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LEW 97223
subject			fact

LEW 97223	is an instance of ungrouped enstatite chondrite
	is an instance of Antarctic meteorite
	has name LEW 97223
	has fall location Lewis Cliffs, Antarctica
	has find date 1997
Antarctic meteorite	has identification date
enstatite chondrite	has synonym E chondrite
	has total mass of finds 234 kg
	has number of finds 16
	has oxidized iron content zero
meteorite	has fall date recorded by eyewitness or inferred from dating methods
	has fall coordinates in degrees, minutes and seconds of lattitude and longitude
	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 total mass of finds 485755 kg
	has number of finds 1691
	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
anhydrous chondrite	has part water 0 % by weight (approximately)
highly reduced meteorite	has oxidation state highly reduced with very little FeO
rock	has part mineral
	has texture
	has genesis
chondrite	has petrologic type range which depends on degree of aqueous alteration and thermal metamorphism
	has part chondrule as a distinguishing feature -has URL: http://www.arachnaut.org/meteor/chondrules.html
	has homogeneity of olivine and low Ca pyroxene definition goes here
	has structural state of low Ca pyroxene definition goes here
	has part feldspar usually plagioclase tectosilicate
	has chondrule glass type
	has part metal maximum bulk in weight %
	has part mean Ni content of sulfides in weight %
	has part matrix fine grained disequilibrium mixture of silicates, oxides, metal, sulfides and organic constituents
	has part chondrule small sphere of about 1 mm diameter of formerly melted minerals
	has part carbon in weight %
	has chondrule abundance in volume %
	has matrix abundance in volume %
	has refractory inclusion abundance in volume %
	has metal abundance in volume %
	has chondrule mean diameter millimeters
undifferentiated meteorite	has peak temperature less than 950 degree Celsius during its entire history since solidification
	has parent body asteroid smaller than 100 km in diameter
	has age oldest and most primitive rock in solar system
conglomerate	has sediment mechanism agglomeration of particles, many of which record individual, diverse histories

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