Fashewar Volkeno a kasar New Zealand

Duk da yake ƙasar ta volcanism kwanakin baya to kafin Zealandia microcontinent rifted daga Gondwana 60-130 kimanin shekaru miliyan da suka wuce, aikin ci gaba a yau tare da qananan eruptions faruwa a kowace 'yan shekaru.

Wannan aikin na baya-bayan nan ya samo asali ne saboda matsayin ƙasar a kan iyaka tsakanin Indo-Ostiraliya da faranti -Pacific, wani ɓangare na Wutar Wutar Pacific, musamman murƙushe Plate Plate a ƙarƙashin Tekun Indo-Australiya.

Dutsen kasar New Zealand ya yi rikodin misalai na kusan kowane irin dutsen mai fitad da wuta da aka gani a Duniya,  gami da wasu manyan fashewar abubuwa a duniya a lokutan  ƙasa.irin dutsen mai  fitad da wuta da aka gani a Duniya, gami da wasu manyan fashewar abubuwa a duniya a lokutan ƙasa.

Tarihin fashewa
 Manyan Fashewa 
New Zealand ta kasance wurin fashewar abubuwa masu fashewa da yawa a cikin shekaru miliyan biyu da suka gabata, gami da yawancin girman dutsen. Waɗannan sun haɗa da fashewa daga Tsibirin Macauley  da Taupo, Whakamaru, Mangakino, Reporoa, Rotorua, da Haroharo calderas.

Abubuwa biyu na baya-bayan  nan da suka fito daga dutsen dutsen Taupo wataƙila sune mafi sani. Fashewar Oruanui ita ce mafi  girma da aka sani a duniya a cikin shekaru 70,000 da suka gabata, tare da Index Volcanoic Index (VEI) na 8. Ya faru kusan shekaru 26,500 da suka gabata kuma ya ajiye kusan 1,200 km³ na kayan.Tephra daga fashewar ya rufe yawancin tsibirin  Arewacin Arewa tare da ƙonewa har zuwa mita 200 (650 ƙafa) mai zurfi, kuma galibin New Zealand sun lalace sakamakon toka, har ma da 18 cm (7 ku inch) Layen tokar da aka bari a Tsibirin Chatham, 1,000 kilometres (620 mi) tafi. Raguwar ƙasa da gurɓataccen iska yana da tasiri na dindindin a kan shimfidar wuri, wanda ya sa Kogin Waikato ya canza daga Filin Hauraki zuwa tafarkinsa na yanzu ta Waikato zuwa Tekun Tasman.  Babban tafkin New Zealand,  Taupo, ya cika tudun da  aka kafa a cikin wannan fashewar.

 Manazarta 

Category: New Zealand