GEOLOGY

Detailed explanation-1: -The lava which gets saturated in valleys after numerous eruptions forms an elevated region which is known as lava plateau. The lava that results in the formation of the lava plateau is of low viscosity and also have gases trapped in it. The plateau thus formed can be of a single volcano or of multiple volcanoes.

Detailed explanation-2: -(i) Lava plateaus are formed by numerous successive eruptions of lava through vents and crack on the Earth’s surface. (ii) The lava that flows out then cools down and leads to the formation of an elevated piece of land. Eg: Deccan plateau in India.

Detailed explanation-3: -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-4: -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.