Dutsen Amak

Dutsen Amak wani basaltic andesite stratovolcano a cikin Aleutian Islands na Alaska, Amurka,  daga Anchorage .  Yana kan tsibirin da ake kira da suna,  daga Frosty Volcano kuma kusa da gefen yammacin gabar tekun Alaskan . Jiragen ruwa ne kawai aka yarda su shiga tsibirin tare da takamaiman izini.

Blocky (wanda aka ɗora tare da lebur tubalan na ma'adanai da lu'ulu'u) lava yana gudana  daga kololuwar sa zuwa gefensa. An yi fashewar fashewar tarihi guda uku - biyu a cikin karni na 18, na farko daga 1700 zuwa 1710, na karshen kuma a 1796. An yi imani da fashewar tarihi na farko tsakanin 3050 da 2050. BC

 Samun dama 
Cold Bay, birni mafi kusa Amak, ana samun sauƙin shiga ta jirgin sama. Ana samun damar Amak ta jirgin ruwa kawai; ba a yarda jiragen sama su sauka a tsibirin ba. Ana samun hawan jirgin ruwa masu zaman kansu zuwa Amak a cikin Cold Bay, amma don samun damar shiga tsibirin Aleutian, ana buƙatar izini daga Sabis na Kifi da Namun daji na Amurka . 

 Geography da Geology 
Tsibirin Amak yana cikin Tekun Bering, arewacin babban tsibiri na Aleutians. Yana ɗayan tsibiran guda biyu (tare da tsibirin Bogoslof ) waɗanda ke da  arewa  na babban kewayo. 

Amurka ce ke da tuhume-tuhumen masu aman wuta a duniya, yawancinsu matasa ne a fannin kasa.  A Alaska, akalla 50 volcanoes, ciki har da wadanda ke cikin tsibirin Aleutian, sun barke a lokacin tarihi.  Jihar tana lissafin ~ 80% na dutsen tsaunuka na Amurka, ban da tsaunukan teku a yankin, ~ 8% na dutsen mai aman wuta na duniya, kuma yawancin waɗannan suna cikin tsibiran Aleutian.  Tsibirin Aleutian arc yana aiki a matsayin iyakar arewa na Ring of Fire na Pacific,  inda ayyukan tectonic ke haifar da girgizar ƙasa da fashewar volcanic a cikin talakawa.

Dutsen mai aman wuta basaltic - andesitic a cikin abun da ke ciki.  Ƙarƙashin dutsen wuta ne,  yana tashi sama da  sama da matakin teku. "Amak description and statistics". Alaska Volcano Observatory. United States Geological Survey. Archived from the original on August 6, 2023. Retrieved July 6, 2009. Dutsen dutsen mai aman wuta ya bambanta, kuma ya barke a lokutan tarihi, kawai "toshe" lava yana gudana.  Charles Wood da Jürgen Kienle, masu binciken volcano, sun ba da shawarar cewa ayyukan da suka gabata, 4,000-5,000 da suka wuce, sun ƙunshi lavas na ethereal (fine) platy da lokacin farin ciki.  Amak Volcano na musamman ne a cikin cewa lavas na andesitic, yayin da aka haɗa shi da sauran Aleutians, ya ƙunshi yalwar potassium . Hakanan za su iya ƙunsar ƙarin sodium carbonate da ma'auni na ƙasa mai wuya fiye da ka'idar Aleutian. Marsh, B.D.; Leit, R.E. (November 1979). "Geology of Amak Island, Aleutian Islands, Alaska". Journal of Geology. 87 (6). The University of Chicago Press: 715–723. Bibcode:1979JG.....87..715M. doi:10.1086/628461. S2CID 129300866. Tsakanin Bogoslof, sauran tsibirin Aleutian arewacin babban baka, da Amak, lavas na Amak sun fi alkalic da silicic . 

Glaciation ya faru a kusa da dutsen mai aman wuta kimanin shekaru 6700 BP, yana sassaka kwaruruka masu siffar U. A gefen kudu maso yamma na tsibirin, ana iya samun wani rami mai yuwuwa maar, a cikin wani fili mai cike da rudani . 

 Tarihi mai fashewa 
Dutsen Dutsen Amak ya fashe sau uku a tarihi: kusan 2550 BC, daga 1700 zuwa 1710, kuma a cikin 1796; An gano farkon waɗannan abubuwan da suka faru tare da tephrochronology . Kowane fashewa yana da siffa ta lafa, kuma fashewar biyu na baya-bayan nan sun haɗa da fashewar ramuka. 

 Manazarta 

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