GEOLOGY

Detailed explanation-1: -Stratovolcano. Stratovolcanoes have relatively steep sides and are more cone-shaped than shield volcanoes . They are formed from viscous, sticky lava that does not flow easily. The lava therefore builds up around the vent forming a volcano with steep sides.

Detailed explanation-2: -Composite volcanoes, also known as stratovolcanoes, are steep-sided, symmetrical cones formed when pyroclastic eruptions (explosions of ash, cinders, and rock fragments) alternate with lava flows and layers build up over time. They usually have a central vent or a cluster of vents in a crater at their summit.

Detailed explanation-3: -The fluid melts some of the silica-rich minerals in the overlying material producing dark, silica-poor basaltic magma. The basaltic melt migrates upwards and becomes more silica-rich it melts its way toward the surface. Sticky, silica-rich magma erupts at the surface forming steep-sided volcanoes.

Detailed explanation-4: -Stratovolcano: A large, steep-sided, symmetrical cone built of alternating layers (strata) of lava, ash, cinders, blocks, and bombs. Also called composite volcano, these stratovolcanoes form some of Earth’s grandest mountains rising as much as 8, 000 feet above their bases (movie).

Detailed explanation-5: -The steepest cones form around cinder cone volcanos. Cinder cones form from ash and magma cinders–partly-burned, solid pieces of magma, that fall to the ground following a volcanic eruption. This type of eruption contains little lava, as the magma hardens and breaks into pieces during the explosion.