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

porphyritic chondrule
subject			fact

porphyritic chondrule	is a kind of chondrule
	has origin extensively melted droplet in which abundant heterogenous nucleation sites were preserved during the chondrule melting event
	has nucleation mechanism relict grains consisting of remnant crystals less than 10 microns in size
chondrule	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

Kinds of porphyritic chondrule :

• porphyritic olivine chondrule (5 facts) (PO chondrule) - chondrule with porphyritic olivine crytals
• porphyritic olivine-pyroxene chondrule (5 facts) (POP chondrule) - chondrule with a porphyritic mixture of olivine and pyroxene
• porphyritic pyroxene chondrule (5 facts) (PP chondrule) - chondrule with porphyritic pyroxene crytals