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Miller Range 090356
Basic information Name: Miller Range 090356
     This is an OFFICIAL meteorite name.
Abbreviation: MIL 090356
Observed fall: No
Year found: 2009
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 3.2 g
Antarctic Meteorite Newsletter:  AMN 34(1)  (2011)  Ureilite
AMN 35(2)  (2012)  Achondrite-ung
Meteoritical Bulletin:  MB 101  (2012)  Achondrite-ung
Recommended:  Achondrite-ung    [explanation]

This is 1 of 140 approved meteorites classified as Achondrite-ung.   [show all]
Search for other: Achondrites, Ungrouped achondrites
Comments: Field number: 20575
Approved 14 Feb 2011
Revised 4 Sep 2012: Reclassified in AMN 35(2)
Writeup from AMN 34(1):
Sample Number MIL 090356
Newsletter 34,1
Location Miller Range
Field Number 20575
Dimensions 1.5 x 1.25 x 1.0
Weight 3.191
Original Classification Ureilite
Pairing MIL090340; MIL090356
Mineral Composition (%Fa &  %Fs)
Fayalite (mol%): 28-30 ; Ferrosilite (mol%): 10-26
Macroscopic Description - Kathleen McBride
The exteriors have shiny dark brown fusion crust with some rusty patches and pits. The interiors are dark gray to black with crystalline textures, rust and high metal.
Thin Section (,2) Description - Cari Corrigan and Linda Welzenbach
These sections consist of an aggregate of equigranular (up to 1-2 mm) olivine grains. Individual olivine grains are rimmed by carbon-rich material containing grains of metal. Olivine has cores of Fa27-30. Pyroxene grains have compositions of Fs10-26 and Wo2-44. These meteorites are ureilites.
Antarctic Meteorite Images for Sample MIL 090356
Thin Section Photo of Sample MIL 090356 at 1.25X Magnification in Plane-Polarized Light  Thin Section Photo of Sample MIL 090356 at 2.5X Magnification in Plane-Polarized Light  Thin Section Photo of Sample MIL 090356 at 1.25X Magnification in Reflected Light  Thin Section Photo of Sample MIL 090356 at 1.25X Magnification in Cross-Polarized Light 
Thin Section Photo of Sample MIL 090356 at 2.5X Magnification in Cross-Polarized Light  Lab Photo of Sample MIL 090356 Displaying North View 

Writeup from AMN 35(2):

Four previously announced MIL samples that have been classified as "ureilite" (MIL 090340, 090356, 090206, 090805), are being reclassified here to "ungrouped achondrite". They are all very similar to two additional samples — MIL 090963 and MIL 090405 — and may instead represent 6 meteorites that are related to brachinites, based on Ca and Cr content of the olivines, O isotopes, and grain boundary mineralogy (e.g., Warren and Rubin, 2012, LPSC abstract #2528; Goodrich et al., 2012, MetSoc abstract #5272). Although these meteorites may be related to brachinites, they are not true brachinites and so the classification "ungrouped achondrite" will be used until a further change is necessary. We specifically want to call attention to the fact that they are not ureilites so that researchers will not mistakenly request them as such. Concomitantly, we feel that researchers who are interested in brachinites may find these samples of interest and may not have noticed them previously due to the ureilite classification.
Data from:
  Table 0
  Line 0:
Mass (g):3.2
Weathering grade:B
Fayalite (mol%):28-30
Ferrosilite (mol%):10-26
Type spec mass (g):3.2
Type spec location:JSC
Main mass:JSC
Comments:Submitted by AMN
   and collections
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)
Search for this meteorite in the NASA/JSC database (U.S.):   
References: Published in Antarctic Meteorite Newsletter 34(1) (2011), JSC, Houston
Published in Antarctic Meteorite Newsletter 35(2) (2012), JSC, Houston
Published in Meteoritical Bulletin, No. 99, April 2012, MAPS 47, E1-E52 (2012) [published online only]
Published in Meteoritical Bulletin, no. 101, MAPS 50, 1661, September 2015
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     Recommended::   (83° 21' 51"S, 156° 28' 30"E)

     This is 1 of 44248 approved meteorites from Antarctica (plus 3802 unapproved names)
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