Shield volcanoes are formed by lava flows of low viscosity – lava that flows easily. Consequently, a volcanic mountain having a broad profile is built up over time by flow after flow of relatively fluid basaltic lava issuing from vents or fissures on the surface of the volcano.Click to see full answer. Considering this, what are the 3 main causes of volcanic eruptions?Although there are several factors triggering a volcanic eruption, three predominate: the buoyancy of the magma, the pressure from the exsolved gases in the magma and the injection of a new batch of magma into an already filled magma chamber.Subsequently, question is, what are the contributing factors that affect the formation of the following volcanic shapes? These include: The volume of volcanic products. The interval length between eruptions. The composition of volcanic products. The variety of volcanic eruption types. The geometry of the vent. The environment into which the volcanic products are erupted. Correspondingly, what factors affect volcanic eruptions? The style of eruption depends on a number of factors, including the magma chemistry and content, temperature, viscosity (how runny the magma is), volume and how much water and gas is in it, the presence of groundwater, and the plumbing of the volcano.How does a volcano erupt for kids?Volcanic eruptions happen when gas bubbles inside magma, or hot liquid rock, expand and cause pressure to build up. This pressure pushes on weak spots in the earth’s surface, or crust, causing magma to exit the volcano.
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