EET 87720 Comparison Table

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rock > igneous rock > differentiated meteorite > differentiated achondrite > asteroidal achondrite > ureilite > polymict ureilite > EET 87720

Next Antarctic meteorite: EETA 79001 Up: Antarctic meteorite, meteorite find, polymict ureilite Previous Antarctic meteorite: EET 83309

EET 87720 comparison table

Subject has weather resistance has reference has minerology is an instance of has distinguishing feature has fragmentation probability has fall location has olivine grain characteristic has likely origin has solidification mechanism has name has olivine composition has weather has letter designation has relative abundance has value has total mass of find has pronunciation has matrix composition has characteristic mineral has composition is a kind of has find date has augite composition has number of find has origin has ablative mass loss has solidification timescale has plagioclase has lithic clast composition has pigeonite composition has definition has petrology

Antarctic meteorite which depends on its composition during meteor phase which depends on composition indicated by letters in the beginning of name 3 or 4 letter contracted from find location then last two digits of year then id number 485755 kg often minerals not found on Earth meteorite recovery year is first 2 numbers in name 1691 meteoroid from interplanetary space or fragment dislodged from another planet, moon or planetesimal directly proportional to initial velocity

meteorite find which depends on its composition during meteor phase which depends on composition strewn fields, elongated footprints which depends on impact angle, airbursts, and impact velocity based on the locale, region, or nearby town in which the fall occurred can be severe due to long exposure time to environmental corrosion agents lower because the fall was not witnessed 485755 kg often minerals not found on Earth meteorite when the meteorite was found 1691 meteoroid from interplanetary space or fragment dislodged from another planet, moon or planetesimal directly proportional to initial velocity a meteorite whose fall was not witnessed

polymict ureilite low olivine, pyroxene (some combination of pigeonite, orthopyroxene, augite) no chondrules high because it is more friable than iron meteorite strewn fields, elongated footprints which depends on impact angle, airbursts, and impact velocity reduced rims contacting carbonaceous matrix material 0.1 mm FeO-free olivine and/or enstatite rims riddled with tiny inclusions of low-Ni metal partial melting residue cooling in deep underground chambers based on the locale, region, or nearby town in which the fall occurred AURE 7.1 % of meteorite falls 9 kg (out of date) bre - chia smaller mineral fragments, carbon, suessite (Fe3Si), sulfides, minor chromite and minor apatite olivine-pigeonite about 90% by volume silicates (with very few exceptions) polymict breccia 6 (out of date) asteroid high because it is more friable than iron meteorite very slow common in clasts typical monomict ureilite material plus a variety of other lithic clasts fragmental breccias containing lithic clasts of typical monomict ureilite material plus a variety of other lithic clasts coarse-grained granular

EET 87720 which depends on its composition Warren and Kallemeyn (1991), AMN 12-3, AMN 13-1 olivine, pyroxene (some combination of pigeonite, orthopyroxene, augite) Antarctic meteorite no chondrules during meteor phase which depends on composition Elephant Moraine, Antarctica reduced rims contacting carbonaceous matrix material 0.1 mm FeO-free olivine and/or enstatite rims riddled with tiny inclusions of low-Ni metal partial melting residue cooling in deep underground chambers EET 87720 Fo% 79-87 can be severe due to long exposure time to environmental corrosion agents AURE lower because the fall was not witnessed 485755 kg bre - chia smaller mineral fragments, carbon, suessite (Fe3Si), sulfides, minor chromite and minor apatite olivine-pigeonite about 90% by volume often minerals not found on Earth 1987 Wo% 35 En% 52 1691 meteoroid from interplanetary space or fragment dislodged from another planet, moon or planetesimal directly proportional to initial velocity very slow common in clasts typical monomict ureilite material plus a variety of other lithic clasts Wo% 8.0 En% 83 coarse-grained granular

Next Antarctic meteorite: EETA 79001 Up: Antarctic meteorite, meteorite find, polymict ureilite Previous Antarctic meteorite: EET 83309

Subject	has weather resistance	has reference	has minerology	is an instance of	has distinguishing feature	has fragmentation probability	has fall location	has olivine grain characteristic	has likely origin	has solidification mechanism	has name	has olivine composition	has weather	has letter designation	has relative abundance	has value	has total mass of find	has pronunciation	has matrix composition	has characteristic mineral	has composition	is a kind of	has find date	has augite composition	has number of find	has origin	has ablative mass loss	has solidification timescale	has plagioclase	has lithic clast composition	has pigeonite composition	has definition	has petrology
Antarctic meteorite	which depends on its composition					during meteor phase which depends on composition	indicated by letters in the beginning of name				3 or 4 letter contracted from find location then last two digits of year then id number						485755 kg				often minerals not found on Earth	meteorite	recovery year is first 2 numbers in name		1691	meteoroid from interplanetary space or fragment dislodged from another planet, moon or planetesimal	directly proportional to initial velocity
meteorite find	which depends on its composition					during meteor phase which depends on composition	strewn fields, elongated footprints which depends on impact angle, airbursts, and impact velocity				based on the locale, region, or nearby town in which the fall occurred		can be severe due to long exposure time to environmental corrosion agents			lower because the fall was not witnessed	485755 kg				often minerals not found on Earth	meteorite	when the meteorite was found		1691	meteoroid from interplanetary space or fragment dislodged from another planet, moon or planetesimal	directly proportional to initial velocity					a meteorite whose fall was not witnessed
polymict ureilite	low		olivine, pyroxene (some combination of pigeonite, orthopyroxene, augite)		no chondrules	high because it is more friable than iron meteorite	strewn fields, elongated footprints which depends on impact angle, airbursts, and impact velocity	reduced rims contacting carbonaceous matrix material 0.1 mm FeO-free olivine and/or enstatite rims riddled with tiny inclusions of low-Ni metal	partial melting residue	cooling in deep underground chambers	based on the locale, region, or nearby town in which the fall occurred			AURE	7.1 % of meteorite falls		9 kg (out of date)	bre - chia	smaller mineral fragments, carbon, suessite (Fe3Si), sulfides, minor chromite and minor apatite	olivine-pigeonite about 90% by volume	silicates (with very few exceptions)	polymict breccia			6 (out of date)	asteroid	high because it is more friable than iron meteorite	very slow	common in clasts	typical monomict ureilite material plus a variety of other lithic clasts		fragmental breccias containing lithic clasts of typical monomict ureilite material plus a variety of other lithic clasts	coarse-grained granular
EET 87720	which depends on its composition	Warren and Kallemeyn (1991), AMN 12-3, AMN 13-1	olivine, pyroxene (some combination of pigeonite, orthopyroxene, augite)	Antarctic meteorite	no chondrules	during meteor phase which depends on composition	Elephant Moraine, Antarctica	reduced rims contacting carbonaceous matrix material 0.1 mm FeO-free olivine and/or enstatite rims riddled with tiny inclusions of low-Ni metal	partial melting residue	cooling in deep underground chambers	EET 87720	Fo% 79-87	can be severe due to long exposure time to environmental corrosion agents	AURE		lower because the fall was not witnessed	485755 kg	bre - chia	smaller mineral fragments, carbon, suessite (Fe3Si), sulfides, minor chromite and minor apatite	olivine-pigeonite about 90% by volume	often minerals not found on Earth		1987	Wo% 35 En% 52	1691	meteoroid from interplanetary space or fragment dislodged from another planet, moon or planetesimal	directly proportional to initial velocity	very slow	common in clasts	typical monomict ureilite material plus a variety of other lithic clasts	Wo% 8.0 En% 83		coarse-grained granular