History of Rock Worksheet
Assignment: History of Rock
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In one way or another plate tectonics influences most of the rocks and sediments we find underneath our feet. In this assignment you were supposed to examine the connection between plate tectonics and both igneous and metamorphic rocks
500 to 700 words. You did an excellent job with that assignment. Your assessment of the connection between the types of rocks and the action of plate tectonics was great, and your formatting was good. You also had good citations and references. Well done!
Remove the above and put everything into your own words into the Comparison Worksheet that is located in your Materials page on your UOP website.. This worksheet has been submitted through plagiarism checker.
Write a 500- to 750-word explanation regarding the role of plate tectonics in the origin of igneous rocks.
Plate Tectonics play a role in igneous rocks. Another name for igneous rocks is called “fire rocks” and is formed either above or underground. (Cliffsnotes.com) When the underground formation occurs and the melted rock is called magma and is deep within the earth it becomes a trap in small pockets. While these magma pockets cools slowly underground, the magma becomes an igneous rock. Another way igneous rock is formed is when volcanoes erupt in areas which make the magma to rise above the Earth’s surface and when this action does occur this is called lava. We have asked ourselves how to determine which rock is what intrusive or extrusive rock? The only time igneous rocks occur is when the lava cools above the ground and is called an extrusive rock. Many do not realize that inside the earth it is very hot and is hot enough to melt rocks and the deeper you go it is hotter. The earth’s surface becomes lava and even the material has not changed just the name of it.
The magma itself goes through several stages as it cools off. Fresh magma is white when it is hot and it starts to cool and it will turn to a yellow shade, and then it turns to various shades of red. Whenever it is cool enough it will form into an igneous rock such as granite and basalt (askville.amazon.com) Igneous rocks has a forming process and has several stages such as the process of granite, if cooling is “slow” like thousands or millions of years to process this for the minerals to grow enough a naked eye such as granite. Because of the coarse texture that granite produces. If this cooling process is “quick” such as days to weeks then the minerals does not have time to grow and they are not seen with the naked eye like granite does and this rock has a fine grain to it and this can be described to the rhyolite. (askville.amazon.com) The last igneous rock process is thee scoria where these cool very quickly like in hours to days and the compounds are frozen in place, and there are no minerals that form and the result is a glass form. (askville.amazon.com) Since there are different distributions that is related in the plate tectonic process and the history of the earth, the final outcome is that igneous rocks are found in different areas. Igneous rocks are found where the plates are diverging, and such as lava while it rises and fills the gaps between the plates. When the sub-ducting plates melt it will sink into the crust of the earth, when the melting raises into the overriding plate this process starts forming volcanoes. There is many ways igneous rocks can be formed and they are molten rock and magma material that is consisting of liquid gas and crystals. Basaltic magma which is super-hot that ranges from 900* to 1200*C and silicic and highly fluid magma which is much cooler than 850*C and highly viscous (jmu.edu.com) One other thing is magma is associated with other plate tectonics. Plate tectonics is the study on how the Earth plates are driven and shaped by the geological forces that keep them in constant motion.
