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Warrenton meteorite, Warren Co., Missouri, USA

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Carbonaceous Chondrite [CO3.7; S1; W0]
Fall, 3 January 1877

With an accompanying loud whistling sound, a large stone (~45 kg) struck a tree and broke into pieces. Unfortunately most of the material has since been lost. Warrenton is one of only 6 observed CO (Ornans-like) chondrites falls. Moreover, only two petrologic type CO3.7 meteorites (moderately metamorphosed) are known.

The CO chemical group of carbonaceous chondrites are defined by elemental and isotopic ratios and the COs are further distinguished by their small chondrules (usually Olivine-rich) and abundant refractory inclusions. Warrenton’s original complement of such inclusions has been altered. For example, original high temperature Hibonite and Perovskite were largely - if not entirely - replaced on some original homeworld. Nevertheless, Warren’s remaining 1.6 kg contains sufficient ancient refractory inclusions to continue as an occasional object of current scientific research.

Mineral List

18 entries listed. 13 valid minerals.

The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


Mason, B. H. (1962). Meteorites. John Wiley and Sons, Inc.: New York and London.

Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York.

Johnson, C A. & Prinz, M. (1991). Chromite and Olivine in Type II chondrules in carbonaceous and ordinary chondrites: Implications for thermal histories and group differences Geochimica et Cosmochimica Acta 55 (3): 893-904. (Mar 1991)

Greenwood, R. C., Hutchison, R., Huss, G. R. & Hutcheon, I. D. (1992) CAIs in CO3 Meteorites: Parent Body or Nebular Alteration? Meteoritics 27 (3): 229. (July 1992)

Brearley, A. J. & Jones, R. H. (1998) Chondritic Meteorites. In: Planetary Materials (Papike, J. J., Editor): Chapter 3, 398 pages. Mineralogical Society of America: Washington, DC, USA.

Monica M. Grady (2000). Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge, New York, Oakleigh, Madrid, Cape Town.

Chizmadia, J., Rubin, A. E. & Wasson, J. T. (2002). Mineralogy and petrology of amoeboid olivine inclusions in CO3 chondrites: relationship to parent-body aqueous alteration. Meteoritics & Planetary Science 37 (12): 1781-1796 (Dec 2002)

Grady, M. M., Pratesi, G. & Moggi-Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pages.

External Links

Meteoritical Society’s “Meteoritical Society Database” <" rel="nofollow">http://www.lpi.usra.edu/meteor/metbull.php>

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