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Hamlet meteorite, Starke Co., Indiana, USA

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Latitude & Longitude (WGS84): 41° 22' 59'' North , 86° 36' 0'' West
Latitude & Longitude (decimal): 41.38333,-86.60000
Non-native locality type:Meteorite
Meteorite Class:LL4 chondrite meteorite
Meteoritical Society Class: LL4
Metbull:View entry in Meteoritical Bulletin Database
Köppen climate type:Dfa : Hot-summer humid continental climate

Ordinary chondrite, brecciated (LL4; S4; W0,W2)
Fell, 13 October 1959; 3.705 kg

A 2.045 kg conical stone stuck a home and was found in the yard 30 minutes later. A second stone was recovered from a farm pasture in 1963. The stone is a clearly brecciated meteorite with diverse clasts that are both chondrule-rich and recrystallized within a chondritic host. Chondrules, both olivine-rich and pyroxene-rich (BO, PO, POP, RP) range in size from ~ 0.4—1.5 mm. Olivine (Fa22) and orthopyroxene are dominant with Fe-Ni metal, troilite, and a few other minor opaques. Total iron (~20 wt%) is characteristic of the LL ordinary chondrite group (very low in total iron). The unexpected presence of nepheline indicates some unusual chemistry for this particular meteorite. A cosmic ray exposure age of ~ 40.6 Ma has been reported.

Hamlet is one of only 88 witnessed LL falls and one of only 7 falls listed exactly as an LL4 with The Meteoritical Bulletin Database (Tally of late January 2016). The LL group of ordinary chondrites account for somewhat less than 10% of all meteorite falls.

Major portions of the two stones have been kept at the Field Museum of Natural History (Chicago) and the U.S. National Museum (Washington), respectively.

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.

Mineral List

12 valid minerals.

Meteorite/Rock Types Recorded

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Krinov, E. L. - Editor (1960) The Meteoritical Bulletin, No. 17. Moscow.
Krinov, E. L. - Editor (1965) The Meteoritical Bulletin, No. 34. Moscow.
Mason, B. (1963) Olivine in ordinary chondrites. Geochimica et Cosmochimica Acta 27(9): 1011-1023. (Sept 1963).
Fuchs, L.H. (1968) X-ray crystallographic evidence for the meteoritic occurrence of nepheline. Earth and Planetary Science Letters 5(3): 187-190.
Fuchs, L.H. (1969) The Phosphate Mineralogy of Meteorites: IN: Meteoritic Research: Millman, P.M.-Ed.: pp. 683-695.D. Reidel Publishing Company: Dordrecht-Holland.
Ramdohr, P. (1973) The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
Rubin, A. (1990) Olivine & Kamacite in Ordinary Chondrites: Intergroup and Intragroup relationships. Geochimica et Cosmochimica Acta 54: 1217-1230.
Rubin, A.E. (1994) Metallic copper in ordinary chondrites. Meteoritics 29 (1): 93-98. (Jan 1994).
Dunn, T.L., Cressy, G., McSween Jr, H.Y. & McCoy, T.J. (2010) Analysis of ordinary chondrites using powder X-ray diffraction: 1. Modal mineral abundances. MAPS 45(1):123-134. (Jan 2010).
Grady, M.M. (2000). Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge; New York; Oakleigh; Madrid; Cape Town. 689 pages.
Grady, M.M., Giovanni Pratesi, G. & Moggi-Cecchi. V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pages.

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