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Allan Hills A78050 | |||||||||||||||||||||||||
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Basic information | Name: Allan Hills A78050 This is an OFFICIAL meteorite name. Abbreviation: ALHA78050 This meteorite may also be called Allan Hills 78050 (ALH 78050) in publications. Observed fall: No Year found: 1978 Country: Antarctica [Collected jointly by ANSMET (US) and NIPR (Japan)] Mass: 1045 g | ||||||||||||||||||||||||
Classification history: |
This is 1 of 12727 approved meteorites (plus 11 unapproved names) classified as L6. [show all] Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||
Writeup |
Writeup from AMN 3(1):
This text was reprinted from AMN 3(1) in AMN 4(1). In some cases, it may be an updated version from the original. Sample No.: ALHA78050 Location: Allan Hills Field No.: 262 Weight (gms): 1045.0 Meteorite Type: L6 Chondrite
Physical Description: This is not a complete specimen. The N, T and B surfaces are fracture surfaces that are stained reddish-brown by iron-oxidation. Inclusions in the meteorite are apparent on these surfaces and patches of remnant fusion crust remain on the B surface. The fusion crust, where present, is mottled brown and black. Unoxidized (<5%) metallic particles, and some metallic particles with oxidation halos are apparent on the sawed surfaces of the sample. Fracturing, with oxidation staining along the margins, is apparent on the W sawed face, as are small irregular inclusions. Dimensions: 15 x 8 x 6 cm.
Petrographic Description: Brian Mason Chondrules are sparse and ill-defined, their borders tending to merge with the granular groundmass, which consists of olivine and pyroxene, minor subequal amounts of nickel-iron and troilite, a little plagioclase, and accessory chromite. A little limonitic staining is associated with some of the nickel-iron grains. Microprobe analyses show olivine (Fa23), orthopyroxene (Fs20), and plagioclase (An12) of uniform composition. The meteorite is classified as an L6 chondrite. | ||||||||||||||||||||||||
Data from: MB76 Table 2 Line 293: |
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Catalogs: |
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References: | Published in Antarctic Meteorite Newsletter 3(1) (1980), JSC, Houston Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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Geography: |
Statistics: This is 1 of 44400 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||||||
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Revision history: |
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