QUESTION NO 25. GE140
Volcano is the part of the Earth that erupt magma from the Earth’s chambers. The magma upon reaching the surface transforms into ash, lava and volcanic gases. Over a long period of time with many such eruption a volcano is formed layer by layer until the magma in the chamber beneath is erupted. Also there are different features which formed due to volcanoes like composite volcano, ash and cinder cone, shield volcanoes plug domes, crater and caldera. Shield volcano according to David A. William and Jan Redebaugh(2022), Are formed from effusive eruptions tha produce relatively low-viscosity lava flows forming of dume-like shape by the accumulation of thousands of layers of lava flows. Oregen state University(2003), Explained that shield volcano es are usually constructed almost entirely of basaltic and andesitic lava flows which were very fluid when erupted. They are built by repeated eruption of that occured intermedietly over vast period of time. Also Walker(2000) Exp...