Volcanic rock While still dominated by silicates, more primitive volcanic rocks have mineral assemblages with less silica, such as olivine and the pyroxenes. Bowen's reaction series correctly predicts the order of formation of the most common minerals in volcanic rocks. Occasionally, a magma may pick up crystals that crystallized from another magma; these crystals are called xenocrysts. Diamonds found in kimberlites are rare but well-known xenocrysts; the kimberlites do not create the diamonds, but pick them up and transport them to the surface of the Earth. Volcanic rocks are named according to both their chemical composition and texture. Basalt is a very
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