volcano

Article

May 29, 2022

A volcano is a landform formed by the eruption of substances such as magma through the surface of a planet. Planets of the solar system other than Earth, and several volcanoes are also found on these satellites.

Features

It is not connected with other mountains. it's shaped like a hat The peak part is dented. There are traces of volcanic activity

Overview

Volcanoes are commonly seen at plate boundaries. Active volcanic activity occurs where the two plates diverge, exemplified by the mid-ocean ridge of the seafloor and Iceland along its extension. Examples of continental crust include the East African Rift, the Rio Grande Rift, and the Eifel Volcano. Volcanic activity occurs frequently even where plates converge, and the archipelago of the western Pacific from the Kuril Islands to New Zealand via the Japanese and Mariana Islands is a typical example. Volcanic activity is rare at the boundary of the transformation fault. Volcanic activity at divergent boundaries produces less destructive and less viscous magma, whereas volcanic activity at convergent boundaries is explosive and the erupting magma is highly viscous. This is because the mechanism by which the source magma is formed is different. Another cause of volcanic formation is plume phenomenon, and the resulting volcanoes are called hot spots, and Hawaii is a representative example. Hot spots can also be seen on many other planets in the solar system. In the Republic of Korea, Hallasan in Jeju Island and Seonginbong in Ulleungdo are volcanoes, Baekdusan in the border between the Democratic People's Republic of Korea and China, and Chugyeongsan in the border between the Democratic People's Republic of Korea and the Republic of Korea are volcanoes. The ancient Greeks and Romans considered the fickle power of volcanoes to be divine harmony. German astronomer Johannes Kepler, who lived in the 16th and 17th centuries, believed that volcanoes were the fountains of the earth's tears.

Impact

Lava, volcanic gas, volcanic ash, and advection from volcanic eruptions have a tremendous impact on the surrounding environment. Due to the volcanic ash, a huge traffic disturbance occurs, and the surrounding organisms die (air pollution, soil acidification, water pollution).

Impact on plants and animals

When a volcano erupts, all living things in the area disappear (if you're lucky, you can live), so in the end, only hot and intense volcanic ash remains. However, animals that can tolerate relatively high temperatures live in the warm water around the volcano. The Great Explosion of Krakauta Island in Sunda Strait in East India in 1883 provided good data to know what kind of creatures re-invaded after the eruption. The eruption on the island was the most massive, and all life on the island was wiped out and the island was covered with lava and volcanic ash. It was a spider that first came to the island after the explosion, and it was discovered that it was spinning a web at 9 months. In 1886, light flowering plants with microspores and seeds of cyanobacteria, bryophytes and ferns were discovered. All of these were blown by the wind or attached to a surface to reach the island. Birds and insects were the first to cross over caustic, and the others settled after the appearance of the food for their animals on the island. Birds kept fruits such as figs in their bodies and flew with seeds and small animals attached to their wings and feet. It seems that pythons, king lizards, sea lizards, etc. swam, and other animals moved to the island on flakes. Thus, the island became the same jungle as before the eruption in 1930, and there were more than 1,200 species of animals.

Kind

shield volcano old