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Speciality Forums >> Space Rocks

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ZielkeNightsky
Pooh-Bah
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Reged: 10/01/06

Loc: Denmark
Any special nomenclature for this ? new
      #5936921 - 06/23/13 06:44 PM

Hi there

Got a nice slap of a NWA H4.

Wonder if feature like this larger "chondrule" has any special nomenclature?





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bob71741
scholastic sledgehammer
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Reged: 02/16/08

Re: Any special nomenclature for this ? new [Re: ZielkeNightsky]
      #5939617 - 06/25/13 12:05 PM

if you look in Norton's "Field Guide to Meteors and Meteorites" in chapter four,A Chondrule Gallery, you can see some examples and some of the nomenclature used, but mostly as descriptors; fragmented, radial, fine grained, dark matrix, polyphyritic, granular, etc..
Your specimen has some radialness to it from some of the different grains, but only with some imagination.

I'm really surprised that with over 200 views that someone could not say "yes", "no", or whatever. I'm only a novice at this so take my response with some chondrule grains.


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ZielkeNightsky
Pooh-Bah
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Reged: 10/01/06

Loc: Denmark
Re: Any special nomenclature for this ? [Re: bob71741]
      #5940121 - 06/25/13 04:42 PM

Hi Bob, thanks for the info. I've just ordered the book.

-----
I've being digging in the literature and I came up with this:

Radial pyroxene chondrule, a compound chondrule, which was formed by a collision with a second, still plastic chondrule.

Found is this book:
Chondrule formation and accretion processes in the early solar nebula - Clues from noble gases in different constituents of unequilibrated chondrites


http://e-collection.library.ethz.ch/view/eth:26488

Page 24, Examples from Krymka, Photo B, left

I have no idea if it's pyroxene

Another photo with much better white balance.



(I really need to rebuild my USB microscope with daylight LEDs)


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ZielkeNightsky
Pooh-Bah
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Reged: 10/01/06

Loc: Denmark
Re: Any special nomenclature for this ? new [Re: ZielkeNightsky]
      #5994923 - 07/28/13 03:05 PM

Hi Bob

Norton's "Field Guide to Meteors and Meteorites", what a great book. Just finished reading it.


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