Buffalo Head Hills kimberlite field grained, and well bedded, with high bedding angles. The reworked kimberlite is well sorted, distinctly bedded, and contains abraded olivine grains. Multiple layers of pyroclastic and reworked kimberlite separated by layers of marine mudstone are present at some pipes. These represent a series of discrete kimberlite eruption events separated by quiescent periods during which the muds were deposited. The majority of the BHH kimberlites are diamondiferous, in contrast to those of the Birch Mountains kimberlite field to the northeast which are mostly barren of diamonds. Based on petrography and whole-rock geochemistry, the BHH pipes are classed as Group 1A kimberlites.
Latin Grammy Award for Best Rock Album Latin Grammy Award for Best Rock Album The Latin Grammy Award for Best Rock Album is an honor presented annually by the Latin Academy of Recording Arts & Sciences at the Latin Grammy Awards, a ceremony that recognizes excellence and promotes a wider awareness of cultural diversity and contributions of Latin recording artists in the United States and internationally. According to the category description guide for the 2012 Latin Grammy Awards, the award is for vocal or instrumental rock albums containing at least 51 percent of newly recorded material. It is awarded to solo artists, duos or groups. The accolade