Birch Mountains kimberlite field Birch Mountains kimberlite field The Birch Mountains kimberlite field is a cluster of kimberlitic volcanic pipes or diatremes in north-central Alberta, Canada that were emplaced during a period of kimberlitic volcanism in the Late Cretaceous epoch. As of 2011, 8 diatremes had been discovered in the field, and diamonds and microdiamononds had been recovered during sampling programs. The Birch Mountain (BM) kimberlite field was discovered in 1998 and lies about north of Edmonton and northwest of Fort McMurray. It is part of the Northern Alberta kimberlite province, along with the Buffalo Head Hills kimberlite field and the Mountain Lake cluster.
Grammy Award for Best Rock Instrumental Performance to Paul McCartney and the band Wings for "Rockestra Theme". From 1986 to 1989, the category was known as Best Rock Instrumental Performance (Orchestra, Group or Soloist). According to the category description guide for the 52nd Grammy Awards, the award is presented to artists "for newly recorded rock, hard rock or metal instrumental performances". As of 2011, Jeff Beck holds the records for the most wins, with six. Sting has received three awards, twice as a member of The Police -- although he had no part in the band's "Behind My Camel", the 1982 award winner which he did not