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meteorite characteristic > meteorite fusion crust

meteorite fusion crust
subject			fact

meteorite fusion crust	is a part of meteorite
	is a kind of meteorite characteristic
	has definition melted glassy exterior of meteorite that forms by ablation during meteor phase
	has extent directly proportional to the initial velocity of a meteoroid
	has color black except for rare iron-poor meteorites
	has texture
	has weather resistance
	has composition
	has thickness varies from front to rear on oriented meteorites, thicker in the rear since ablated material accumulates toward the rear
	is different from interior of meteorite
	has part striations due to flow of ablated material during meteor phase especially on oriented meteorites

Kinds of meteorite fusion crust :

• iron meteorite fusion crust (7 facts)
• primary fusion crust (4 facts) - thin layer of ablated material that forms before a potential meteoroid break up from the beginning of incandescent flight until dark flight
• secondary fusion crust (4 facts) - forms on a freshly broken face if the meteoroid break up occurs before reaching the retardation point
• stone meteorite fusion crust (5 kinds, 6 facts)