Garnett meteorite, Anderson Co., Kansas, USA
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| Latitude & Longitude (WGS84): | 38° 16' North , 95° 15' West |
|---|---|
| Latitude & Longitude (decimal): | 38.26667,-95.25000 |
| 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 (H4)
Find, 1938; 4.8 kg
A weathered meteorite stone was plowed up in 1937 and recognized as a meteorite in 1938. Inspections reveal chondrules, clasts and Fe-Ni grains within a dark matrix transected by weathered veins. Total iron (24. wt%), equilibrated olivine (Fa20) and nearly equilibrated low Ca-pyroxene are all characteristic of H-group chondrites. Mineralogically, the meteorite consists primarily of dominant olivine accompanied by pyroxene along with minor troilite and Fe-Ni metal. Accessory chromite and small amounts of copper and ilmenite are also present.
A cosmic ray exposure (CRE) age of 6.5 Ma has been reported. This suggests that Garnet may be a fragments of an intermediate parent body (IPA) which has produce a large fraction of the current stream of H-group meteoroids in earth-crossing orbits. [Almost half of recovered H-group chondrites have CRE ages in the 6-10 Ma range.]
As with many meteorites recovered with the assistance of Harvey Nininger, a significant portion of the Garnett meteorite is now at Arizona State University's Center for Meteorite Studies [1372.9 g in 2017].
Mineral List
6 valid minerals.
Meteorite/Rock Types Recorded
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References
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Nininger, H. H. (1950) The Nininger collection of meteorites: Popular Astronomy 58: 267-277.
Nininger, H.H. (1952) Out of the Sky. Dover. 336 pages.
Mason, B. (1963) Olivine Composition in Chondrites: Geochimica et Cosmochimica Acta 27(9): 1011-1023. (Sept 1963).
Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
Graham, A.L., Bevan, A.W. R. & Hutchison, B. (1985) Catalogue of Meteorites (4/e). University of Arizona Press: Tucson.
Graf, Th. & Marti, K. (1995) Collisional history of H chondrites. J. Geophys. Res. (Planets) 100, 21247β21263. (Oct 1995).
Grady, M.M. (2000). Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge; New York; Oakleigh; Madrid; Cape Town. 689 pages.
Grady, M.M., Pratesi, G. & Moggi-Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pages.
External Links
http://www.lpi.usra.edu/meteor/metbull.php - MeteoriticalBulletinDatabase
http://www.lpi.usra.edu/meteor/metbull.php?code=10862 - Garnett@MetBullDatabase
http://www.encyclopedia-of-meteorites.com/test/10862_12929_2745.jpg - Garnett specimen from Monnig Collection
http://www.lpi.usra.edu/meteor/metbull.php?code=10862 - Garnett@MetBullDatabase
http://www.encyclopedia-of-meteorites.com/test/10862_12929_2745.jpg - Garnett specimen from Monnig Collection
