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DaG 055
subject			fact

DaG 055	has image
	is an instance of ungrouped carbonaceous chondrite
	is an instance of Dar al Gani meteorite
	has petrologic subtype 3
	has name DaG 055
	is an instance of S2 shock stage chondrite
	has find date June 1995
	has fall coordinates 27° 16.03' N., 16° 25.22' E.
	has weathering stage W1
	has mass 0.451 kg
Dar al Gani meteorite	has fall location Dar al Gani plateau, Libyan Sahara Desert
	has acronym DaG
S2 shock stage chondrite	has olivine shock metamorphism undulatory extinction, irregular fractures
	has plagioclase shock metamorphism undulatory extinction, irregular fractures
	has orthopyroxene shock metamorphism undulatory extinction, irregular fractures, some planar fractures
carbonaceous chondrite	has relative abundance 8 % of meteorite falls
	has total mass of finds 2577 kg
	has number of finds 36
	has distinguishing feature elemental carbon
	has abundance rare relative to other chondrite types
shocked chondrite	is independent of the nature and degree of thermal metamorphism or aqueous alteration
	can be shocked before, during or after other types of metamorphism
	has shock pressure the equilibration peak shock pressure in GPa (gigapascals) for ordinary chondrites only
	has shock diagnostic mineral olivine and plagioclase for ordinary chondrite
	has shock diagnostic mineral olivine for carbonaceous chondrite
	has shock diagnostic mineral orthopyroxene for enstatite chondrite
S2 shock stage meteorite	has shock stage S2
	has shock pressure 5 to 10 GPa
	has degree of shock metamorphism very weakly shocked
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 part water 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
meteorite	has fall date recorded by eyewitness or inferred from dating methods
	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 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
meteorite find	has value lower because the fall was not witnessed
	has weathering can be severe due to long exposure time to environmental corrosion agents
altered chondrite	has degree of secondary processing providing insight into geological evolution of parent asteroid
shocked meteorite	has metamorphism mechanism shock metamorphism
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
rock	has part mineral
	has texture
	has genesis
conglomerate	has sediment mechanism agglomeration of particles, many of which record individual, diverse histories

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