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Allan Hills A79033 | |||||||||||||||||||||
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Basic information | Name: Allan Hills A79033 This is an OFFICIAL meteorite name. Abbreviation: ALHA79033 This meteorite may also be called Allan Hills 79033 (ALH 79033) in publications. Observed fall: No Year found: 1979 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass: ![]() | ||||||||||||||||||||
Classification history: |
This is 1 of 12206 approved meteorites (plus 7 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 4(1):
Sample No.: ALHA79033 Location: Allan Hills Field No.: 1170 Weight (gms): 208.8 Meteorite Type: L6 Chondrite
Physical Description: Roberta Score All except one surface (which is a fracture surface) are covered with dull black to brown fusion crust. The fracture surface has weathered to a reddish-brown color, but several millimeter size inclusions are apparent on this surface. A 1 mm to 5 mm thick weathering rind is visible in the interior of this meteorite. The material exposed through chipping is light-gray in color with darker gray colored inclusions and mottled with reddish-brown oxidation. Metal is apparent but most of it has oxidation haloes around them. Dimensions: 7.5 x 6.5 x 3.5 cm.
Petrographic Description: Brian Mason Chondrules are sparse and poorly defined, their margins merging with the granular groundmass, which consists largely of olivine and pyroxene with minor amounts of plagioclase, nickel-iron, and troilite. Fusion crust up to 0.6 mm thick is present along one edge. There is a moderate degree of weathering, shown by limonitic staining around nickel-iron grains. Microprobe analyses show olivine (Fa24), pyroxene (Fs20), and plagioclase (An10) of uniform composition. The meteorite is classified as an L6 chondrite. | ||||||||||||||||||||
Data from: MB76 Table 2 Line 470: |
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References: | Published in Antarctic Meteorite Newsletter 4(1) (1981), JSC, Houston Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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Geography:![]() |
Statistics: This is 1 of 43700 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||
Proximity search: |