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Igneous rocks have different textures for two reasons.
The first reason is that the magma from which the igneous rocks were made can be acid (having a lot of silica in it like Granite) or basaltic (having less silica and a lot more dark minerals). The acidity of a magma has a great affect on the viscosity of the lava and this affects the texture of the rocks formed.
The second (and more important) reason relates to the speed with which the magma cools. If the magma cools quickly the crystals are small and the rocks are fine textured. If the magma cools slowly the rocks end up with big, course grained crystals.
Wiki User
∙ 14y ago
Wiki User
∙ 13y agoIgneous rocks have different textures for two reasons.
The first reason is that the magma from which the igneous rocks were made can be acid (having a lot of silica in it like Granite) or basaltic (having less silica and a lot more dark minerals). The acidity of a magma has a great affect on the viscosity of the lava and this affects the texture of the rocks formed.
The second (and more important) reason relates to the speed with which the magma cools. If the magma cools quickly the crystals are small and the rocks are fine textured. If the magma cools slowly the rocks end up with big, course grained crystals.
Wiki User
∙ 14y agoBecause it experienced two different rates of cooling. Typically the rock was cooling slowly and began to cool more rapidly due to various conditions. Porphyries are typical examples of igneous rock with two distinct crystal sizes and textures.
Wiki User
∙ 13y agoNo. Take for instance granite and rhyolite, both which are igneous rocks that can have roughly the same compositions. Rhyolite is fine-grained because of rapid cooling from melt, and granite is coarse-grained from slow cooling from melt.
Wiki User
∙ 15y agoyes depending on the rate of cooling. If it was cooled slowly you generally form larger crystals (granite) and if cooled fast you form small crystals (rhyolite)
Wiki User
∙ 11y agoigneous rocks made from hard and cool rocks
Wiki User
∙ 14y agoIt depends on how it was formed.
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∙ 14y agoyes
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∙ 12y agoyes
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What is the texture of Intrusive igneous rocks?
An igneous rock has two different textures. Extrusive rocks generally are smooth and glassy. Intrusive rocks are generally coarse
What sample is igneous and has a coarse texture?
Granite
Was igneous rocks were classified by their their origin texture and shape?
No, igneous rocks are not classified by their shape. They are primarily classified based on their origin (either intrusive or extrusive) and their texture (coarse-grained, fine-grained, glassy, etc.). Shape or form is not a major factor in the classification of igneous rocks.
How do igneous rocks form and how are they classified?
Igneous rocks are formed by the cooling of lava (above Earth's surface) or magma (below). Rocks in general are classified by their mineral composition, texture, and origin. Igneous rocks all have the origin of molten material, there are two categories within this: intrusive and extrusive. Intrusive rocks formed below earth's surface and extrusive rocks above. Their mineral composition varies greatly and depends on each individual rock. The classification of igneous rocks in texture is linked to their origin. The texture of a rock is defined by its grain: can you see and feel the little rocks that make it up? If you can, that rock has a coarse grain, if you can't see the bits, it is fine grained. Intrusive igneous rocks are usually fine grained; extrusive, coarse grained.
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.
Intrusive Igneous rocks are characterized by a coarse-grained texture because they contain?
Intrusive igneous rocks commonly have large mineral crystals.
What is the texture of Intrusive igneous rocks?
An igneous rock has two different textures. Extrusive rocks generally are smooth and glassy. Intrusive rocks are generally coarse
An intrusive igneous rock will have what type of texture?
Intrusive igneous rock has a coarse, visible crystalline texture. Intrusive igneous rocks are formed from slow cooling of magma. The additional time spent in a liquid state allows for the creation of larger mineral crystals. An igneous rock with a coarse texture is said to be phaneritic.
What is the relationship between an igneous rocks texture and where it formed?
The relationship between an igneous rock's texture and where it was formed is that the texture depends on whether or not the rock is an extrusive rock or an intrusive rock. Those two different types of classifications for rocks tell you what the texture will be. For example, Intrusive rocks have a coarse-grained texture like granite and extrusive rocks have a fine-grained texture like basalt.
What sample is igneous and has a coarse texture?
Granite
When large masses of magma solidify far below earths's surface they form igneous rocks that have a?
Coarse-grained texture
When large masses of magma solidify far below earth's surface they form igneous rocks that have?
Coarse-grained texture
When large masses of magma solidify far below Earths surface they form igneous rocks that?
Coarse-grained texture
When large masses magma solidify far below earths surface they form igneous rocks that have a?
Coarse-grained texture
What is the relationship between an igneous rock's texture and where it was formed?
The relationship between an igneous rock's texture and where it was formed is that the texture depends on whether or not the rock is an extrusive rock or an intrusive rock. Those two different types of classifications for rocks tell you what the texture will be. For example, Intrusive rocks have a coarse-grained texture like granite and extrusive rocks have a fine-grained texture like basalt.
What is the relationship between igneous rock's texture and where it is formed?
The relationship between an igneous rock's texture and where it was formed is that the texture depends on whether or not the rock is an extrusive rock or an intrusive rock. Those two different types of classifications for rocks tell you what the texture will be. For example, Intrusive rocks have a coarse-grained texture like granite and extrusive rocks have a fine-grained texture like basalt.
What is the texture of igneous rock?
Phaneritic is the texture of igneous rocks. These types of rocks crystallized slowly.
