Geological Knowledge--The Origin of Volcanoes

    Volcanoes, like natural deep boreholes, bring materials from deep parts of the earth to the ground, and can also form important minerals. Through the study of volcanic structure and volcanic rocks, we can understand the material composition of the deep part of the earth and the changes in the crust, leading people to understand the earth and reveal the mysteries of the earth. It can be said that volcanoes are a natural window into the earth's interior, so it is of great significance to study volcanoes.

    There is a huge amount of energy inside the earth that melts local rocks to form magma. When magma is squeezed, it will penetrate weak sections of the earth's crust, overflow the ground or erupt out of the ground to form a volcano. The crust of the earth's surface is composed of large and small rock slabs. The edges of the slabs are weak sections. Especially when one plate subducts under another, the magma is squeezed and more likely to cause volcanic eruptions. The Pacific Ocean is mostly on the edge of plates for the surrounding areas and are also concentrated areas of volcanoes. There are also some volcanic formations in the central area of the plate. People often attribute them to hot spots or slow pillars on the earth, just like the earth had pus boils. The Wudalianchi volcanic groups belongs to this kind .