Re: [meteorite-list] Rocks from Space Picture of the Day - April 12, 2010
WOW!!! Jeff - Original Message - From: Michael Johnson mich...@rocksfromspace.org To: meteorite-list@meteoritecentral.com Sent: Monday, April 12, 2010 11:43 AM Subject: [meteorite-list] Rocks from Space Picture of the Day - April 12,2010 http://www.rocksfromspace.org/April_12_2010.html --- __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Rocks from Space Picture of the Day - April 12, 2010
Richard wrote: Beautiful Laurence! Jeff K. wrote: WOW!!! http://www.rocksfromspace.org/April_12_2010.html Hello Laurence, Richard, Jeff and List, This is an exceptionally beautiful polysomatic barred olivine chondrule! The unusual pentagonal arrangement of the olivine bars may be the result of a euhedral olivine crystal at the center of these 5 sets of parallel olivine bars. The contours of the (almost) euhedral crystal are still readily recognizable. The crystal itself is either in optical extinction in this photo or it is no longer there. Instead of growing inward from the once molten droplet (which would have resulted in a normal barred olivine chondrule), the bars probably grew along the sides of the (almost) euhedral crystal at its center. *If* I am right with these suppositions, the subhedral crystal at the center had already solidified when the pentagonal bars started growing and thus served as a nucleus along whose sides the bars grew the way we see them in the pic. The different interference colors of the pentagonal bars are due to the fact that they are oriented at different angles to each other. An almost identical polysomatic BO chondrule can be admired on p. 114 of our late Richard Norton's Encyclopedia of Meteorites! Best wishes, Bernd __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
[meteorite-list] Rocks from Space Picture of the Day - April 12, 2010
http://www.rocksfromspace.org/April_12_2010.html --- __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
Re: [meteorite-list] Rocks from Space Picture of the Day - April 12, 2010
Beautiful Laurence! -- Richard Kowalski Full Moon Photography IMCA #1081 --- On Sun, 4/11/10, Michael Johnson mich...@rocksfromspace.org wrote: From: Michael Johnson mich...@rocksfromspace.org Subject: [meteorite-list] Rocks from Space Picture of the Day - April 12, 2010 To: meteorite-list@meteoritecentral.com Date: Sunday, April 11, 2010, 6:43 PM http://www.rocksfromspace.org/April_12_2010.html --- __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list __ Visit the Archives at http://www.meteoritecentral.com/mailing-list-archives.html Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
