Bazaltik Pomza

       BASALTIC PUMICE

       Volcanic tuff is a type of volcanic rock that contains a large number of pores. Volcanic tuff is formed during its eruption to the earth when it is very rich in gases dissolved in magma, magma coming to the surface comes under low pressure and dissolved gases cause bubbles to form inside the magma, some of these bubbles become trapped inside and turn into pores when the magma cools down and begins to solidify.

       These pores are mostly small, spheroid-shaped, opening to each other with small shape changes rather than affecting each other.

       Magma is a melt located inside the earth, which contains silicates and CO2 and dissolved gases in terms of its structure. While the melt that is inside the earth and rises from the mouths of volcanoes is called magma, it gets the name lava when it comes to the earth with the eruption of volcanoes.

       Magma, whose source is located tens of miles below the earth, contains some crystals, dissolved gases, but magma is mainly a melt consisting of oxygen, silicon, aluminum, iron, magnesium, calcium, sodium, potassium, titanium and manganese. The magma also contains trace amounts of other chemicals. From the cooling stage, it precipitates crystals and various minerals in liquid magma until a volcanic or igneous rock is formed during the solidification stage.

       Volcanic tuff is mostly dark in color (black, red or brown) and its composition is basaltic or andesic. Volcanic tuff is relatively lighter due to the large number of macroscopic, elliptical-shaped pores it has, but unlike pumice, the specific gravity of all volcanic tuff rocks is greater than 1 and they emit b in water.

       Holes or pores found in volcanic tuff occur when gases dissolved in magma are released during an eruption, forming bubbles in the magma, and some of these bubbles freeze while the rock cools and solidifies. Volcanic tuff occurs as part of a lava flow, often on the side of the surface part, or as a clastic volcanic eruption. The word volcanic tuff comes from the Greek and its old name is cinder (slag) kind.

       CHEMICAL PROPERTIES OF BASALTIC PUMICE