Paying for Northwest Vista College Northwest Vista College is public, 2-4 years school located in San Antonio, Texas. The 2017 undergraduate tuition & fees of Northwest Vista College are $5,824 for Texas residents and $11,274 for out of State students.
Most active volcanoes are strung like beads along, or near, the margins of the continents, and more than half en circle the Pacific Ocean as a Ring of Fire. Many volcanoes are in and around the Mediterranean Sea. Mount Etna in Sicily is the largest and hiqhest of these mountains. Italy's Vesuvius is the only active volcano on the European mainland.
Most volcanoes occur along plate margins or at 'hotspots' in the earth's crust.Volcanoes are openings in the earth's crust that spew out molten lava,ash,steam and gas. Deep beneath every volcano lies a reservoir of molten rock called a magma chamber. just now. Report Abuse. Volcanoes occur where magma rises through the Earth's crust and reaches the surface. To do this, the magma must find a weakness in the crustal rocks on either the land or under the sea. Most of the volcanoes occur at, or close to, the edges of tectonic plates.