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Comments on Gigapan: Anorthosite Xenolith


Gigapan Comments (2)

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  1. Ron Schott

    Ron Schott (September 13, 2011, 11:26AM )

    Whether a xenolith gets cooked (metamorphosed) or not depends on a number of factors. It's certainly common for many xenoliths (but not all) to have at least a little contact metamorphism at their margins and some are pervasively metamorphosed. I don't recall seeing any evidence of metamorphism in this particular xenolith, but I didn't linger and examine it as much as I would have liked to.

  2. Chris Fastie

    Chris Fastie (September 13, 2011, 10:58AM )

    So is a xenolith generally going to be metamorphosed in the process of being surrounded by magma? If so, is this a metanorthosite xenolith?