Assignment task:
How would you reply? A volcano is a crack in the earth's crust that allows lava, volcanic ash, and gases to escape. Volcanic eruptions are partially driven by dissolved gas pressure, similar to how escaping gases pull the cork out of a bottle of champagne. Under a volcano is a crack in the earth's crust that allows lava, volcanic ash, and gases to escape. Volcanic eruptions are partially driven by dissolved gas pressure, similar to how escaping gases pull the cork out of a bottle of champagne. Under a volcano
Although there are many diverse volcanic characteristics that might arise from erupted magma, there are two basic categories of volcanoes: stratovolcanoes and shield volcanoes. Why are there several types of volcanoes? In volcanology, viscosity is essential. An eruption of very viscous (very sticky) magma produces steep-sided volcanoes with 30-35° slopes. Because the viscous volcanic material does not flow far from where it erupts, it accumulates in layers, producing a cone-shaped volcano known as a stratovolcano. On the other hand, shield volcanoes have less than 10° slopes and spew more fluid lavas known as basalt. When a shield volcano erupts, basalt can flow for long distances away from the vent, resulting in broad, gentle slopes. In volcanology, viscosity is essential. An eruption of very viscous (very sticky) magma produces steep-sided volcanoes with 30-35° slopes. Because the viscous volcanic material does not flow far from where it has erupted, it accumulates in layers, producing a cone-shaped volcano known as a stratovolcano. On the other hand, shield volcanoes have less than 10° slopes and spew more fluid lavas known as basalt. When a shield volcano erupts, basalt can flow for long distances away from the vent, resulting in broad, gentle slopes.
Stratovolcanoes have steeper sides and a more cone-like form than shield volcanoes. They are generated by viscous, sticky lava that is difficult to flow. As a result, lava accumulates around the vent, producing a volcano with steep slopes. Because of the gas buildup in the viscous magma, stratovolcanoes are more likely to generate explosive eruptions. Stratovolcanoes have steeper sides and a more cone-like form than shield volcanoes. They are generated by viscous, sticky lava that is difficult to flow. As a result, lava accumulates around the vent, producing a volcano with steep slopes. Because of the gas buildup in the viscous magma, stratovolcanoes are more likely to generate explosive eruptions.
Shield volcanoes When a volcano spews low-viscosity, flowing lava, it spreads far from the source, forming a shield volcano with soft slopes. The majority of shield volcanoes are created by fluid basaltic lava flows. The shield volcanoes Mauna Kea and Mauna Loa. They are the world's biggest active volcanoes, towering nearly 9 kilometers above sea level surrounding Hawai'i. When a volcano spews low-viscosity, flowing lava, it spreads far from the source, forming a shield volcano with soft slopes. The majority of shield volcanoes are created by fluid basaltic lava flows. The shield volcanoes Mauna Kea and Mauna Loa. They are the world's biggest active volcanoes, towering nearly 9 kilometers above sea level surrounding Hawai'i.