Koguna na tsaunukan Mendip

An kafa kogon dutsen Mendip ta musamman ta fannin ilimin kasa na tudun Mendip : manyan wuraren dutsen da ruwa ke sawa ya sa ya zama cibiyar kogo ta ƙasa. Tuddan sun boye tsarin kogin karkashin kasa mafi girma a Biritaniya. 

 Geology 
Tuddan sun ƙunshi antiline na Carboniferous Limestone kwance a kan Devonian Old Red Sandstone, tare da yashi da aka fallasa a kan koli. Lokacin da rafin saman da ke gudana daga dutsen yashi ya kai ga dutsen farar ƙasa sai ya nutse a ƙasa ta hanyar " swallet ", (wanda kuma aka sani da shi a gida a matsayin "slocker"), yana ci gaba da kan hanyarsa zuwa matakin teku ta hanyar faɗaɗa tsagewar da ke cikin dutsen don samar da kogo, kuma yana sake bayyana a gindin dutsen farar ƙasa. Yayin da ruwan ke canza hanya a cikin tudun wasu kogo (ko sassan kogon) an bar su bushe. 
alt=Dark brown cave interior with water. A white vertically hanging stalagmite shown above a brown mound on the cave floor.|left|thumb|Stalagmites da stalactites a cikin Gough's Cave
Akwai nau'in siffar kogon Mendip, wanda a cikinsa akwai gangara mai gangarewa ta farko, sa'an nan kuma wani matakin shimfidawa yana ƙarewa a cikin " sump " yayin da kogon ya kai kuma ya gangaro ƙasan teburin ruwa . Wuraren da ke ƙarƙashin teburin ruwa (waɗanda za a iya samun su ta hanyar nutsewar kogo) sau da yawa suna samun tsarin madauki sakamakon ruwan da ke gangarowa daga jirgin saman kwanciya sannan ya tashi karaya a cikin dutsen.  Kadan daga cikin kogo a Dutsen Mendip sun fi  zurfi ko ƴan kilomitoci a tsayi,  (tare da wasu sanannun keɓanta, kamar Swildon's Hole wanda ya wuce  dogo  ), amma adadi yana da sarƙaƙiya tare da matakai da yawa waɗanda ruwa ya yi watsi da su, misali waɗanda ke kusa da Cheddar . 

Yankin da ake kamawa na Cheddar Yeo, wanda ya tashi a cikin kogon Gough, yana da ma'auni    . Rini ya nuna cewa wasu daga cikin ruwan suna tafiya ƙarƙashin ƙasa har zuwa , yana ɗaukar kwanaki 14 don isa Cheddar .

 Tarihi 
Lokacin da aka gano kogon Banwell Bone a shekara ta 1824, an gano cewa yana ɗauke da ƙasusuwan dabbobi masu yawa waɗanda aka rubuta kimanin shekaru 80,000. 

An gano farkon makabartar ɗan adam a kimiyyance a cikin Aveline's Hole, a Burrington Combe . Rukunin kasusuwan ɗan adam da ke cikinsa, daga kusan mutane 21 daban-daban, ana tsammanin suna tsakanin shekaru 10,200 zuwa 10,400.  

Shaidar archaeological ciki har da tukwane, flints, hearths, tsabar kudi, binnewa da aikin ƙarfe daga Mesolithic, Neolithic, Bronze Age, Iron Age da zamanin Roman an samo su a yawancin kogo.   Masu hakar ma'adinai sun gano wasu kogon Mendip, misali Banwell Caves wanda masu hakar ma'adinan ocher suka bude a 1757. "Mendip Caves: Western Mendip". British Geological Survey. 2008. Retrieved 6 February 2009.

Yawancin kogo a yankin Mendip kogon Harry Savory ya dauki hotonsa a farkon karni na 20 ta amfani da manyan kyamarori, faranti na gilashi da foda . An bayyana aikinsa a matsayin "... na inganci don kunyata kusan dukkanin masu daukar hoto na zamani". Littafin 1990 A Man Deep in Mendip: The Caving Diaries of Harry Savory, 1910-1921 yana ba da littafin diary wanda Harry Savory ya yi, wanda ɗansa John ya yi bayani kuma ya faɗa. Savory, H. and Savory, J. (1990) A Man Deep in Mendip: The Caving Diaries of Harry Savory, 1910-1921, Southern Illinois University Press, 

An gudanar da bincike da bincike da dama mai mahimmanci, tun daga shekarun 1920 zuwa gaba, ta kogon majagaba Herbert E. Balch . An rubuta kogon a cikin rajistar kogon Mendip da Taskar . 

