebbor Gorge
Shown within Somerset
Area of Search Somerset
Grid reference ST525485
Coordinates 51°14′02″N 2°40′55″W / 51.234°N 2.682°W / 51.234; -2.682Coordinates: 51°14′02″N 2°40′55″W / 51.234°N 2.682°W / 51.234; -2.682
Interest Biological
Area 156.8 acres (0.635 km2)
Notification 1952
Natural England website

Ebbor Gorge is a limestone gorge in Somerset, England, close to Wells, designated as a 63.5-hectare (157-acre) biological Site of Special Scientific Interest in the Mendip Hills, notified in 1952. It is owned by the National Trust following a donation, and managed by Natural England as a National Nature Reserve.

The gorge was cut into the Clifton Down Limestone, and example of Carboniferous Limestone, by water. The floor of the gorge is impermeable Millstone Grit and Lower Coal Measures. The rare mineral Mendipite has also been found. The site was occupied by humans in the Neolithic Era and their tools and flint arrow heads have been discovered, along with pottery from the Bronze Age. There are also fossils of small mammals from the Late Devensian. A variety of flora and fauna, including flowers, butterflies and bats, are provided with a habitat within the nature reserve.

Geology[edit]

Ebbor Gorge lies on the southwest-facing slope of the Mendip Hills and consists of a steep-sided ravine cut into 350 million year old Carboniferous Limestone of the Dinantian. Specifically the gorge was cut into Clifton Down Limestone by meltwater in the Pleistocene Epoch.[1][2] The rocks of the area lie above a thrust fault formed during the Variscan orogeny.[3] Millstone Grit and Lower Coal Measures form an impermeable floor to this valley. An example of the rare mineral Mendipite was found at the head of the gorge.[4]

A stream issuing to the west of the site runs down the tributary valley of Hope Wood before joining the main gorge. The original watercourse which may have cut the gorge into the limestone became diverted underground and now emerges at Wookey Hole Caves to form the River Axe.[5]

History[edit]

Various caves within the gorge were inhabited by neolithic people from which flint tools are held in the Wells and Mendip Museum.[6][7][8] One fine flint flake among several found has been identified in the museum at King John's Hunting Lodge in Axbridge.[9]

Several caves occur within the Gorge, of which Bridged Pot and Gully Cave provide some of the best (presumed) Late Devensian small-mammal assemblages known from Britain. Most of the deposits remain in situ and include steppe pika, arctic lemming, Norway lemming, various voles, red deer and reindeer.[10][11][12][13] Bronze Age finds include pottery from the Beaker culture,[14] a stone axe and flint knife.[15]

Current use[edit]

Plaque at Ebbor Gorge commemorating the donation of the land

A 40-hectare (99-acre) area of the gorge is owned by the National Trust, and managed by Natural England as a National Nature Reserve.[16][17] The land was donated to the National Trust by Mrs G.W. Hodgkinson in memory of Winston Churchill.[18]

The site is close to Wookey Hole village and caves and offers views across the Somerset Levels to Glastonbury Tor and beyond. There are three marked trails of varying lengths around the steeply wooded gorge, the shortest of which is suitable for wheelchair users.[19]

Flora[edit]

The path into the gorge

The ground flora is indicative of the calcareous nature of the site, with Dog's Mercury (Mercurialis perennis) being locally dominant. Many of the associated species are characteristic of ancient woodland. Wood Anemone (Anemone nemorosa) and Common Bluebell (Hyacinthoides non-scripta) are both locally abundant. The valley of the main gorge is humid and provides ideal conditions for fungi and ferns. It contains a substantial assemblage of bryophytes with over 120 species recorded including the nationally rare Bryum canariense and the very rare Amblystegiella confervoides.[10]

Wildlife[edit]

The varied age and canopy structure of woodland encourages a high diversity of butterflies, nationally scarce species including the White-letter Hairstreak (Strymonidia walbum) and High Brown Fritillary (Argynnis edippe), while species such as the Chalkhill Blue (Lysandra coridon) and Brown Argus (Aricia agestis) occur on the limestone grassland.[20] Greater horseshoe bats (Rhinolophus ferrumequinum) and Lesser horseshoes (Rhinolophus hipposideros) regularly use sites in the Gorge as hibernacular roosts.[10] The site also supports birds of prey and a few Red deer.[21]

References[edit]

  1. ^ "Wookey Hole and Ebbor Gorge". British Geologucal Survey. Retrieved 22 December 2013. 
  2. ^ Donovan, D.T. (1988). "The late pleistocene sequence at Wells, Somerset" (PDF). Proceedings of the University of Bristol Speleological Society 18 (2): 241–257. 
  3. ^ Haslett, Simon K. (2010). Somerset Landscapes: Geology and landforms. Usk: Blackbarn Books. pp. 101–105. ISBN 978-1-4564-1631-7. 
  4. ^ Toulson, Shirley (1984). The Mendip Hills: A Threatened Landscape. Victor Gollanz Ltd. p. 32. ISBN 978-0-575-03453-2. 
  5. ^ Smith, David Ingle (1975). Limestone and Caves of the Mendip Hills. David & Charles. p. 120. ISBN 978-0-7153-6572-4. 
  6. ^ Lewis, Jodie (1998). "The Everton flint collection in Wells Museum" (PDF). Proceedings of the University of Bristol Speleological Society 21 (2): 141–148. 
  7. ^ Brown, Graham. "Dispersed settlements on the southern Mendip escarpment. The earthwork evidence" (PDF). Research Department Report Series no 72-2008. English Heritage. Retrieved 22 December 2013. 
  8. ^ "Ebbor Gorge NNR". Natural England. Retrieved 19 May 2014. 
  9. ^ Bond, Clive Jonathon (2013). "The later upper palaeolithic open sites and settlement trajectories. The evidence from the Mendip Hills, south-west Britain". Notae Praehistoricae 33: 179–192. 
  10. ^ a b c "Ebbor Gorge" (PDF). English Nature. Retrieved 22 December 2013. 
  11. ^ Papworth, Martin. "Deep Time in Ebbor Gorge". Archeology. National Trust. Retrieved 22 December 2013. 
  12. ^ "Wolves and wildcats: surviving the end of the last ice age in Somerset". Harrow and Hillingdon Geological Society. Retrieved 19 May 2014. 
  13. ^ "Learning & Leading Fieldwork Apprentices" (PDF). Royal Geographical Society. Retrieved 19 May 2014. 
  14. ^ Pot Shelter "Bridged Pot Shelter, Ebbor Gorge, Wookey, Somerset". A Gazetteer of English Caves, Fissures and Rock Shelters Containing Human Remains. University of Sheffield. Retrieved 22 December 2013. 
  15. ^ "Ebbor Gorge". Real Alternative. Retrieved 22 December 2013. 
  16. ^ "Ebbor Gorge NNR". Natural England. Retrieved 31 January 2010. 
  17. ^ "Things to see and do". National Trust. Retrieved 21 December 2013. 
  18. ^ Leete-Hodge, Lornie (1985). Curiosities of Somerset. Bodmin: Bossiney Books. p. 24. ISBN 0-906456-98-3. 
  19. ^ Toulson, Shirley (1984). The Mendip Hills: A Threatened Landscape. Victor Gollanz Ltd. pp. 128–129. ISBN 978-0-575-03453-2. 
  20. ^ "Ebbor Gorge". United Kingdom Butterfly Monitoring Scheme. Retrieved 19 May 2014. 
  21. ^ Toulson, Shirley (1984). The Mendip Hills: A Threatened Landscape. Victor Gollanz Ltd. p. 128. ISBN 978-0-575-03453-2. 

External links[edit]