GEOLOGY

Detailed explanation-1: -The most majestic of the volcanoes are composite volcanoes, also known as strato-volcanoes. Composite volcanoes are tall, symetrically shaped, with steep sides, sometimes rising 10, 000 feet high. They are built of alternating layers of lava flows, volcanic ash, and cinders.

Detailed explanation-2: -Stratovolcanoes are more likely to produce explosive eruptions due to gas building up in the viscous magma. Andesite (named after the Andes Mountains), is perhaps the most common rock type of stratovolcanoes, but stratovolcanoes also erupt a wide range of different rocks in different tectonic settings.

Detailed explanation-3: -Composite or Stratovolcanoes (Fig. 5.14) erupt both lava and pyroclastic deposits. The slopes of stratovolcanoes are therefore composed of lava flows alternating with layers of pyroclastic deposits.

Detailed explanation-4: -Some of the Earth’s grandest mountains are composite volcanoes–sometimes called stratovolcanoes. They are typically steep-sided, symmetrical cones of large dimension built of alternating layers of lava flows, volcanic ash, cinders, blocks, and bombs and may rise as much as 8, 000 feet above their bases.

Detailed explanation-5: -Composite cones experience many eruptions, as well as many different types of eruptions, during their history and evolution. Eruptions may be phreatic, phreatomagmatic, and magmatic. Phreatic and phreatomagmatic eruptions are especially common on snow-covered or glaciated peaks.