Monroe meteorite, Cabarrus Co., North Carolina, USA
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| Latitude & Longitude (WGS84): | 35° 15' North , 80° 30' West |
|---|---|
| Latitude & Longitude (decimal): | 35.25000,-80.50000 |
| Non-native locality type: | Meteorite |
| Meteorite Class: | H4 chondrite meteorite |
| Meteoritical Society Class: | H4 |
| Metbull: | View entry in Meteoritical Bulletin Database |
| KΓΆppen climate type: | Cfa : Humid subtropical climate |
Ordinary Chondrite, brecciated (H4)
Fall, October 31,1849 at 15:00 hours; 8.6 kg
After detonations, a single stone fell near the Flows post office. Total iron (28 wt%) and olivine composition (Fa17.9) are characteristic of ordinary H chondrites (Formerly,'Olivine-bronzite chondrites'.
Ca-poor pyroxene and albitic plagioclase are present as expected. Kamacite and taenite show signs of moderate shock and reheating as both plessite and (lesser amounts of) martensite are present in places. While olivine and pyroxene are well-equilibrated, some variation within chondrule mesostasis is observed. Chondrules have been darkened by shock. This, apparently, explains the very unusual porphyritic olivine chondrule with an iron shell exhibited by Sears (2004).
Approximately 6 kg of the meteorite remained accounted for by 2000. At the present time Arizona State University (Tempe) holds more than half of the mass with the rest being held by ~20 institutions.
Mineral List
8 valid minerals.
Meteorite/Rock Types Recorded
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References
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Merrill, G.P. (1915). On the Monticellite-like Mineral in Meteorites, and on Oldhamite as a meteoritic Constituent. Proceedings of the National Academy of Science 1: 302-308.
Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
Hutchinson, R., Bevan, A.W.R., Eaton, A.J. & Agrell, S.O. (1981)Mineral Chemistry and Genetic Relations Among H-Group Chondrites (1981) Proceedings of the Royal Society of London. Series A. 374 (1757): 171-178. (Feb1981).
Sears, D.W.G. (2004) The Origin of Chondrules and Chondrites: Cambridge University Press: Cambridge, New York, Melbourne, Madrid, Cape Town, Singapore, SΓ£o Paulo, Delhi, Tokyo, Mexico City. 209 pp.
External Links
http://www.lpi.usra.edu/meteor/metbull.php?code=16720 -Monroe@MetBullDatabase
http://www.encyclopedia-of-meteorites.com/test/Monroe_don_edwards.jpg -Monroe photograph
http://www.encyclopedia-of-meteorites.com/test/Monroe_don_edwards.jpg -Monroe photograph
