[meteorite-list] Campo crystals

[Kieron Heard]

Hi Folks,

Can anyone explain to me the process used to make so-called Campo del Cielo
'crystals'? The usual explanation, that they are made by shattering larger
pieces than have been supercooled with liquid nitrogen, does not convince
me. If that were the case I would expect more geometric forms with sharp
edges. However, many examples are quite rounded and look as though they have
been (recently) molten. I would be grateful for any observations.


Regards, Kieron