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Both are formed from the crystallization of minerals caused by the cooling of magma.
Intrusive igneous rocks cooled below the surface of the planet, however, and generally display larger crystals due to the increased amount of time spent at mineral crystallization temperatures from the insulating effect of surrounding material.
Examples: granite, gabbro, diorite, peridotite.
Extrusive rocks are formed from magma at or above the surface of the planet, and generally display smaller mineral crystals, or no crystals at all, because of the rapid cooling environment in which they form. Chemically, an intrusive and extrusive rock could be identical, the only difference being the size of the mineral crystals they contain.
Examples: obsidian, rhyolite, pumice, scoria, basalt.
Both are formed from the crystallization of minerals caused by the cooling of magma.
Intrusive igneous rocks cooled below the surface of the planet, however, and generally display larger crystals due to the increased amount of time spent at mineral crystallization temperatures from the insulating effect of surrounding material.
Examples: granite, gabbro, diorite, peridotite.
Extrusive rocks are formed from magma at or above the surface of the planet, and generally display smaller mineral crystals, or no crystals at all, because of the rapid cooling environment in which they form. Chemically, an intrusive and extrusive rock could be identical, the only difference being the size of the mineral crystals they contain.
Examples: obsidian, rhyolite, pumice, scoria, basalt.
Both are formed from the crystallization of minerals caused by the cooling of magma.
Intrusive igneous rocks cooled below the surface of the planet, however, and generally display larger crystals due to the increased amount of time spent at mineral crystallization temperatures from the insulating effect of surrounding material.
Extrusive rocks are formed from magma at or above the surface of the planet, and generally display smaller mineral crystals, or no crystals at all, because of the rapid cooling environment in which they form. Chemically, an intrusive and extrusive rock could be identical, the only difference being the size of the mineral crystals they contain.
Both are formed from the crystallization of minerals caused by the cooling of magma.
Intrusive igneous rocks cooled below the surface of the planet, however, and generally display larger crystals due to the increased amount of time spent at mineral crystallization temperatures from the insulating effect of surrounding material.
Examples: granite, gabbro, diorite, peridotite.
Extrusive rocks are formed from magma at or above the surface of the planet, and generally display smaller mineral crystals, or no crystals at all, because of the rapid cooling environment in which they form. Chemically, an intrusive and extrusive rock could be identical, the only difference being the size of the mineral crystals they contain.
Examples: obsidian, rhyolite, pumice, scoria, basalt.
Intrusion igneous rocks form underground from magma that solidifies slowly, resulting in coarse-grained rocks like granite. Extrusion igneous rocks form on the Earth's surface from lava that cools quickly, creating fine-grained rocks like basalt.
Both are formed from the crystallization of minerals caused by the cooling of magma.
Intrusive igneous rocks cooled below the surface of the planet, however, and generally display larger crystals due to the increased amount of time spent at mineral crystallization temperatures from the insulating effect of surrounding material.
Extrusive rocks are formed from magma at or above the surface of the planet, and generally display smaller mineral crystals, or no crystals at all, because of the rapid cooling environment in which they form. Chemically, an intrusive and extrusive rock could be identical, the only difference being the size of the mineral crystals they contain.
Intrusive rocks cool below the earth's surface and take much longer to crystalize, thus are usually coarse grained. Intrusive rocks often form through magma plumes, which rise through the mantle and cool in the earth's crust. Granite is a good example of an intrusive igneous rock.
Extrusive rocks cool above the earth's surface and crystallize very quickly, as a result are finer grained. Extrusive rocks are released from the earth in the form of volcanic eruptions, which occur both on the continents and on the ocean floor. Extrusive rocks like basalt form the ocean floor, exiting the asthenosphere from divergent plate boundaries.
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Magma that forces its way into rocks and hardens is called a extrusion or fault or unconformity or intrusion?
Magma that forces its way into rocks and hardens is called an intrusion. This process forms igneous intrusions such as dikes, sills, and batholiths as the molten rock solidifies underground.
When there is an igneous intrusion and a fault line which one is younger?
That depends! If the fault line cross cuts the igneous intrusion causing the intrusion to be displaced on either side of the fault and forming a broken mass of rock within the intrusion known as a fault breccia then the fault is younger than the intrusions, as the intrusion must have already existed for the fault to cause it's displacement. If on the other hand the igneous intrusion cross cuts the fault and is un-deformed then it is probable that it is younger than the fault.
An igneous intrusion that cuts across rock layers is called a?
A discordant intrusion is known as a dyke. A larger intrusion may also be a pluton or batholith, which both also cut across rock strata. A sill is an intrusion which is concordant, and goes between the strata. This does not necessarily mean that it is horizontal.
How does igneous intrusion end up as a hill?
An igneous intrusion may end up forming a hill when erosion wears away the surrounding rock layers, exposing the more resistant igneous rock underneath. Over time, this erosion can create a hill or even a mountain if the igneous intrusion is large enough and resistant to weathering.
What statement best describes an igneous intrusion?
An igneous intrusion is formed when molten rock (magma) is forced into preexisting rock and solidifies underground. Over time, the surrounding rock erodes away, exposing the igneous intrusion at the Earth's surface. Intrusions can take various shapes and sizes, such as dikes, sills, and laccoliths.
How does the age of an igneous extrusion compare with the rock into which it was extruded?
An igneous intrusion is younger than the rock into which it intruded.
How does the age of a rock layer compare with an igneous intrusion that is through it or an igneous rock extrusion above it?
If it is above it, the rock layer came after the intrusion. if the intrusion went through the rock layer is older because they layer had to be there in order for the intrusion to go through.
When magma rises what geological formation can result?
If it has broken through the Earth's crust then it would be a igneous extrusion and a volcano can form. If it hasn't complete broke through the crust it would be a igneous intrusion. Depending if the intrusion was concordant or discordant with the bedding planes it would be either a sill or a dyke.
What is an igneous intrusion between two sedimentary rock layers?
A laccolith is an igneous formation between two sedimentary layers
Magma that forces its way into rocks and hardens is called a extrusion or fault or unconformity or intrusion?
Magma that forces its way into rocks and hardens is called an intrusion. This process forms igneous intrusions such as dikes, sills, and batholiths as the molten rock solidifies underground.
What type of area granite and basalt rocks found in?
Principally and respectively they are the main continental and oceanic crust rocks of the Earth. They will also appear on the surface as igneous rocks by intrusion or extrusion (volcanism).
What is a body of extrusive igneous rock called?
The answer to this ? is extrusion
What do you call the layering in igneous rocks?
"layering" As in "layered" igneous intrusion.
What tells geologists how extrusion forms?
I am learning about this in my Science class, and when a geologist looks at an extrusion, they know it's an extrusion because it is Igneous rock, and an extrusion helps tell the reletive ages of the layers around it.
What is a large igneous intrusion called?
A large igneous intrusion is called a pluton. Plutons are formed when molten rock (magma) solidifies beneath the Earth's surface, resulting in large bodies of igneous rock. Examples of plutons include batholiths, stocks, and laccoliths.
When there is an igneous intrusion and a fault line which one is younger?
That depends! If the fault line cross cuts the igneous intrusion causing the intrusion to be displaced on either side of the fault and forming a broken mass of rock within the intrusion known as a fault breccia then the fault is younger than the intrusions, as the intrusion must have already existed for the fault to cause it's displacement. If on the other hand the igneous intrusion cross cuts the fault and is un-deformed then it is probable that it is younger than the fault.
What kind of a rock is an intrusion made of?
igneous rock
