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The two types of igneous rock are are intrusive and extrusive, depending on where they form. Intrusive igneous rock forms underground from slow cooling magma. Extrusive igneous rock forms at or near the surface from quick cooling lava.
Wiki User
∙ 13y ago
Wiki User
∙ 11y agoBasically two ways.
Intrusive igneous rock is formed when magma cools and solidifies beneath the surface of the earth. These rocks are also called plutonic rocks. They are characterized by a coarse grained texture. The slower the magma cools the larger the formed crystals will be, hence the coarse grain. Some magma begins to cool slowly underground and start to form large crystals. Then due to tectonic processes the partially solidified magma is transported to earth's surface where it cools quickly and forms small crystals. This is termed porphyritic texture.
Some intrusive igneous formations are laccolith, batholith, stock, sill, and dike.
Extrusive igneous rocks are formed on the surface of the earth. These rocks are formed as a result of a volcanic eruption. Most have a fine grained texture made of small crystals due to rapid cooling. However, some of the lava cools so quickly that no crystals have time to form. An example of this type of rock is obsidian, commonly called black glass or volcanic glass.
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∙ 12y agoFelsic and Mafic are two very broad classifications for igneous rocks. This is based on their composition. Felsic rocks are rich in silicon and aluminum (e.g. granite) while Mafic rocks have higher concentrations of magnesium and iron (e.g. basalt).
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∙ 11y agoThese r made by magma (after becoming cold . Nutan
The two main types produce igneous rock with different qualities. This is because of the environment in which the magma cools down. It can cool down below the surface in the crust. Or it can cool above the surface such as a lava flow.
Wiki User
∙ 13y agoextrusive and intrusive
OR
plutonic and volcanic
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∙ 13y agoAt or near the surface (extrusive igneous rock) or under the surface (intrusive igneous rock).
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Which would mostly likely occur during the formation of igneous rock?
The basic processes involves in igneous rock formation are; 1. Melting (Magma, formation of molten substance). 2. Volcanicity (Eruption, movement of magma). 3. Cooling (Change in temperature). 4. Crystallization (Mineralization, formation of crystals and minerals). 5. Solidification (Consolidation into a solid mass to form igneous rock).
What 2 things are required to produce metamorphic rock?
Heat and pressure are required to produce metamorphic rock from sedimentary or igneous rock.
What does the term composition mean as it applies to igneous rock?
it can mean two things, (1)mineralogical composition or (2)Chemical composition
What are 3 types of rocks in the rock cycle?
The 3 types of rocks are: 1. Igneous. 2. Sedimentary. 3. Metamorphic. Normally in that order.
What is the change of state when magma crystallizes from igneous rock?
Your question as phrased is unclear. I will proceed to answer both interpretations I have of your question. Note: When magma crystallizes, it forms igneous rocks. 1) What is the change of state when magma forms from igneous rock? - Melting. Rocks are the solid state of matter and magma is the liquid state (although it can be a very viscous liquid). Changing something from solid to liquid is melting. 2) What is the change of state when magma crystallizes to form igneous rocks? - Solidification/Freezing. Magma becomes too cold to continue in a liquid state, it solidifies and crystallizes into solid igneous rocks: freezing.
What are 2 classifications of igneous rock?
Felsic and Mafic are two very broad classifications for igneous rocks. This is based on their composition. Felsic rocks are rich in silicon and aluminum (e.g. granite) while Mafic rocks have higher concentrations of magnesium and iron (e.g. basalt).
What are facts about igneous?
.The oldest rock known today is the Igneous rock. .Igneous rock can be any colour..The word "Igneous" is a Greek word that means fire. Igneous rocks are formed by the cooling of molten rock, lava or magma. When magma solidifies in the earth they are intrusive, when lava cools outside the earth it is extrusive.
What is basic Igneous Rock?
Igneous rocks are formed from the solidification of molten rock material. There are two basic types: 1) intrusive igneous rocks such as diorite, gabbro, granite and pegmatite that solidify below Earth's surface; and 2) extrusive igneous rocks such as andesite, basalt, obsidian, pumice, rhyolite and scoria that solidify on or above Earth's surface. Pictures and brief descriptions of some common igneous rock types are shown on this page.
What are 5 types of igneous rocks?
there are only 2. intrusive igneous rock and extrusive igneous rock
What are the 2 ways igneous rock are is formed?
the 2 ways are intrusive rock and extrusive rock
What 2 igneous are formed by fast cooling lava?
Rock and igneous plants
How do magma turn into extrusive igneous rock?
Lava can turn into igneous rock in 2 ways. When the lava cools to a hardening point inside the volcano it is called intrusive igneous rock. When lava cools outside of the volcano it is called extrusive igneous rock.
Which would mostly likely occur during the formation of igneous rock?
The basic processes involves in igneous rock formation are; 1. Melting (Magma, formation of molten substance). 2. Volcanicity (Eruption, movement of magma). 3. Cooling (Change in temperature). 4. Crystallization (Mineralization, formation of crystals and minerals). 5. Solidification (Consolidation into a solid mass to form igneous rock).
The Three Rock Types and the Rock Cycle?
1. Igneous 2. Sedimentary 3. Metamorphic
Igneous rocks are formed when magma does what?
The Igneous rock formed when magma cools are; 1. Extrusive (Volcanic) Igneous Rock; which are igneous rocks formed when magma cools outside the earths crust. The texture of of extrusive igneous rock is fine grained. 2. Intrusive (Plutonic) Igneous Rock; these are igneous rocks formed by gradual cooling of magma within the earths crust. The texture is coarse grained.
What kind of rock does magma form when it hardens?
If the magma cools on the surface of the crust, it is called extrusive igneous rock, such as pumice, basalt or rhyolite. If the magma cools inside the crust, it is called intrusive igneous rock, such as granite.
What 2 processes can change igneous and metamorphic rock into sediments?
Erosion
