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The reason of much volcanic slag in Kenya.

Kenya is rich in volcanic slag because the word volcanic slag is used by geologists to describe igneous rocks with many bubbles or voids.

Volcanic slag is common on volcanic vertebrae. Usually volcanic slag will form a mountain, and the top of the mountain is the crater. For example, Mount Wellington in Auckland, New Zealand.

Another kind of volcanic slag is produced when the mud volcano burns and erupts, and the heated mud will form a volcanic slag cone.

Volcanic slag with very large porosity is called reticulated volcanic slag.

Volcanic slag is rich in magnesium and iron, but less in silicon, usually black, dark gray, red and brown. Volcanic slag is very hard. Because it is hard and porous, it is an excellent material for paving roads.

cause

The reasons for the formation of volcanic slag are as follows: when magma containing a lot of air is ejected, because the magma encounters a relatively low pressure environment, the air dissolved by the magma will leave the magma, produce bubbles, and be intercepted by the cooled solid magma to become porous volcanic slag.

The process of volcanic slag production is somewhat similar to the process of foaming when opening beer bottles. When the beer bottle is opened, the pressure in the bottle suddenly drops, so that the dissolved carbon dioxide gas in the beer quickly escapes and forms foam. When a volcano erupts, the dissolved volcanic gas in the magma in the volcanic channel quickly escapes, forming a large number of bubbles, and after cooling, forming volcanic slag.