1.Shield volcanoes,like the Sierra Negra volcano in the Galápagos Islands get their gentle hill-like shape because they are built of successive flows of low-viscosity basaltic lava. The low viscosity of the lava means that it can flow for long distances, resulting in the greater size of shield volcanoes compared to composite volcanoes or cinder cones.
2.Composite volcanoes, like Cotopaxi, consist of layers of lava alternating with layers of tephra. The layers (strata) is where the alternative name, stratovolcano comes from. Cotopaxi displays the characteristic shape of composite volcanoes, which have slopes that get steeper near the top of the volcano. The change in the slope reflects the accumulation of tephra fragments near the volcano’s vent. Composite volcanoes typically erupt higher viscosity andesitic and rhyolitic lavas, which do not travel as far from the vent as basaltic lavas do. This results in volcanoes of smaller diameter than shield volcanoes. A notable exception is Mt. Fuji in Japan, which erupts basaltic lava.
3.Cinder cones, like Mt. Capulin, have straight sides and are typically less than 200 m high. Most are made up of fragments of scoria (vesicular rock from basaltic lava) that were expelled from the volcano as gas-rich magma erupted. Because cinder cones are made up almost exclusively of loose fragments, they have very little strength. They can be eroded away easily, and relatively quickly.
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Answers & Comments
TYPES OF VOLCANOES;
1.Shield Volcanoes
2.Composite Volcanoes (Stratovolcanoes)
3.Cinder Cones (Spatter Cones)
1.Shield volcanoes,like the Sierra Negra volcano in the Galápagos Islands get their gentle hill-like shape because they are built of successive flows of low-viscosity basaltic lava. The low viscosity of the lava means that it can flow for long distances, resulting in the greater size of shield volcanoes compared to composite volcanoes or cinder cones.
2.Composite volcanoes, like Cotopaxi, consist of layers of lava alternating with layers of tephra. The layers (strata) is where the alternative name, stratovolcano comes from. Cotopaxi displays the characteristic shape of composite volcanoes, which have slopes that get steeper near the top of the volcano. The change in the slope reflects the accumulation of tephra fragments near the volcano’s vent. Composite volcanoes typically erupt higher viscosity andesitic and rhyolitic lavas, which do not travel as far from the vent as basaltic lavas do. This results in volcanoes of smaller diameter than shield volcanoes. A notable exception is Mt. Fuji in Japan, which erupts basaltic lava.
3.Cinder cones, like Mt. Capulin, have straight sides and are typically less than 200 m high. Most are made up of fragments of scoria (vesicular rock from basaltic lava) that were expelled from the volcano as gas-rich magma erupted. Because cinder cones are made up almost exclusively of loose fragments, they have very little strength. They can be eroded away easily, and relatively quickly.
#BrainlyEveryday
#CarryOnLearning
pabrainliest kung tama >,<