GEOLOGY

Detailed explanation-1: -Stratovolcanoes or composite cones are formed from a combination of eruptions. First the volcano will have an explosive eruption that ejects huge amounts of steam, gas and ash. This will be followed by the ejection of lava. A large stratovolcano will be built with many layers of ash and lava.

Detailed explanation-2: -A quiet eruption of low-viscosity lava produces a wide, flat volcano called a shield volcano. If an eruption is entirely ash and cinders, the result will be a small, steep-sided volcano called a cinder cone.

Detailed explanation-3: -While composite volcanoes erupt less frequently than the other types of volcanoes, they sure make up for it, packing quite a punch with each blast. The lava from a composite volcano is less fluid, and the thick mixture of minerals it contains are highly explosive. The results are very dangerous, and often deadly.

Detailed explanation-4: -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. Famous composite volcanoes include Mount Fuji in Japan, Mount Shasta and Mount Lassen in California, Mount St.

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.