Shallowater meteorite, Lubbock Co., Texas, USA
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|Latitude & Longitude (WGS84):||33° 42' 0'' North , 101° 55' 59'' West|
|Latitude & Longitude (decimal):||33.70000,-101.93333|
|Non-native locality type:||Meteorite|
|Meteorite Class:||Aubrite meteorite|
|Meteoritical Society Class:||Aubrite|
|Metbull:||View entry in Meteoritical Bulletin Database|
|Köppen climate type:||BSk : Cold semi-arid (steppe) climate|
A 4.65 kg. meteorite (aubrite) found in 1936.
Shallowater is the only known unbrecciated, igneous aubrite. It is a coarse-grained orthopyroxenite consisting of (in vol%) poikilitic orthoenstatite crystals (80 vol%) up to 4.5 cm in size which contain, as inclusions and in the interstices, xenoliths of an assemblage of twinned low-Ca clinoenstatite (1), forsterite (2.9 vol%), plagioclase (2.5 vol%), metallic Fe,Ni (3.3), troilite (2.9), schreibersite (0.4), weathered opaques (8 vol%), and traces of niningerite and oldhamite.
A number of mineralogical peculiarities have led Klaus Keil and others to suggest that Shallowater's parent body was different from the parent body of the other aubrite falls.
15 valid minerals.
Meteorite/Rock Types Recorded
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Foshag, William F. (1940). The Shallowater Meteorite, A New Aubrite. American Mineralogist: 25: 779-786.
Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York.
Keil, Klaus, Th. Ntaflos, G. J. Taylor, A. J. Brearley, H. E. Newsom, A. D. Romig Jr. (1989). The Shallowater aubrite: Evidence for origin by planetesimal impacts. Geochimica et Cosmochimica Acta: 53(12): 3291–3307. (December 1989).
Grady, Monica M. (2000). Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge, New York, Oakleigh, Madrid, Cape Town. 690 pages.