M22.20110131

On 28 Apr, 2020 By rosenfel@chass....
  1. RASC M22.20110131;
  2. Northwest Africa 869 (NWA 869), L 4-6 Ordinary Chondrite, “Northwest Africa,” find 2000 (or 2001), 2000 kg;
  3. Anonymous gift 2011 January 31;
  4. 1.1 x 0.93 x 0.77 cm;
  5. 1.41 gr;
  6. Irregular prolate “spherule”;
  7. Pebble, with intact fusion crust and discernible regmaglypts;
  8. Good;
  9. Not previously published;
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    M21.20110131

    On 28 Apr, 2020 By rosenfel@chass....
    1. RASC M21.20110131;
    2. Northwest Africa 6080 (NWA 6080), LL4 Ordinary Chondrite, "Northwest Africa,” find 2008, 6.33 kg;
    3. Anonymous gift 2011 January 31;
    4. 2 fragments: a) 1.025 x 1.0 x 0.5 cm; b) 0.3 x 0.19 x 0.16 cm;
    5. a) 0.667 gr; b) 0.19 gr;
    6. Irregular forms;
    7. a) has one polished face;
    8. Good;
    9. Not previously published;
      1. IMCA EoM www.encyclopedia-of-meteorites.com/meteorite.aspx?id=51489 ;
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    M20.20110131

    On 28 Apr, 2020 By rosenfel@chass....
    1. RASC M20.20110131;
    2. Gao-Guenie, H5 Ordinary Chondrite, Gao and Guenie, Burkina Faso (11° 39' N, 2° 11' W), fall 1960 March 5 (note: the “second” fall date of April 1960 may be spurious), ? kg;
    3. Anonymous gift 2011 January 31; 4. 1.8 x 1.1 x 0.35 cm;
    4. ...
    5. 1.41 gr;
    6. Slice;
    7. ...
    8. Fair;
    9. Not previously published;
      1. Grady (2000), 211;
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    M19.20110131

    On 28 Apr, 2020 By rosenfel@chass....
    1. RASC M19.20110131;
    2. Tatahouine, Diogenite, Tatahouine, Tunisia (32° 57' N, 10° 25' E), fall 1931 June 27, 12 kg;
    3. Anonymous gift 2011 January 31;
    4. 3 fragments:
      1. 0.54 x 0.35 x 0.30 cm;
      2. 0.45 x 0.38 x 0.34 cm;
      3. 0.45 x 0.15 x 0.14 cm;
    5. 0.131 gr.;
    6. Irregular forms;
    7. ...
    8. Stable;
    9. Not previously published;
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      M18.20110131

      On 28 Apr, 2020 By rosenfel@chass....
      1. RASC M18.20110131;
      2. Vaca Muerta, Mesosiderite-A1, Taltal, Antofagasta, Atacama Desert, Chile (25° 45' S, 70° 30' W), find 1861, 3828 kg;
      3. Anonymous gift 2011 January 31;
      4. 10 fragments;
        • longest fragment 27. 0.57 x 0.46 x 0.10 cm;
        • widest fragment 0.549 x 0.50 x 0.16 cm;
        • thickest fragment 0.35 x 0.385 x 0.20 cm;
      5. 0.23 gr.
      6. Irregular forms;
      7. Weathering crusts;
      8. Stable;
      9. Not previously published;
        1. Grady (2000), 508;
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      M17.20110131

      On 28 Apr, 2020 By rosenfel@chass....
      1. RASC M17.20110131;
      2. Admire, Pallasite (PMG), Admire, Lyons Co., Kansas, USA (38° 42' N, 96° 6' W ), find 1881, 180(?) kg;
      3. Anonymous gift 2011 January 31;
      4. 2.10 x 1.49 x 0.20 cm;
      5. 1.176 gr.;
      6. Slice;
      7. Wide faces polished; typical attractive yellow crystalline olivine inclusions in an iron-nickel matrix;
      8. Fragile;
      9. Not previously published;
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        M16.20110131

        On 28 Apr, 2020 By rosenfel@chass....
        1. RASC M16.20110131;
        2. Northwest Africa 4734 (NWA 4734), Achondrite (lunar), “Northwest Africa,” find October 2006, 1.372 kg;
        3. Anonymous gift 2011 January 31;
        4. 0.30 x 0.25 x 0.175 cm;
        5. 0.01 gr.;
        6. Irregular form;
        7. Note: not a monzogabbro;
        8. Good;
        9. Not previously published;
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          M15.20110131

          On 28 Apr, 2020 By rosenfel@chass....
          1. 1. RASC M15.20110131;
          2. 2. Murchison, Carbonaceous chondrite (CM2), Murchison, Victoria, Australia (36° 37' S, 145° 12' E), fall 1969 September 28, 4.5 kg;
          3. 3. Anonymous gift 2011 January 31;
          4. 4. 0.36 x 0.24 x 0.2 cm;
          5. 5. 0.021 gr.;
          6. 6. irregular form;
          7. 7. Colour range: 2.5Y 2.5/1 Black to 5Y 2.5/1 Black, with sparse inclusions at 5Y 8/6 Yellow (Munsell);
          8. 8. Good;
          9. 9. Not previously published;
          10. Grady (2000), 351–352;
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            M14.20110131

            On 28 Apr, 2020 By rosenfel@chass....
            1. RASC M14.20110131;
            2. Whitecourt, Iron, medium octahedrite (IIIAB), Whitecourt, Alberta, Canada (53° 59' 57" N, 115° 35' 51" W ), find 2007 July 1, ca. 70 kg;
            3. Anonymous gift 2011 January 31;
            4. 2 fragments: a) 0.448 x 0.25 x 0.15 cm; b) 0.23 x 0.14 x 0.08 cm;
            5. 0.03 gr;
            6. 14 a irregular lanceolate form; 14 b irregular form;
            7. 14 a & 14 b each have one polished face (treatment happened prior to their separating from a larger mass); weathering rind on other faces;
            8. Stable;
            9. not previously published;
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            M13.20110131

            On 28 Apr, 2020 By rosenfel@chass....
            1. 1. RASC M13.20110131;
            2. 2. Tagish Lake, Carbonaceous chondrite (C2, ungrouped), British Columbia, Canada (59° 42' 16" N, 134° 12' 5" W ), fall 2000 January 18, 10 kg;
            3. 3. Anonymous gift 2011 January 31;
            4. 4. 16+ fragments; range of fragment sizes φ scale=1−3 (Wentworth size class=very coarse sand to fine sand), largest fragment 0.2 x 0.18 x 0.17 cm;
            5. 5. 0.005 gr;
            6. 6. Irregular forms;
            7. 7. Colour range: 5PB 2.5/1 Bluish Black Gley to N 2.5/ Black Gley, with sparse inclusions at 5Y 8/1 White (Munsell);
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