Name: Miller Range 15285 This is an OFFICIAL meteorite name. Abbreviation: MIL 15285 Observed fall: No Year found: 2015 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass: 39.7 g
90% of the exterior is covered with a rough, black fusion crust that has some pitting. The exposed interior is a grey matrix with both light and dark, round inclusions (1-2mm) and some dark orange rust spots.
Thin Section Description (,2) - Cari Corrigan, Tim McCoy
The host of the meteorite is an unremarkable LL4 chondrite that is modestly weathered and shocked. Olivine compositions are Fa28, pyroxene compositions are Fs23. However, this meteorite contains a remarkable set of inclusions including a 3.5 x 2.4 mm single grain of plagioclase that exhibits numerous fractures and mosaicism. The composition is An67Or1. In addition, there is a ~3 mm diameter olivine-rich chondrule (?) with slightly heterogeneous compositions of Fa25-29 and a 2 mm diameter silicate glass particle with cruciform dendritic quench crystals. The variety of particles suggest that this rock may be an asteroidal regolith breccia.
JSC: Mailcode XI, 2101 NASA Parkway, NASA Johnson Space Center, Houston, TX 77058, United States; Website (institutional address; updated 28 Jul 2022) SI: Department of Mineral Sciences, NHB-119, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, United States; Website (institutional address; updated 16 Jan 2012)
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