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Roosevelt County 075
Basic information Name: Roosevelt County 075
     This is an OFFICIAL meteorite name.
Abbreviation: RC 075
Observed fall: No
Year found: 1990
Country: United States
Mass:help 258 g
Meteoritical Bulletin:  MB 74  (1993)  H3.2
NHM Catalogue:  5th Edition  (2000)  H3.2
MetBase:  v. 7.1  (2006)  H3.2
Recommended:  H3.10    [explanation]

This is 1 of 5 approved meteorites classified as H3.10.   [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Revised 1 Sep 2007: Reclassified by Grossman and Brearley (2005)
Writeup from MB 74:
Warning: the following text was scanned and may contain character recognition errors. Refer to the original to be sure of accuracy.

Roosevelt County 075

New Mexico, USA

Found 1990 April

Unequilibrated ordinary chondrite (H3.2, S2)

A single stone of 258 g was found by a home owner near the town of Portales (Section 36 R33E T1S). It was discovered the morning after a rock fight in front of the house, probably having been thrown there during the fight. It is heavily weathered (almost total loss of metal and troilite) and thus cannot be a fresh fall. Silicates highly unequilibrated, classification as H-chondrite indicated by oxygen isotopes and the estimated original Fe,Ni metal content, petrologic subtype 3.2 is suggested by the degree of olivine heterogeneity and induced TL, McCoy et al. (1993). Information, Tim J. McCoy, Planetary Geosciences Division, University of Hawaii-Manoa, Honolulu, Hawaii 96822, USA. Main mass, Ivan E. Wilson.

References: Published in Meteoritical Bulletin, no. 74, Meteoritics 28, 146-153 (1993)
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United States
     Catalogue of Meteorites:   (34° 11'N, 103° 26'W)
     Recommended::   (34° 11'N, 103° 26'W)

     This is 1 of 228 approved meteorites from New Mexico, United States (plus 2 unapproved names) (plus 1 impact crater)
     This is 1 of 1924 approved meteorites from United States (plus 867 unapproved names) (plus 28 impact craters)
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