Igneous Rocks and Their Types (Full Discussion)
Igneous Rocks and Their Types (Full Discussion) – Igneous rocks are formed from hot magma that turns solid as a result of general cooling. This type of rock has homogeneous and compact characteristics, no layering and does not contain fossils. This type of rock is divided into two groups based on where it is frozen and based on the constituent minerals.
Igneous Rocks and Their Types (Full Discussion)
Based on the place of freezing is divided into three types, viz deep frozen, frozen scrapsAnd frozen outside.
Deep Igneous Rocks
This one deep rock or plutonic rock is found below the earth's surface, which is found in depth of 15-50 km, this rock is crystalline only, because the freezing is close to the layers asthenosphere.
Magma cools very slowly, resulting in large, coarse crystals. For example granite containing quartz and gabbro in which there are dark minerals.
Korok Igneous Rocks
Corok type rock or breakthrough rock that is formed from fissures or areas of the earth's crust, before magma reaches the earth's surface. The freezing process takes place quickly as a result of which there are types of rocks that have large or small crystals or even no crystals like amorphous materials, in the magma there is a granite arrangement and it freezes in the aisles, so that these rocks are formed which are called prophyry granite.
Wild Igneous Rock
This type of rock is often called molten rock, this rock occurs due to the freezing process that occurs on the surface of the earth. The freezing process of magma that comes out of the earth's surface cools and freezes, with the form of rock that is smooth and not crystalline.
For example obsidian or glass stones which are black, gray, brown and yellow and pumice rocks which contain gas cavities.
Based on the arrangement of minerals, this type is divided into two types, namely frozen light minerals and frozen heavy minerals.
Light Minerals
For this type of rock, it is light, composed of light minerals that contain lots of silicates and is light in color, because of this, these rocks are acidic.
Heavy Minerals
In this type of rock heavy minerals are composed of not much heavy mineral content contains silicate, not easily broken, usually dark in color, therefore this type of rock alkaline.
That's a little about Igneous Rocks and Their Types (Full Discussion), see also other stones in the next article, I hope this is useful for all readers. Thank You.
source by: Geography of SMA class X Aspiration
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