 Shiga 
Kogon da ke da sauƙin isa ga jama'a suna a Cheddar Gorge da Wookey Hole, amma yawancin kogon suna buƙatar kayan aiki na ƙwararru da ilimi. Yawancin kogon suna kofa kuma suna aiki da tsarin jagora a ƙoƙarin rage barnar da ake yi lokacin da aka ziyarci kogon.  Ƙungiyoyin kogo na gida suna shirya tafiye-tafiye kuma suna ci gaba da gano sabbin kogo. Wasu ƙididdiga sun sanya adadin cavers da ke aiki a kan Mendip Hills a cikin karshen mako mai aiki fiye da 500. 

 Kogon ruwa 
Kokarin da aka yi a tsaunin Mendip na ratsawa daga wannan kogon zuwa wancan ta kogunan karkashin kasa ya haifar da ci gaban nutsewar kogo ; Kokarin nutsewar kogo na farko a Biritaniya ya faru ne a Swildon's Hole a cikin 1934. An samu nasarar nutsewar kogon kogon na farko a Biritaniya a shekara mai zuwa a Wookey Hole Caves, inda a halin yanzu babban taro ya kasance mafi zurfi a Burtaniya yana da  . 

 Shafukan da ke da sha'awar kimiyya ta musamman 
Rukunan kogon a Rijiyar St. Dunstan, Thrupe Lane Swallet, Lamb Leer da Priddy Caves an gano su azaman Wurin Geological na Sha'awar Kimiyya ta Musamman . Hakanan akwai kogo a cikin Cheddar Complex SSSI.

 Jerin kogwanni 
An jera zaɓi na sanannun kogwanni a ƙasa
NameLocationMapLength (km)Depth (m)NotesAttborough SwalletChewton MendipST561051810.2244Aveline's HoleBurrington CombeST476158670.06716Site of early cemetery & cave markingsAxbridge Ochre MineAxbridgeST4295520.13233Banwell CavesBanwellST382258810.09721geological Site of Special Scientific InterestBanwell Ochre CavesBanwellST40605904geological Site of Special Scientific InterestBos SwalletBurrington CombeST470958370.07637Bath SwalletBurrington CombeST472558450.07842Charterhouse CaveCharterhouseST477556204.868205Close, but not connected, to GB Cave. Deepest cave on the Mendip Hills.Compton Martin Ochre MineCompton MartinST5435660.421geological Site of Special Scientific InterestCox's CaveCheddarST464653900.118Open to the general public as a show caveDrunkard's HoleBurrington CombeST471458390.12748Eastwater CavernPriddyST538850622.8160One of the Priddy CavesEast Twin SwalletBurrington CombeST479558140.27438Fairy Cave Quarry *Balch Cave*Conning Tower Cave*Fairy Cave*Fernhill Cave *Hillier's Cave *Hillwithy Cave*Shatter Cave*W/L Cave*Withyhill CaveStoke St MichaelST656547751.17<60Many highly decorated.GB CaveCharterhouseST475956231.95134Part of the Cheddar Complex SSSI.Goatchurch CavernBurrington CombeST475858230.7555Very popular with novice caversGough's CaveCheddarST467053912.13590Open to the general public as a show caveHunter's HolePriddyST549250050.27558One of the Priddy CavesLamb LeerEast HarptreeST543255050.6467geological Site of Special Scientific InterestLongwood SwalletCharterhouseST486155711.65175Part of the Cheddar Complex SSSI.Manor Farm SwalletCharterhouseST498255661.06156Picken's HoleCompton BishopST3968055004Pierre's PotBurrington CombeST476358370.46533Read's CavernBurrington CombeST468258441.22462Reservoir HoleCheddarST47465447Length/depth to be confirmed following the recent discovery of what is believed to be the largest chamber under the Mendip Hills.Rhino RiftCharterhouseST484755570.25147Part of the Cheddar Complex SSSI.Rod's PotBurringtonST472158440.18845In September 2007, digging established a link through to nearby Bath SwalletSidcot SwalletBurringtonST475458280.228St Cuthbert's SwalletPriddyST543050506.7145One of the Priddy Caves. Most complex cave on Mendip.Stoke Lane SlockerStoke St MichaelST668747452.18<60Swildon's HolePriddyST531251319.15167One of the Priddy Caves. Longest cave on Mendip.Thrupe Lane SwalletShepton MalletST603845801.147120geological Site of Special Scientific InterestTyning's Barrow SwalletCheddarST471356381.29132Upper Flood SwalletCharterhouseST505755764.720136Wigmore SwalletPriddyST557152561.0110One of the Priddy Caves.Withybrook SlockerStoke St MichaelST655347150.2326Upstream part of caves in Fairy Cave QuarryWookey Hole CavesWookey HoleST531848023.66182Open to the general public as a show cave

 Manazarta 

Rukuni:Shafuka masu fassarorin da ba'a duba ba