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A new type of solar-system material recovered from Ordovician marine limestone

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Listed:
  • B. Schmitz

    (Astrogeobiology Laboratory, Lund University
    Hawai'i Institute of Geophysics and Planetology, University of Hawai'i at Manoa)

  • Q. -Z. Yin

    (University of California at Davis)

  • M. E. Sanborn

    (University of California at Davis)

  • M. Tassinari

    (Astrogeobiology Laboratory, Lund University)

  • C. E. Caplan

    (Hawai'i Institute of Geophysics and Planetology, University of Hawai'i at Manoa)

  • G. R. Huss

    (Hawai'i Institute of Geophysics and Planetology, University of Hawai'i at Manoa)

Abstract

From mid-Ordovician ∼470 Myr-old limestone >100 fossil L-chondritic meteorites have been recovered, representing the markedly enhanced flux of meteorites to Earth following the breakup of the L-chondrite parent body. Recently one anomalous meteorite, Österplana 065 (Öst 65), was found in the same beds that yield L chondrites. The cosmic-ray exposure age of Öst 65 shows that it may be a fragment of the impactor that broke up the L-chondrite parent body. Here we show that in a chromium versus oxygen-isotope plot Öst 65 falls outside all fields encompassing the known meteorite types. This may be the first documented example of an ‘extinct’ meteorite, that is, a meteorite type that does not fall on Earth today because its parent body has been consumed by collisions. The meteorites found on Earth today apparently do not give a full representation of the kind of bodies in the asteroid belt ∼500 Myr ago.

Suggested Citation

  • B. Schmitz & Q. -Z. Yin & M. E. Sanborn & M. Tassinari & C. E. Caplan & G. R. Huss, 2016. "A new type of solar-system material recovered from Ordovician marine limestone," Nature Communications, Nature, vol. 7(1), pages 1-7, September.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms11851
    DOI: 10.1038/ncomms11851
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