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L chondrite : ウィキペディア英語版
L chondrite

The L type ordinary chondrites are the second most common group of meteorites, accounting for approximately 35% of all those catalogued, and 40% of the ordinary chondrites.〔(Natural History Museum, meteorite catalogue )〕 The ordinary chondrites are thought to have originated from three parent asteroids, with the fragments making up the H chondrite, L chondrite and LL chondrite groups respectively.〔(NASA (YouTube) – Dr. David Kring – Asteroid Initiative Workshop Cosmic Explorations Speakers Session )〕
==Name==
Their name comes from their relatively low iron abundance, with respect to the H chondrites, which is about 20–25% iron by weight.
Historically, the L chondrites have been named ''hypersthene chondrites'' or ''olivine hypersthene chondrites'' for the dominant minerals, but these terms are now obsolete.

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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