History of Rocks
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- Category: Science
- Date Submitted: 07/14/2012 02:14 PM
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Associate Level Material
History of Rock Worksheet
Write a 500- to 750-word explanation regarding the role of plate tectonics in the origin of igneous rocks.
|The role of plate tectonics in the origin of igneous rocks is very important. Igneous rocks are formed within three main areas; at|
|lithospheric plates that are pulled at the ridges of the mid-ocean areas, seduction zones are where the plates join together, and |
|where the continental crust has been pushed together. There are two ideas that are voiced when it comes to igneous rocks. The |
|first idea is that igneous rocks do evolve meaning they can change from one type of rock into another. The second idea is that |
|rocks are not distributed randomly throughout the Earth. Certain types of rocks are usually found in a specific area for a |
|particular reason, yet all of these are combined into the process of plate tectonics. The word igneous stems from the Latin word |
|“fire”. Igneous rocks start out as a liquid hot material. The material could have been from lava that had been erupted at the |
|Earth’s surface, un-erupted lava or magma at shallow depths, or even plutons (magma that is in a deep body). People usually think |
|of magma or lava as a liquid comparable to liquid metal. However, geologists have found that magma is mostly a liquid that has a |
|load of the mineral crystals in it and has the consistency of mush. Magma then crystallizes into a corporation of minerals and |
|some of these minerals crystallize faster than the others. When these minerals crystallize they leave the remnants of the liquid |
|that has a changed chemical composition. As magma cools it eventually starts evolving as it goes through the crust and interacts |
|with other rocks. You can tell the types of these igneous rocks by the texture of the rocks from the mineral grain size. |
|Extrusive rocks cool more quickly from seconds to months and have very small...
History of Rock Worksheet
Write a 500- to 750-word explanation regarding the role of plate tectonics in the origin of igneous rocks.
|The role of plate tectonics in the origin of igneous rocks is very important. Igneous rocks are formed within three main areas; at|
|lithospheric plates that are pulled at the ridges of the mid-ocean areas, seduction zones are where the plates join together, and |
|where the continental crust has been pushed together. There are two ideas that are voiced when it comes to igneous rocks. The |
|first idea is that igneous rocks do evolve meaning they can change from one type of rock into another. The second idea is that |
|rocks are not distributed randomly throughout the Earth. Certain types of rocks are usually found in a specific area for a |
|particular reason, yet all of these are combined into the process of plate tectonics. The word igneous stems from the Latin word |
|“fire”. Igneous rocks start out as a liquid hot material. The material could have been from lava that had been erupted at the |
|Earth’s surface, un-erupted lava or magma at shallow depths, or even plutons (magma that is in a deep body). People usually think |
|of magma or lava as a liquid comparable to liquid metal. However, geologists have found that magma is mostly a liquid that has a |
|load of the mineral crystals in it and has the consistency of mush. Magma then crystallizes into a corporation of minerals and |
|some of these minerals crystallize faster than the others. When these minerals crystallize they leave the remnants of the liquid |
|that has a changed chemical composition. As magma cools it eventually starts evolving as it goes through the crust and interacts |
|with other rocks. You can tell the types of these igneous rocks by the texture of the rocks from the mineral grain size. |
|Extrusive rocks cool more quickly from seconds to months and have very small...