Hallasan is the name of this volcano. It is the central volcanic peak of Jeju Island.
Hallasan is the largest volcano found on a single mountain peak. It's a Shield volcano which the eruptions basal and trachyte lava built the island above sea level. It's famous for the ecological diversity. Unlike most volcanos which are formed from Earth’s crust or the boundaries between tectonic plates, Jeju Island's volcanic eruption took place beneath the middle of the tectonic plate creating this large volcano. Hiking on this volcano allows you to see a beautiful view of Jeju Island as well.
The crater is in the center of the volcano, it's name is known as Baekbokdam.
As you can see in the picture, the crater was formed from an eruption of the volcano millions of years ago. The volcano is a circular depression in the ground caused by the volcanic activity. It was formed from magma when it had erupted as gases and lava occured. The crater was also formed from the erupted volcanic deposits such as lava flows and tephra.The lava flow that errupted from this volcano made the structure and had left small pieces of rocks around the crater which was created in the center, making a nice senery for travelers to hike on and explore what's on the Hallasan volcano. There are many interesting things that can be found on the volcano and has many evidences of how it was formed.
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