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Richardton meteorite : ウィキペディア英語版 | Richardton meteorite
The Richardton meteorite is a H5 Ordinary chondrite that was seen to fall at 21:48 on 19 June 1918 between Mott, North Dakota and Richardton, North Dakota, United States. Pieces were found in a strewn field of about by centred on and oriented north-south.〔 pieces of this meteorite were for sale online at up to /g. In 1960 John Reynolds discovered that the Richardton meteorite had an excess of 129Xe, a result of the presence of 129I in the solar nebula. ==Mineralogy==
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