Petrograph
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Link to all Petrographs

2010 and newer Petrographs
2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000
1990 - 1999 Petrographs
1980 - 1989 Petrographs
1970 - 1979 Petrographs
1960 - 1969 Petrographs
1957 - 1959 Petrographs
Petrograph Evolution video

2009



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2008



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2007



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2006



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2005



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2004



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2003



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2002



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2001



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July and August

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2000



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