On 27 Apr, 2020 By rosenfel@chass....
  1. RASC M4.20090712;
  2. Gibeon, IVA fine octahedrite, Namibia (S 25° 30 ́, E 18° 0 ́), found 1836, ca. 26 mt;
  3. Anonymous gift 2009 July 12;
  4. 2.28 x 0.62 x 0.94 cm;
  5. 6.5 g;
  6. Etched slice;
  7. Fusion crust¹ on longest side;
  8. Fair state of preservation; some rust spots;
  9. Not previously published;
    1. Grady, M.M. (2000). Catalogue of Meteorites, with Special Reference to those Represented in the Collection of the Natural History Museum, London (5th ed.). Cambridge: Cambridge University Press, p.214;
    2. IMCAEM: www.encyclopedia-of-meteorites.com/meteorite.aspx?id=10912 ;
    3. MB 36 (1966), 2 (Nico, paired);
    4. MBDB: http://tin.er.usgs.gov/meteor/metbull.php?code=10912
¹ The speculation regarding the presence of traces of a fusion crust may be misplaced (Rosenfeld, R.A. (2009). RASC Catalogue of Meteorites. JRASC, 103, 210). In both cases it is more likely to be a weathering crust.

The RASC M4 meteorite (left) and an enlargement (x30) of its fusion crust (right).

 

Inventory #: 
M4.20090712
Sort #: 
M0004
General Type: 
Meteorite
Parent Body: 
Other
Type: 
Octahedrite
Official Name: 
Gibeon
Origin: 
Namibia
Weight: 
6.500 grams