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Basic information Name: Cimarron
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 1948
Country: United States
Meteoritical Bulletin:  MB 87  (2003)  CM2
MetBase:  v. 7.1  (2006)  CM2
Recommended:  CM2    [explanation]

This is 1 of 540 approved meteorites classified as CM2.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites
Writeup from MB 87:


Gray County, Kansas, USA

Found ~1948

Carbonaceous chondrite (CM2)

A single stone of unknown weight was found by a rancher on a farm 3.4 miles north of Cimarron and sent to the University of Kansas in the early 1950s. A piece was later acquired by a meteorite collector and samples given to NAU in 1998 and pieces to AMNH in 1992 and 1993. Classification and mineralogy (M. Zolensky JSC; T. Bunch NAU): olivine ranges from Fa1 to Fa64, with a peak at Fa1–2, average Fa1.2, PMD 11%. Low Ca pyroxene ranges from Fs2Wo5 to Fs5Wo4, also present are diopside, enstatite-diopside, pigeonite, and chromite. Porphyritic olivine, barred olivine and granular olivine crystals are most abundant, maximum chondrule diameter is 2 mm. Chondrules are sparse, matrix and chondrule rims comprise ~85 vol% of the meteorite. The percentage of matrix is similar to that of Bells and Nogoya, but the composition of these is lower in S and Mg, and higher in Si; this could be due to terrestrial weathering. Specimens: type specimen 21 g AMNH; 7.1 g NAU.

   and collections
AMNH: Department of Earth and Planetary Sciences, American Museum of Natural History, Central Park West, New York, NY 10024, United States (institutional address; updated 18 May 2013)
JSC: Mailcode KT, 2101 NASA Parkway, NASA Johnson Space Center, Houston, TX 77058, United States; Website (institutional address; updated 3 Sep 2013)
NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
References: Published in Meteoritical Bulletin, no. 87, MAPS 38, A189-A248 (2003)
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United States
     Recommended::   (37° 51'N, 100° 21'W)

     This is 1 of 145 approved meteorites from Kansas, United States (plus 1 unapproved name) (plus 1 impact crater)
     This is 1 of 1857 approved meteorites from United States (plus 890 unapproved names) (plus 28 impact craters)
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