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| Hardpan Flat | |||||||||||||||||||||||||||||||||||||||
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| Basic information | Name: Hardpan Flat This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2015 Country: United States Mass:  2.6 g | ||||||||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 629 approved meteorites classified as Ureilite. [show all] Search for other: Achondrites, Ureilites | ||||||||||||||||||||||||||||||||||||||
| Comments: | Approved 5 Apr 2020 | ||||||||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 109:
Hardpan Flat 41°7.0’N, 118°19.0’W Nevada, United States Find: 2015 Aug 06 Classification: Ureilite History: While searching for meteorites on the evening of 2015 August 06, Robert Verish hastily gathered a bagful of pebbles from the surface of a dry lake just before nightfall. It was not until 2019 August that he scrutinized the contents of that bag, and recognized one of the small pebbles as being a meteorite. Physical characteristics: This 2.6 g, black fusion-crusted, oriented pebble has a well-preserved exterior. A cut surface reveals a gray, coarse-crystalline matrix. Petrography: The silicates are about 90% olivine, 10% pigeonite. In typical ureilite fashion an additional minor component is dark interstitial matter, presumably carbon; and olivine rims are sprinkled with tiny Fe-metals formed by reduction. The silicates are uniformly close to 1.0 × 0.5 mm; with maximum dimension found (in one small thin section) about 1.8 mm. The silicate grains show a clear preferred alignment of their long axes (lamination). Geochemistry: Olivine core composition clusters very tightly at Fa16.48±0.14 (9 analyses), but reduced rim compositions (7 analyses) are as FeO-depleted as Fa3.3. Pigeonite clusters very tightly at Fs14.2Wo8.8 (8 analyses). Classification: Ureilite Specimens: 1.1 grams at UCLA; main mass with Verish. | ||||||||||||||||||||||||||||||||||||||
| Data from: MB109 Table 0 Line 0: |
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| Institutions and collections |
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011) Verish: Robert Verish, Meteorite-Recovery Lab, P.O. Box 463084, Escondido, CA 92046, United States; Website (private address; updated 27 May 2009) |
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| References: | Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Geography:
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Statistics: This is 1 of 158 approved meteorites from Nevada, United States (plus 4 unapproved names) This is 1 of 1894 approved meteorites from United States (plus 890 unapproved names) (plus 28 impact craters) | ||||||||||||||||||||||||||||||||||||||
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