GEOLOGY

Detailed explanation-1: -In volcanology, a lava dome is a circular mound-shaped protrusion resulting from the slow extrusion of viscous lava from a volcano. Dome-building eruptions are common, particularly in convergent plate boundary settings. Around 6% of eruptions on Earth are lava dome forming.

Detailed explanation-2: -Lava domes are formed by viscous magma being erupted effusively onto the surface and then piling up around the vent. Like lava flows, they typically do not have enough gas or pressure to erupt explosively, although they may sometimes be preceded or followed by explosive activity.

Detailed explanation-3: -Lava Domes: ↑ A circular mound that results from the slow eruption of viscous lava that piles up around the vents of some volcanoes. Crystallization: ↑ A process where molten (liquid or semi-liquid) rock hardens into solid rock.

Detailed explanation-4: -The lava that forms the domes can have a very wide range of composition, anywhere from basalt to rhyolite. However, the lavas that most frequently form domes are generally lavas that are higher in Silica (SiO2) and are thus generally more viscous.

Detailed explanation-5: -As viscous lava is not very fluid, it cannot flow away from the vent easily when it is extruded. Instead it piles up on top of the vent forming a large, dome-shaped mass of material.