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| Allan Hills A77074 | |||||||||||||||||||||||||
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| Basic information | Name: Allan Hills A77074 This is an OFFICIAL meteorite name. Abbreviation: ALHA77074 This meteorite may also be called Allan Hills 77074 (ALH 77074) in publications. Observed fall: No Year found: 1977 Country: Antarctica [Collected jointly by ANSMET (US) and NIPR (Japan)] Mass:  12.1 g | ||||||||||||||||||||||||
| Classification history: |
This is 1 of 11372 approved meteorites (plus 22 unapproved names) classified as H5. [show all] Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||
| Writeup |
Writeup from AMN 4(1):
Sample No.: ALHA77074 Location: Allan Hills Field No.: 77122721 Weight (gms): 12.07 Meteorite Type: H5 Chondrite
Physical Description: The stone is moderately angular. Approximately 70% of the sample's exterior surface is covered by a brownish-black fusion crust. The remaining surfaces are fracture-surfaces that are yellowish-brown and severely weathered. An irregular cavity ~4 mm diameter is present on one fracture surface. Chipping for a thin section sample revealed fresh metal fragments on the interior. Approximate maximum dimension is 2.5 cm.
Petrographic Description: Brian Mason This meteorite is similar in texture, mineral composition, and degree of weathering to Allan Hills 77061, 77062, 77064, and 77071, which suggests that these stones may be separate pieces of the same meteorite. | ||||||||||||||||||||||||
| Data from: MB76 Table 2 Line 64: |
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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:
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Statistics: This is 1 of 44248 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||||||
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