How volcanoes are formed How volcanoes erupt

The formation of volcanoes is a series of physicochemical processes. The main thing is the large amount of radioactive material present in the interior of the earth.

decays in its natural state, producing a large amount of heat. This heat cannot be dissipated to the ground, and the temperature continues to rise until the rock melts, forming a state of hot melting in the Earth's interior. Once this magma breaks through the earth's crust and erupts out of the ground, volcanoes are formed.

The process before volcanoes erupt from the surface can be summarized into three stages: magma formation and initial ascent phase, magma sac stage, and exit magma sac to the surface.

How are volcanic eruptions formed, and which is more harmful than lava or pyroclastic flows?

Why did Guo Desheng completely crack the cause?

According to the knowledge of geography, lake sediment forms marshland, marshland continues to evolve into land, this is the content of geographical knowledge imparted, if you continue to study deeply, the land formed is in the interior of the lake basin, this land has the same geomorphological structure as the connotation and extension of the basin, then, that is to say, lake sediment can form a basin, this discovery, completely make up for the worldwide gap in the history of earth science, all the mysteries of geology, are because of the "lake sediment can form a basin" This point of view conceals that any research scholar understands this gap, and almost all professional scholars can easily understand the mysteries and other mysteries of geoscience. It's not because I have superhuman intelligence, it's just that I made a chance discovery and discovered a huge "gap" in the field of basic knowledge of earth science, and this discovery completely opened the door to earth science and was unstoppable.

A very simple logical thinking, if I don't discover the mystery of **, there is no way to find that there is a huge gap in the basic knowledge of geoscience.

How are volcanoes formed? Under what circumstances does a volcano erupt?

Formation of volcanic eruptions: The temperature and density of the Earth's interior are uneven. When high-temperature chemicals rise to the shallow surface of the earth, they partially melt because of the decrease in pressure.

Under the action of external forces, these molten chemicals come together to form a magma sac on the shallow surface of the earth. When the working pressure of the magma chamber exceeds the pressure of the geological formation, the magma can break through the shell along the fault block or weak point, causing a volcanic eruption.

Causes of volcanic eruptions: Because of plate interactions, such as downburst zones or collision zones in plates, due to friction, some high temperatures are formed, and the de-drying of some water-containing minerals also reduces the melting point of rock formations, which will also form magma sacs, which in turn lead to mountain activity. At lower pressures, the bases between the molecules are not so close, and in very hot rock formations, the increase in working pressure causes dissolution.

This pressure-relieving melting occurs when a hot rock layer rises from the deepest part of the mantle without cooling to a shallower depth1.

Volcanoes are mainly formed a long time ago, and volcanoes are prone to eruptions when ** occurs.

It is a volcano formed by the evolution of the earth's crust over thousands of years, and it erupts when the earth's crust moves.

I think volcanoes are natural and also formed by weathering, but I feel that volcanoes only erupt under very dangerous circumstances.

<>1. The cause of volcanic eruptions is that the temperature and density of the earth's interior are uneven, forming mantle convection or mantle plumes inside the mantle. There is also a type of volcanism that occurs due to plate interactions, such as in the subduction or collision zones of plates, where local high temperatures are formed due to friction, and the dehydration of some water-bearing minerals also reduces the melting point of rocks.

2. The release of magma and other ejecta from the crater to the surface in a short period of time, due to the large amount of volatiles in the magma, coupled with the confining pressure of the overlying rock layer, the volatiles of these limbs are dissolved in the magma and cannot overflow, when the magma rises close to the surface, the pressure decreases, and the volatiles are released sharply, so that a volcanic eruption is formed.

3. Volcanic eruptions form volcanic ash.