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  2. CI chondrite - Wikipedia

    en.wikipedia.org/wiki/CI_chondrite

    CI chondrites, also called C1 chondrites or Ivuna-type carbonaceous chondrites, are a group of rare carbonaceous chondrite, a type of stony meteorite. They are named after the Ivuna meteorite, the type specimen. CI chondrites have been recovered in France, Canada, India, and Tanzania.

  3. Carbonaceous chondrite - Wikipedia

    en.wikipedia.org/wiki/Carbonaceous_chondrite

    Carbonaceous chondrites or C chondrites are a class of chondritic meteorites comprising at least 8 known groups and many ungrouped meteorites. They include some of the most primitive known meteorites. The C chondrites represent only a small proportion (4.6%) [1] of meteorite falls.

  4. Chondrite - Wikipedia

    en.wikipedia.org/wiki/Chondrite

    CM chondrites are composed of about 70% fine-grained material (matrix), and most have experienced extensive aqueous alteration. The much studied Murchison meteorite, which fell in Australia in 1969, is the best-known member of this group. CO chondrites have only about 30% matrix and have experienced very little aqueous alteration.

  5. CM chondrite - Wikipedia

    en.wikipedia.org/wiki/CM_chondrite

    The CM group most resembles the CI and CO chondrites; a CM–CO is sometimes described. [7] [8] [9] All three groups contain clearly anomalous 50 Ti and 54 Cr isotopes. [10] [11] Though the C-chondrites are far rarer than ordinary chondrites, the CM group is "the most abundant type of" them.

  6. Chondrule - Wikipedia

    en.wikipedia.org/wiki/Chondrule

    Because ordinary chondrites represent 80% of the meteorites that fall to earth, and because ordinary chondrites contain 60–80% chondrules, it follows that (excluding dust) most of the meteoritic material that falls on earth is made up of chondrules. Chondrules can range in diameter from just a few micrometers to over 1 centimetre (0.39 in).

  7. Geochemistry - Wikipedia

    en.wikipedia.org/wiki/Geochemistry

    In chondritic mixing models, the compositions of chondrites are used to estimate planetary compositions. For example, one model mixes two components, one with the composition of C1 chondrites and one with just the refractory components of C1 chondrites.

  8. Orgueil (meteorite) - Wikipedia

    en.wikipedia.org/wiki/Orgueil_(meteorite)

    Nagy B, Claus G, Hennessy DJ (1962) Organic Particles Embedded in Minerals in Orgueil and Ivuna Carbonaceous Chondrites. Nature 193 (4821) p. 1129 Fitch FW, Anders E (1963) Organized Element - Possible Identification in Orgueil Meteorite.

  9. Allende meteorite - Wikipedia

    en.wikipedia.org/wiki/Allende_meteorite

    Carbonaceous chondrites compose about 4 percent of all meteorites observed to fall from space. Prior to 1969, the carbonaceous chondrite class was known from a small number of uncommon meteorites such as Orgueil, which fell in France in 1864. Meteorites similar to Allende were known, but many were small and poorly studied. [3]