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meteorite characteristic > stone meteorite characteristic > chondritic meteorite characteristic > chondrule

chondrule
subject			fact

chondrule	is a part of chondrite
	is a kind of chondritic meteorite characteristic
	has definition small sphere of about 1 mm diameter found in meteorites chondrule is composed of formerly melted or partially melted minerals
	is a part of chondrite
	has diameter usually less than 1 mm but can range from 0.1 to 10 millimeters
	has relative volume 80 % of volume of ordinary and enstatite chondrite and greater than 15 % of most other chondrite groups
	has composition glass
	has texture
	has abundance most abundant part of chondrite meteorite
	is a part of chondrite

Kinds of chondrule :

• aluminum-rich chondrule
• chromite-rich chondrule
• compound chondrule (3 facts) - two or more chondrules conjoined during chondrule formation
• cryptocrystaline chondrule (5 facts) (C chondrule) - chondrule with extremely fine-grained intergrowths of pyroxene and glass with grain size less than 2 micrometers
• ferromagnesian chondrule (6 kinds, 4 facts) - chondrule with a high abundance of olivine and pyroxene crystals
• granular olivine-pyroxene chondrule (2 facts) - chondrule with uniformly smaller grains than porphyritic chondrules
• porphyritic chondrule (3 kinds, 3 facts)
• silica-bearing chondrule
• superliquidus chondrule (2 kinds, 3 facts)
• type A chondrule (2 kinds, 4 facts) - a chondrule textural classification based on the predominance of olivine crystals
• type AB chondrule (2 kinds, 3 facts)
• type B chondrule (2 kinds, 4 facts) - a chondrule textural classification based on the predominance of pyroxene crystals
• type I chondrule (3 kinds, 5 facts) - a chondrule compositional classification based on low iron oxide content and reduced oxidation state
• type II chondrule (3 kinds, 5 facts) - a chondrule compositional classification based on high iron oxide content and highly oxidized state