Richardton meteorite
TypeChondrite
ClassOrdinary chondrite
GroupH5
CountryUnited States
RegionRichardton, North Dakota
Coordinates46°37′30″N 102°16′17″W / 46.62500°N 102.27139°W / 46.62500; -102.27139
Observed fallYes
Fall date1918-06-30
TKW90 kilograms (200 lb)
Strewn fieldYes
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The Richardton meteorite is a 90 kilograms (200 lb) H5 Ordinary chondrite that was seen to fall at 21:48 on 30 June 1918 between Mott, North Dakota and Richardton, North Dakota, United States.[1][2]

Pieces were found in a strewn field of about 9 miles (14 km) by 5 miles (8.0 km) centred on 46°37′30″N 102°16′17″W / 46.62500°N 102.27139°W / 46.62500; -102.27139 and oriented north–south.[2] As of December 2012 pieces of this meteorite were for sale online at up to US$80/g.[3]

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.[4][5]

Mineralogy

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Classification

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See also

References

  1. ^ "Richardton". Meteoritical Bulletin Database. Meteoritical Society. Retrieved 24 December 2012.
  2. ^ a b Quirke, T. T. (Sep–Oct 1919). "The Richardton Meteorite". The Journal of Geology. The University of Chicago Press. 27 (6): 431–448. Bibcode:1919JG.....27..431Q. doi:10.1086/622670. JSTOR 30057982.
  3. ^ "Richardton". Meteorites and Related Geology Specimens for Sale. New England Meteoritical Services. Retrieved 24 December 2012.
  4. ^ Reynolds, J. (31 March 1960). "Isotopic Composition of Primordial Xenon". Physical Review Letters. 4 (7): 351–354. Bibcode:1960PhRvL...4..351R. doi:10.1103/PhysRevLett.4.351.
  5. ^ "John Hamilton Reynolds, 77; Improved Study of Cosmic Ages". Retrieved 25 December 2012.

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