Thanks for watching....br Abra Granadabr br Acotango br br Anallajsibr br br Asu Asuni br br Capuratabr br Ch'iyar Qullu br br Colluma br br Escala br br Guayaquesbr br Iru Phutunqu br br Jayu Qutabr ) br br Jitiri br br Jorcada br br Laram Q'awabr br Kunturiribr br Licancaburbr br Lípez br br Michinchabr br Moiro (or: Cerro Negro)br br Nuevo Mundo br br Olca br br Ollagüe br br Paquni br br Pampa Luxsarbr br Parina Qutabr br Cerro Parumabr br Parumabr br Patilla Patabr br Pomerape br br Cerro Pumiri br br Quetena br br Sacabaya (or:Quemado)br br Sairecabur br br Sajama br br San Agustínbr br Santa Isabelbr br Sirk'i br br Cerro Saxanibr br Tata Sabayabr br Tocorpuribr br Tunupa br br Umurata br br Uqi Uqinibr br Uyarani br br Uturunkubr br Wila Pukaranibr br Yumia br br Zapaleribr br Source:br br Music: Alright,Silent Partner; YouTube Audio Librarybr br A volcano is a rupture on the crust of a planetary mass object, such as the Earth, which allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.br br Earth's volcanoes occur because the planet's crust is broken into 17 major, rigid tectonic plates that float on a hotter, softer layer in the Earth's mantle. Therefore, on Earth, volcanoes are generally found where tectonic plates are diverging or converging. For example, a mid-oceanic ridge, such as the Mid-Atlantic Ridge, has volcanoes caused by divergent tectonic plates pulling apart; the Pacific Ring of Fire has volcanoes caused by convergent br tectonic plates coming together. Volcanoes can also form where there is stretching and thinning of the crust's interior plates, e.g., in the East African Rift and the Wells Gray-Clearwater volcanic field and Rio Grande Rift in North America. This type of volcanism falls under the umbrella of "plate hypothesis" volcanism. Volcanism away from plate boundaries has also been explained as mantle plumes. These so-called "hotspots", for example Hawaii, are br postulated to arise from upwelling diapirs with magma from the core–mantle boundary, 3,000 km deep in the Earth. br br Volcanoes are usually not created where two tectonic plates slide past one another.br br Erupting volcanoes can pose many hazards, not only in the immediate vicinity of the eruption. One such hazard is that volcanic ash can be a threat to aircraft, in particular those with jet engines where ash particles can be melted by the high operating temperature; the melted particles then adhere to the turbine blades and alter their shape, disrupting the operation of the turbine.