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rock > igneous rock > differentiated meteorite > differentiated achondrite > asteroidal achondrite > aubrite > Mayo Belwa

Mayo Belwa
subject			fact

Mayo Belwa	has image
	is an instance of aubrite
	is an instance of meteorite fall
	has name Mayo Belwa
	has fall date August 3, 1974
	has fall coordinates 8° 58' N., 12° 5' E.
	has fall location Adamawa district of north-eastern Nigeria
	has mass 4.85 kg
aubrite	has letter designation AUB
	has characteristic mineral enstatite
	has total mass of finds 1205 kg
	has number of finds 9
	has minerology enstatite, forsterite, sodic plagioclase, metal, numerous sulfides
	has petrology breccias of igneous lithologies
	has likely origin melted and crystallized residues from partial melting
meteorite fall	has value higher because the fall was witnessed
	has fall description what witnesses saw or what was recorded by instruments
	has weathering negligible due to quick recovery of meteorite before corrosion begins
asteroidal achondrite	has origin asteroid
highly reduced meteorite	has oxidation state highly reduced with very little FeO
meteorite	has fall map which appears as an elongated footprint which depends on impact angle, airbursts, and impact velocity
	can have crater image
	has original mass which can over an order of magnitude greater than total mass of fragment(s) collected at the impact site
	has composition often minerals not found on Earth
	has relative abundance
	has impact velocity when it hits the ground which is smaller than its velocity before it enters the atmosphere
	has impact angle
	has weather resistance which depends on its composition
	has monetary value large if the fall was witnessed
	often produce power outages and failures in electrical equipment due to EMP (electromagnetic pulse)
	can be associated with crater
	has origin meteoroid from interplanetary space or fragment dislodged from another planet, moon or planetesimal
	vaporizes completely if size is between 3 micrometers and 3 millimeters
	can survive fall if size is larger than 3 mm and velocity is less than 24 km per second
	can survive fall if it fragments because smaller pieces with less mass are more easily slowed by the atmosphere
	has ablative mass loss depending on composition, more friable stony meteoroids loses more mass than iron meteoroid
	has ablative mass loss directly proportional to initial velocity
	can shatter during impact phase
	can fragment during meteor phase
	has fragmentation probability during meteor phase which depends on composition
rock	has part mineral
	has texture
	has genesis
achondrite	has distinguishing feature no chondrules
igneous rock	has solidification mechanism
	has solidification timescale

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