চিকশুলুব খাদ
উইকিপিডিয়া, মুক্ত বিশ্বকোষ থেকে
চিকশুলুব খাদ (আ-ধ্ব-ব: [tʃikʃuˈlub]) ইউকাটান উপদ্বীপে মাটির নিচে চাপা পড়ে থাকা একটি প্রাচীন সংঘর্ষ জ্বালামুখ। এর কেন্দ্র মেক্সিকোর ইউকাটান অঞ্চলের চিকশুলুবে অবস্থিত। প্রায় ১৮০ কিমি (১১০ মাইল) ব্যাসবিশিষ্ট এই জ্বালামুখটি পৃথিবীতে এ পর্যন্ত নিশ্চিতভাবে আবিষ্কৃত বৃহত্তম সংঘর্ষ কাঠামোগুলোর একটি। যে গ্রহাণু বা ধূমকেতুর আঘাতে এটি তৈরি হয়েছিল তার ব্যাস ছিল অন্তত ১০ কিমি (৬ মাইল)। জ্বালামুখটির নাম রাখা হয়েছে পার্শ্ববর্তী শহরের নামানুসারে। অবশ্য মায়ান ভাষায় এই শব্দের অর্থ "শয়তানের লেজ"।
মন্তব্য [সম্পাদনা]
তথ্যসূত্র [সম্পাদনা]
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- Mullen, Leslie (2004-11-04)। "Deep Impact - Shiva: Another K–T Impact?"। Astrobiology Magazine। http://www.spacedaily.com/news/deepimpact-04r.html। সংগৃহীত 2007-09-29।
- Mullen, Leslie (2004-10-21)। "Did Multiple Impacts Pummel Earth 35 Million Years Ago?"। spacedaily.com। http://www.spacedaily.com/news/deepimpact-04p.html। সংগৃহীত 2007-09-29।
- Perlman, David (2007-09-06)। "Scientists say they know where dinosaur-killing asteroid came from"। San Francisco Chronicle। http://www.sfgate.com/cgi-bin/article.cgi?f=/c/a/2007/09/06/MNVFRUVCK.DTL। সংগৃহীত 2007-10-03।
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- Sharpton VL, Marin LE (1997)। "The Cretaceous–Tertiary impact crater and the cosmic projectile that produced it"। Annals of the New York Academy of Sciences 822: 353–80। PMID 11543120।
- Stewart, S. A. (2005)। "3D seismic reflection mapping of the Silverpit multi-ringed crater, North Sea"। Geological Society of America Bulletin 117 (3): 354–368। ডিওআই:10.1130/B25591.1। http://www.gsajournals.org/perlserv/?request=get-document&doi=10.1130%2FB25591.1।
- Stewart S. A., Allen P. J. (2002)। "A 20-km-diameter multi-ringed impact structure in the North Sea"। Nature 418 (6897): 520–3। PMID 12152076।
- Than, Ker (2006-11-28)। "Study: Single Meteorite Impact Killed Dinosaurs"। livescience.com। http://www.livescience.com/animals/061128_dinosaur_extinct.html। সংগৃহীত 2007-09-29।
- Web Elements (2007)। "Geological Abundances"। webelements.com। http://www.webelements.com/webelements/elements/text/Ir/geol.html। সংগৃহীত 2007-09-26।
- Weinreb, David B. (March 2002)। "Catastrophic Events in the History of Life: Toward a New Understanding of Mass Extinctions in the Fossil Record - Part I"। jyi.org। http://www.jyi.org/volumes/volume5/issue6/features/weinreb.html। সংগৃহীত 2007-10-03।
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বহিঃসংযোগ [সম্পাদনা]
- Satellite image of the region (from Google Maps)
- NASA JPL: "A 'Smoking Gun' for Dinosaur Extinction", March 6, 2003
- Chicxulub, Crater of Doom
