Kenna Comparison Table

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rock > igneous rock > differentiated meteorite > differentiated achondrite > asteroidal achondrite > ureilite > medium shock ureilite > Kenna

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Kenna comparison table

Subject has weather resistance has shock texture has reference has minerology has degree of shock metamorphism has shock stage is an instance of has distinguishing feature has fragmentation probability has fall location has olivine grain characteristic has pyroxene shock metamorphism has metamorphism mechanism has likely origin has solidification mechanism has name has shock diagnostic mineral has olivine composition has olivine shock metamorphism has weather has letter designation has relative abundance has texture has value has total mass of find has matrix composition has fall coordinate has characteristic mineral has composition is a kind of has find date has mass has image has number of find has origin has ablative mass loss has shock pressure has solidification timescale has plagioclase has pigeonite composition has intergranular boundary has definition has gain size has pyroxene content has petrology

medium shock ureilite which depends on its composition greater extent of fracturing, undulatory extinction, and kink banding olivine, pyroxene (some combination of pigeonite, orthopyroxene, augite) medium S4-S6 no chondrules during meteor phase which depends on composition 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 may be cloudy due to glassy inclusions shock metamorphism partial melting residue cooling in deep underground chambers based on the locale, region, or nearby town in which the fall occurred diamonds and/or lonsdaleite sub-grain boundaries may be prominent AURE 9 kg (out of date) carbon, metal, sulfides small silicate grains along grain boundaries less than 10% by volume in degrees, minutes and seconds of lattitude and longitude olivine-pigeonite about 90% by volume often minerals not found on Earth S6 shock stage meteorite 6 (out of date) asteroid directly proportional to initial velocity from 20 GPa to 100 GPa very slow coarse-grained granular

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 in degrees, minutes and seconds of lattitude and longitude 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

monomict 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 large, anhedral olivine and pyroxene grains 9 kg (out of date) carbon, metal, sulfides small silicate grains along grain boundaries less than 10% by volume in degrees, minutes and seconds of lattitude and longitude olivine-pigeonite about 90% by volume silicates (with very few exceptions) ureilite 6 (out of date) asteroid high because it is more friable than iron meteorite very slow 0 % curved meeting in triple junctions 1 mm coarse-grained granular

Kenna which depends on its composition greater extent of fracturing, undulatory extinction, and kink banding Berkley et. al (1980) olivine, pyroxene (some combination of pigeonite, orthopyroxene, augite) medium S4-S6 meteorite find no chondrules during meteor phase which depends on composition Roosevelt County, New Mexico reduced rims contacting carbonaceous matrix material 0.1 mm FeO-free olivine and/or enstatite rims riddled with tiny inclusions of low-Ni metal may be cloudy due to glassy inclusions shock metamorphism partial melting residue cooling in deep underground chambers Kenna diamonds and/or lonsdaleite Fo% 79 sub-grain boundaries may be prominent can be severe due to long exposure time to environmental corrosion agents AURE large, anhedral olivine and pyroxene grains lower because the fall was not witnessed 485755 kg carbon, metal, sulfides small silicate grains along grain boundaries less than 10% by volume 33° 54' N., 103° 33.2' W. olivine-pigeonite about 90% by volume often minerals not found on Earth February 1972 10.9 kg
1691 meteoroid from interplanetary space or fragment dislodged from another planet, moon or planetesimal directly proportional to initial velocity from 20 GPa to 100 GPa very slow 0 % Wo% 9.8 En% 72 curved meeting in triple junctions 1 mm 0.25 in modal pyroxene/(pryroxene+olivine) coarse-grained granular

Next medium shock ureilite: Lahrauli Up: medium shock ureilite, meteorite find, monomict ureilite Previous medium shock ureilite: Jalanash

Subject	has weather resistance	has shock texture	has reference	has minerology	has degree of shock metamorphism	has shock stage	is an instance of	has distinguishing feature	has fragmentation probability	has fall location	has olivine grain characteristic	has pyroxene shock metamorphism	has metamorphism mechanism	has likely origin	has solidification mechanism	has name	has shock diagnostic mineral	has olivine composition	has olivine shock metamorphism	has weather	has letter designation	has relative abundance	has texture	has value	has total mass of find	has matrix composition	has fall coordinate	has characteristic mineral	has composition	is a kind of	has find date	has mass	has image	has number of find	has origin	has ablative mass loss	has shock pressure	has solidification timescale	has plagioclase	has pigeonite composition	has intergranular boundary	has definition	has gain size	has pyroxene content	has petrology
medium shock ureilite	which depends on its composition	greater extent of fracturing, undulatory extinction, and kink banding		olivine, pyroxene (some combination of pigeonite, orthopyroxene, augite)	medium	S4-S6		no chondrules	during meteor phase which depends on composition	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	may be cloudy due to glassy inclusions	shock metamorphism	partial melting residue	cooling in deep underground chambers	based on the locale, region, or nearby town in which the fall occurred	diamonds and/or lonsdaleite		sub-grain boundaries may be prominent		AURE				9 kg (out of date)	carbon, metal, sulfides small silicate grains along grain boundaries less than 10% by volume	in degrees, minutes and seconds of lattitude and longitude	olivine-pigeonite about 90% by volume	often minerals not found on Earth	S6 shock stage meteorite				6 (out of date)	asteroid	directly proportional to initial velocity	from 20 GPa to 100 GPa	very slow							coarse-grained granular
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		in degrees, minutes and seconds of lattitude and longitude		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
monomict 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	large, anhedral olivine and pyroxene grains		9 kg (out of date)	carbon, metal, sulfides small silicate grains along grain boundaries less than 10% by volume	in degrees, minutes and seconds of lattitude and longitude	olivine-pigeonite about 90% by volume	silicates (with very few exceptions)	ureilite				6 (out of date)	asteroid	high because it is more friable than iron meteorite		very slow	0 %		curved meeting in triple junctions		1 mm		coarse-grained granular
Kenna	which depends on its composition	greater extent of fracturing, undulatory extinction, and kink banding	Berkley et. al (1980)	olivine, pyroxene (some combination of pigeonite, orthopyroxene, augite)	medium	S4-S6	meteorite find	no chondrules	during meteor phase which depends on composition	Roosevelt County, New Mexico	reduced rims contacting carbonaceous matrix material 0.1 mm FeO-free olivine and/or enstatite rims riddled with tiny inclusions of low-Ni metal	may be cloudy due to glassy inclusions	shock metamorphism	partial melting residue	cooling in deep underground chambers	Kenna	diamonds and/or lonsdaleite	Fo% 79	sub-grain boundaries may be prominent	can be severe due to long exposure time to environmental corrosion agents	AURE		large, anhedral olivine and pyroxene grains	lower because the fall was not witnessed	485755 kg	carbon, metal, sulfides small silicate grains along grain boundaries less than 10% by volume	33° 54' N., 103° 33.2' W.	olivine-pigeonite about 90% by volume	often minerals not found on Earth		February 1972	10.9 kg		1691	meteoroid from interplanetary space or fragment dislodged from another planet, moon or planetesimal	directly proportional to initial velocity	from 20 GPa to 100 GPa	very slow	0 %	Wo% 9.8 En% 72	curved meeting in triple junctions		1 mm	0.25 in modal pyroxene/(pryroxene+olivine)	coarse-grained granular