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| Cimarron | |||||||||||||
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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 | ||||||||||||
| Classification history: |
This is 1 of 622 approved meteorites classified as CM2. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites | ||||||||||||
Writeup |
Writeup from MB 87:
Cimarron 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. | ||||||||||||
| Institutions 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 XI, 2101 NASA Parkway, NASA Johnson Space Center, Houston, TX 77058, United States; Website (institutional address; updated 28 Jul 2022) NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 87, MAPS 38, A189-A248 (2003)
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Geography:
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Statistics: This is 1 of 147 approved meteorites from Kansas, United States (plus 1 unapproved name) (plus 1 impact crater) This is 1 of 1894 approved meteorites from United States (plus 890 unapproved names) (plus 28 impact craters) | ||||||||||||
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