GEOLOGY

Detailed explanation-1: -Where a volcano produces low viscosity, runny lava, it spreads far from the source and forms a volcano with gentle slopes: a shield volcano.

Detailed explanation-2: -Effusive eruptions build up gently-sloping Shield Volcanoes like Hawaii.

Detailed explanation-3: -Shield Volcano: A shield volcano has low levels of dissolved gas and silica in its magma. Its eruptions are effusive, and the fluid lava moves quickly away from the vent, forming a gently sloping volcano. Mauna Loa in Hawaii is an example.

Detailed explanation-4: -Basalt magma often forms shield volcanoes. Andesite magma often forms cone volcanoes.

Detailed explanation-5: -A shield volcano is a broad volcano with shallow inclining sides. Shield volcanoes are formed from many magma flows of low viscosity. The magma flows out of the vent and slides down the slopes of the volcano and builds up the size.