Ultramafic rock but there are ultrapotassic and highly silica-under-saturated rocks with >18% MgO which can be considered "ultramafic". Ultrapotassic, ultramafic igneous rocks such as lamprophyre, lamproite and kimberlite are known to have reached the surface of the Earth. Although no modern eruptions have been observed, analogues are preserved. Most of these rocks occur as dikes, diatremes, lopoliths or laccoliths, and very rarely, intrusions. Most kimberlite and lamproite occurrences occur as volcanic and subvolcanic diatremes and maars; lavas are virtually unknown. Vents of Proterozoic lamproite (Argyle diamond mine), and Cenozoic lamproite (Gaussberg, Antarctica) are known, as are vents of Devonian lamprophyre (Scotland). Kimberlite
Latin Grammy Award for Best Rock Solo Vocal Album Latin Grammy Award for Best Rock Solo Vocal Album The Latin Grammy Award for Best Rock Solo Vocal Album was an honor presented annually at the Latin Grammy Awards, a ceremony conducted by the Latin Academy of Recording Arts & Sciences to "recognize excellence and create a wider awareness of the cultural diversity" and contributions of Latin recording artists in the United States and internationally. According to the category description guide for the 2009 Latin Grammy Awards, the award was given to vocal rock, hard rock or metal albums containing at least 51 percent of newly recorded material. It was