ROCKS AND THEIR CLASSIFICATION-IGNEOUS ROCKS

“Igneous rock” is widely known as one of the three pivotal types of rock. The other rock is also known as sedimentary and metamorphic. “Igneous rock” is shaped by the cooling as well as solidification of magma or lava. The study has described the classification of “igneous rocks.” In the context of the study, there are types of “igneous rock”. The rocks and their classification have also been depicted in this study. Igneous rock in general forms while the rock which is in molten motion cools and crystallises.  

Types of igneous rock 

There are many types of “igneous rock”. These rocks are andesite rock, basalt, pumice, scoria, obsidian, dacite rhyolite and tuff. 

Dacite is widely known as a fine-grained, igneous rock which  is extrusive  as usual, light in color. It has an amalgamation which  is connected  between rhyolite and andesite. 

Basalt is also an important “igneous rock”. It is also fine-grained, a very extrusive “igneous rock” that is dark in the colour. It is usually  composed  basically with plagioclase as well as pyroxene. The sample is found two inches across. 

Obsidian is also another crucial “igneous rock” which is completely dark in colour and the volcanic glass which is shaped or evoked from the very swift cooling of molten rock material. It radically cools very quickly which crystals do not form. The sample of this “igneous rock” in general found above is about five centimetres across. 

Rhyolite is also a crucial “igneous rock”. It is very light in colour and fine-grained and extrusive igneous rock which is composed of quartz and minerals associated with feldspar. 

Pumice is also widely known as a vesicular “igneous rock.” It is very light in colour. It radically is shaped through the very swift solidification of the melt. The texture associated with vesicles is widely known as a result of gas trapped associated with medley at the specific time of solidification. 

Scoria is generally dark in colour. It is also an important “igneous rock” that is vesicular as well as extrusive.  The vesicles are radically an outcome of the gas which is trapped within the melted lava and the prope crystallisation of the lava. It is almost  shaped like  a frothy crust which is situated on the top of the lava. 

The creation of the igneous rock 

“Igneous rock” radically forms while hot as well as the molten rock becomes cool and crystalizes. The melt occurs deep within the earth in front of the boundaries associated with an active plate or the hot spot. After that, it arises from the surface.

The characteristic of igneous rock 

There are many features of the “igneous rock”. The “igneous rock” is in general not associated with any kind of fossil. Most of the “igneous rocks” forms insert more than one mineral deposit. The “igneous rock” in general may be plain or coarse. As usual, the “igneous rock” does not react with acid. The igneous rock has various sizes and shapes. 

Conclusion 

After the proper analysis of the above study, it can be said that the “igneous rock” is shaped by the solidification of the lava as well as the magma. The classification of the “igneous rock” is very important and these various types reveal the variety of the “igneous rock”. Granite, basalt, scoria, pumice, rhyolite and many other igneous rocks are found on the earth.  The features or the characteristics of the “igneous rock” are very important. These features are very helpful for the identification of the “igneous rock”. The “igneous rock” has different shapes and sizes.