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St. Genevieve meteorite, St. Genevieve Co., Missouri, USA

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Latitude & Longitude (WGS84): 37° 58' North , 90° 19' West
Latitude & Longitude (decimal): 37.9666666667, -90.3166666667
Non-native locality type:Meteorite
Other regions containing this locality:North America

Iron meteorite, Octahedrite (IIIF, Og)
Find, 1888; 244.5 kg

An iron meteorite (Ni ~7.7%) was found in 1888 in the extreme western part of the county. After several public displays it was eventually purchased by Ward who sold sections to various museums. Underneath the weathered surface, Kamacite lamellae predominate within the sections with abundant Neumann bands. Plessite and taenite (40%) are also prominent. Schreibersite (in several morphologies), troilite, and daubréelite are the most obvious minor accessories.

The two largest masses are held at the Field Museum in Chicago (106 kg) and the University of Arizona State (58 kg). St. Genevieve County is the most massive of the IIIF iron meteorites, a very small iron group with only 9 members.

Mineral List

5 valid minerals.

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Buchwald, V. F. (1975) Handbook of Iron Meteorites. University of California Press. 1418 pages.

Kracher, A., Willis, J., Wasson, J.T., 1980. Chemical classification of iron meteorites—IX. A new group (IIF), revision of IAB and IIICD, and data on 57 additional irons. Geochim. Cosmochim. Acta 44, 773–787.

Grady, M. M. (2000) Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge, New York, Oakleigh, Madrid, Cape Town. 690 pages.

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