Compare-Contrast-Connect: Volcanoes

Not all the volcanoes are the same. Volcano comes from various geological processes. For example, the volcano in Figure 8 seems to be similar in shape, but it has very different characteristics. Mountains of St Helens and Mt. Fuji (SF Figures 8A and C) are in the subduction zone. Because the generated lava is a complex mixture of continental crust and oceanic crust, they are called complex volcanoes. Complex volcano rarely erupts, but when they occur they explode explosively

Mauna Kea (SF Figure 8B) is a hot spot and the hot magma source is a very shallow point on the surface of the Earth. The Hawaiian islands are located in the middle of the Pacific plate and are formed as the plate moves over this hotspot. Mauna care is a dormant volcano. Kilauea is another volcano on Hawaii Island and is currently active. It is one of the most lasting volcanic eruptions and usually produces a slow, gentle lava flow. There are many volcanoes in Iceland (eg SF Figure 8D). It is a very unusual volcanic continent as it is formed where the center lift valley of the sea actually rises above the surface of the water. Eyjafjallajökull and Mt. Saint Helens are complex volcanoes, usually causing steep and explosive volcanic eruptions. In Figure 8 of SF, you can see the explosion of Eyjafjallajökull (SF in Figure 8D) and the result of explosive explosion of the volcano. St Helens (SF Figure 8A)

Find the volcano in Figure 8 on the map. What kind of plate boundary or plate these volcanoes are?

Why do you think there are different types of volcanic eruptions on hot volcanoes and subduction zone volcanoes? Please explain your answer from a plate movement perspective. (Hint: Please check the composition of magma and lava.

Let's study what the volcanic eruption in Iceland is like. Compare those volcanic eruptions with subduction zones or hot volcanic eruptions. How are they similar? Wrong?

Figure 8 Which volcanoes are erupting now? When do scientists predict that these volcanic eruptions will cease?

Which volcano in Figure 8 is active but has not erupted yet? When do scientists think they will break out again?

Indeed, you can compare different types of volcanoes with soccer team players. The tall and impressive compound conical volcano is like a quite powerful and confident quarterback. A wide and low shield shaped volcano seems to be a strong ruler of the team. Besides, although it is growing rapidly, the smaller Thinder Coehn volcano seems to be a compact runway with our team moving quickly. Let's take a closer look at these three main types of volcanoes. A complex conical volcano, also called "layered volcano" or simply "compound volcano", is a conical volcano composed of layers of lava, ash, and rock fragments. Complex conical volcano is a wonderful place to grow to a height of over 8000 feet. St. Helens Mountain and Rainier Mountain discovered in Washington State are impressive examples of multiple volcanoes.

One of the most common types of volcanoes is the burning cone. Due to the low risk compared to other types, the Thinder cone grows only to about 1,000 to 1,200 ft. Unlike other types of volcanoes, that is, unlike shield volcano and compound volcano, thinner cone is usually formed with one opening. The opening of the cone cone is a conical structure and the steep slope is formed by debrisynder discharged near the chimney / vent. Another type of volcano is shield volcano. Unlike the Thinder cone, the size of the shield volcano is very large. However, it is not as big as it looks. This is because the eruption of shield volcanic lava is not accompanied by pyroclasts (emission of gas and particles).