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What below the Earths's surface cools and hardens to form mineral crystals?
Wiki User
∙ 9y ago
Molten magma cools and hardens to form mineral crystals.
Wiki User
∙ 9y ago
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Do igneous rocks that form inside the Earth's crust look different from the igneous rocks that form on the Earth's surface?
Yes. Igneous rock that forms on the surface will have small mineral crystals, or in some cases no mineral crystals. Igneous rock that forms below the surface will have larger mineral crystals, from the additional cooling time afforded by the insulating effects of the surrounding Earth material.
What Igneous rocks have large crystals and form when melted rock cools slowly and hardens underneath earth's surface?
They are called intrusive igneous rocks.
How are intrusive and extrusive rock form?
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.
Where does lava go when it erupts?
When lava reaches the surface, it quickly hardens into rock. The resulting rock will have either a glassy texture (with no crystals) or have a fine-grained texture (with small crystals) because the minerals have little or no time to crystallize.
Magma that hardens vertically underneath the surface will form a sill?
No. A sill forms when magma hardens parallel to the rock layers, which is usually horizontal. When magam hardens vertically, it forms a dike.
When melted rock cools or hardens in or under earth surface it forms to what?
it forms to a mineral
A mineral specimen has very small crystals What is the best explination for how this happened?
The mineral cooled rapidly on earth's surface
Do igneous rocks that form inside the Earth's crust look different from the igneous rocks that form on the Earth's surface?
Yes. Igneous rock that forms on the surface will have small mineral crystals, or in some cases no mineral crystals. Igneous rock that forms below the surface will have larger mineral crystals, from the additional cooling time afforded by the insulating effects of the surrounding Earth material.
What Igneous rocks have large crystals and form when melted rock cools slowly and hardens underneath earth's surface?
They are called intrusive igneous rocks.
A mineral specimen has very small crystals what is the best explanation for how this happened?
It is likely that the mineral formed from molten lava on the Earth's surface. This is because it would have cooled very rapidly, so forming the small crystals.
What factor determine the size of crystals in metamorphic rocks?
Large mineral crystals that are all about the same size are formed from magma that cooled slowly inside the earth. Small mineral crystals (not identifiable without a microscope) formed from magma that cooled rapidly, on or near the surface of the earth.
What are rocks called that are formed by magma which has cooled below the surface of the earth?
They are called intrusive igneous rocks, characterized by their visible mineral crystals.
What is the difference between intrusive extrusive igneous rocks?
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.
How are intrusive and extrusive rock form?
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.
What are two main ways that mineral form?
when water evaporates, as in a dry climate, ions that are left behind can come together to form crystals like the halite crystals. Or if too much of a substance is dissolved in water, ions can come together and crystals of that substance can begin to for in the solution.
How are crystals formed and how does the rate effect the crystal?
Crystals that are formed below the surface are formed by the cooling of magma. Crystals above the surface are formed when a volcano erupts, and cools, again, above the surface. Crystals that are below the surface usually have a slower rate of cooling than those above the surface, causing bigger crystals because of the slower cooling:)
What is the difference between intrusion and extrusion igneous rocks?
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.
