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Intrusive, or forming under the surface.

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How are intrusive classified?

Intrusive features are typically classified as plutonic rocks, especially inside of a volcano. Comparatively, extrusive features are also classified as volcanic rocks.


What Has two kinds of instrusive and extrusive?

Volcanic rocks have two types: intrusive rocks and extrusive rocks. Intrusive rocks, also known as plutonic rocks, form when molten magma cools and solidifies underground. Extrusive rocks, also called volcanic rocks, form when molten lava erupts onto the Earth's surface and cools quickly.


Intrusive rock is also called platonic rock?

Actually, it is called intrusive rock and not platonic rock. Intrusive rock forms from magma that solidifies beneath the Earth's surface, while extrusive rock forms from lava that solidifies on the Earth's surface.


What is the difference between exclusive and intrusive rocks?

There is no such thing as an "exclusive" rock. However, there are extrusive rocks. These are divisions of igneous rocks, or rocks that form from molten rock. Intrusive rocks form from molten rock that has cooled underground. They can also be called plutonic rocks. Extrusive rocks, also called volcanic rocks, form from molten rock that has formed at or above the surface.


Is mica extrusive or plutonic?

Mica is a mineral that can be found in both extrusive and plutonic igneous rocks. It is commonly associated with granite, a plutonic rock, where it forms as a result of slow cooling of magma. However, it can also occur in volcanic rocks, which are extrusive, where it crystallizes from lava that cools quickly. Thus, mica itself is not categorized as exclusively extrusive or plutonic; rather, it can be present in both types of igneous rocks.


Is apatite intrusive or extrusive?

Apatite is typically found as an accessory mineral in both intrusive and extrusive igneous rocks. It is more common in intrusive rocks like granite, but can also be found in extrusive rocks like basalt.


Is intrusive rock is also called platonic rock?

No, intrusive rock is not also called platonic rock. Plutonic rock is another name for this type of rock, which is produced by magma.


Would you list intrusive rocks under rocks that form above the ground or below?

Intrusive rocks are Igneous rocks that have been formed underground. Igneous rocks are formed by the cooling of lava/magma. Igneous rocks are divided into two categories- intrusive and extrusive. Intrusive is when the magma cools slowly beneath the Earth's surface, which causes large crystals to form. When lava cools above the Earth's surface, it is called extrusive. Extrusive rocks have smaller crystals compared to intrusive, the difference always being noticable.


What is igneous rock?

Igneous rock is one of the three main rock types based on the method of its formation. It is also referred to as plutonic or volcanic rock depending on where it formed. In a nutshell, to be classified as igneous, a rock must have crystallized and solidified from molten rock (magma) either below ground (intrusive igneous rock) or at or near the surface (extrusive igneous rock).


What is hypabyssal?

A hypabyssal igneous rock is formed in between the depth of intrusive (also called plutonic) rocks and extrusive (volcanic) rocks. They are formed when magma or lava cools down and solidifies.


3 main groups of igneous rocks?

The three main groups of igneous rocks are intrusive (plutonic), extrusive (volcanic), and hypabyssal rocks. Intrusive rocks form below the Earth's surface from the slow cooling of magma. Extrusive rocks form on the Earth's surface from rapidly cooling lava. Hypabyssal rocks are intermediate rocks that form from magma that solidifies in the crust.


True or false intrusive igneous rock forms small crystals because it cools rapidly?

True. Intrusive igneous rock, also known as plutonic rock, forms larger crystals because it cools slowly underground. Extrusive igneous rocks cool rapidly on the Earth's surface, forming smaller crystals.