Gileshiya (Tsaunin kankara)

Gileishiya ( US : / ɡ l eɪ ʃ ər / ko UK : / ɡ l æ s i ər, Ɡ l eɪ s i ər / ) ne m jikin m kankara cewa ne kullum motsi ƙarƙashin da kansa nauyi. Dusar ƙanƙara ta kan fito inda tarin dusar ƙanƙara ta wuce zubar da ciki a cikin shekaru da yawa, galibi ƙarnuka. Gileshiya sannu a hankali suna lalacewa kuma suna gudana ƙarƙashin matsin lamba wanda nauyin su ya haifar, suna ƙirƙirar crevasses, seracs, da sauran fasali masu rarrabewa. Suna kuma lalata dutsen da tarkace daga matattarar su don ƙirƙirar tsarin ƙasa kamar cirques, moraines, ko fjords. Gileshiya suna samuwa ne kawai a ƙasa kuma sun bambanta da kankara mai ƙanƙantar da kankara da ƙanƙarar tafkin da ke samuwa a saman ruwa.

Kaso 99% na duniya ya kunshi tsaunukan kankarar na gileshiya wanda ya zarce har a cikin sararin kankara zanen gado (wanda kuma aka sani da suna "nahiyar gileshiya") a cikin iyakacin duniya yankuna, amma glaciers za a iya samu a dutsen jeri a kan kowane nahiyar wasu fiye da Australian ɓangaren duniya ciki har da Oceania ta high-latitud Oceanic tsibirin kasashe irin su New Zealand. Tsakanin latitude 35 ° N da 35 ° S, kankara kan faru ne kawai a cikin Himalayas, Andes, da wasu manyan tsaunuka a Gabashin Afirka, Mexico, New Guinea da kan Zard Kuh a Iran.

Asalin kalma

Kalmar gileshiya kalma ce ta aro daga Faransanci kuma tana komawa, ta hanyar Franco-Provençal, zuwa Vulgar Latin glaciārium, Ya samo asali daga Late Latin glacia , kuma a ƙarshe Latin glaciēs, ma'ana "kankara".  Hanyoyi da fasalulluka da suka haifar ko kuma suka danganci kankara an kira su glacial. Tsarin kafa kankara, girma da kwarara ana kiransa glaciation . Yankin binciken daidai ana kiransa glaciology. Gileshiya sune mahimman abubuwan da ke cikin cryosphere na duniya.