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rock > igneous rock > differentiated meteorite > differentiated achondrite > asteroidal achondrite > HED meteorite > eucrite > DaG 609

DaG 609
subject			fact

DaG 609	has image
	is an instance of Dar al Gani meteorite
	is an instance of S3 shock stage meteorite
	is an instance of eucrite
	has comment iron-rich, monomict, with chromite grains
	has mass 0.696 kg
	has find date 1998
	has weathering stage W2
	has pyroxene composition Fs% 27-63
	classified by A. Sexton, Open University, UK. A. Sexton, Meteoritical Bulletin No 83
	has number of fragments 2
	has image
	has fall coordinates 26° 53.13' N. 16° 34.81' E.
Dar al Gani meteorite	has fall location Dar al Gani plateau, Libyan Sahara Desert
	has acronym DaG
S3 shock stage meteorite	has shock stage S3
	has shock pressure 15 to 20 GPa
	has degree of shock metamorphism weakly shocked
eucrite	has letter designation AUEC
	has characteristic mineral anorthite-pigeonite Ca-rich
	has total mass of finds 231 kg
	has number of finds 23
shocked meteorite	has metamorphism mechanism shock metamorphism
HED meteorite	is an acronym for Howardite, Eucrite, Diogenite
	has origin 4 Vesta
	has minerology orthopyroxene, olivine, chromite; pigeonite, calcic plagioclase, silica
	has petrology coarse-grained orthopyroxenites, gabbros, fine- to coarse-grained basalts, brecciated
	has likely origin cumulates, crystallized melts, impact mixing
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 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
	has name based on the locale, region, or nearby town in which the fall occurred
	often produce power outages and failures in electrical equipment due to EMP (electromagnetic pulse)
	can be associated with crater
	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
volcanic rock	has solidification mechanism extrusion onto the surface of the planet or asteroid via a volcanic eruption
	has solidification timescale very rapid
rock	has part mineral
	has texture
	has genesis
achondrite	has distinguishing feature no chondrules

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