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. 

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. 

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. 

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

## Manazarta