siderolite


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siderolite

(ˈsaɪdərəˌlaɪt)
n
(Astronomy) a meteorite consisting of a mixture of iron, nickel, and such ferromagnesian minerals as olivine and pyroxene
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

sid•er•o•lite

(ˈsɪd ər əˌlaɪt)

n.
a meteorite of roughly equal proportions of metallic iron and stony matter.
[1860–65]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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The iridium anomaly seems to be related to a large quantity of siderolite material most likely from a 10-km asteroid that struck Earth 65 million years ago.