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・ Megacraspedus plutella
・ Megacraspedus popularis
・ Megacraspedus pusillus
・ Megacraspedus sagittifera
・ Megacraspedus sclerotricha
・ Megacraspedus sematacma
・ Megacraspedus separatellus
・ Megacraspedus serica
・ Megacraspedus squalida
・ Megacraspedus stratimera
・ Megacraspedus subdolellus
・ Megacraspedus tristictus
・ Megacraspedus tutti
・ Megacraspedus violacellum
・ Megacronycta
Megacryometeor
・ Megacryst
・ Megactenodes
・ Megacyclops
・ Megacyllene
・ Megacyllene abnormis
・ Megacyllene acuta
・ Megacyllene anacantha
・ Megacyllene andesiana
・ Megacyllene angulata
・ Megacyllene angulifera
・ Megacyllene antennata
・ Megacyllene bonplandi
・ Megacyllene boryi
・ Megacyllene caryae


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Megacryometeor : ウィキペディア英語版
Megacryometeor
A megacryometeor is a very large chunk of ice which, despite sharing many textural, hydro-chemical and isotopic features detected in large hailstones, is formed under unusual atmospheric conditions which clearly differ from those of the cumulonimbus cloud scenario (i.e. clear-sky conditions). They are sometimes called huge hailstones, but do not need to form under thunderstorm conditions. Jesus Martinez-Frias, a planetary geologist at the Center for Astrobiology in Madrid, pioneered research into megacryometeors in January 2000 after ice chunks weighing up to rained on Spain out of cloudless skies for ten days.
==Mass and size==
More than 50 megacryometeors have been recorded since the year 2000. They vary in mass between to several tens of kilograms. One in Brazil weighed in at more than .〔(Gelo caindo do céu assusta moradores ) .〕
Chunks about in size fell in Scotland on 13 August 1849.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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