Vaca Muerta Meteorite Polished Slice from Chile - an 8.3 gram Specimen


The Vaca Muerta (Dead Cow in Spanish) Meteorite was discovered in 1861 in the Atacama Desert, Chile. Classified as a stony-iron, Mesosiderite-MES-A1, the Vaca Muerta is a differentiated silicate and metal rich meteorite that contains silicate and eucrite inclusions. This slice's polished surface displays this meteorite's varied and disrupted matrix. It indicates the Vaca Muerta parent body must have been impacted countless times by different types of material to break up, mix, and fuse the various constituent pieces, as displayed in the image below. 

Mesosiderite meteorites are a rare type of meteorite; as of November 2014 only 208 are known (of which 56 come from Antarctica) and only 7 of these are observed falls. Although rare, they also among the largest meteorites found.

  • Stony-iron, Mesosiderite – MES-A1
  • Atacama Desert, Chile (25°45' S, 70°30' W) - unobserved fall
  • 8.3 grams - 0.29 ounces
  • 32.5 x 17.8 x 6.2 mm  (1.2 x 0.70 x 0.24 inches)
  • Polished slice in a chocolate-hued patina showing its silicate and eucrite inclusions

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