Barringer Crater
I.M.C.A #2215

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NWA 3159 EUCRITE
A spectacular piece of NWA 3159, a 10.7-gram individual. This is no.3 in my collection because there are already two breathtaking cut slices clearly showing the two distinct lithologies:

  1. The black, shock-melted, vesicular areas
  2. The "normal" brecciated eucritic areas

I was wondering if I could also find the vesicular texture in an individual, and, I did find such areas. But, then, I held my breath when I also spotted a beautiful crystal aggregate of...maybe olivine or pyroxene under my micro- scope at 16x and 32x magnification!

Yes, I know that olivine is not usually found in eucrites but it has been found in small amounts in NWA 011, in Macibini, in NWA 049, in NWA 1000, etc.

Mount Tazerzait and Baszkówka have taught us that such crystals can survive the meteorite's fiery descent through our atmosphere (if properly shielded). But these crystals in my NWA 3159 individual are not really within the meteorite's interior matrix but protrude from one of its vesicular cavities, in other words, they may have been exposed to the atmospheric forces *IF* they should be pre- terrestrial.


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