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 Song Latin Grammy Award for Best Rock Song The Latin Grammy Award for Best Rock Song is an honor presented annually at the Latin Grammy Awards, a ceremony that recognizes excellence and creates a wider awareness of cultural diversity and contributions of Latin recording artists in the United States and internationally. The award is reserved to the songwriters of a new song containing at least 51% of the lyrics in Spanish. Instrumental recordings or cover songs are not eligible. Songs in Portuguese may be entered in the Brazilian field. The award has been given every year since the 1st Latin Grammy