Exam notes on geology

Apr 15th, 2015
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Learn the important notes on geology.

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1. Discuss in detail the formation of sedimentary rocks. Also, include in your answer information concerning their composition, lithification and naming?Answer: Sedimentary rocks are formed by burial, compression, and chemical modification of deposited weathered rock debris or sediments at the earth's surface.Lithification is the process of converting sedimentary rocks through compaction, dessication, cementation and crystalisation.Types of sedimentary rocks are Slate, limestone, sandstone, halite and gypsum2. Explain why the theory of plate tectonics explains the lithospheric phenomena like earthquakes, mountains, volcanoes, folding and faulting.Answer: The theory of the plate tectonics suggest that the earth's outer crust is composed of a number of plates that float on the mantle.There are three situations in which the collision of convergent plate occur namely:1. Collision of two oceanic plates2. Collision of two continental plates and3. Collision of oceanic and continental platesAs a result of these plates' collision, the mountains are formed, volcanoes are erupted, fold mountain ranges, faulting is caused and earthquakes is resulted.3. Describe the various types of igneous rocks that exist according to crystal size, the magma chemistry, and the quantity of various minerals types?Answer: There are four types of igneous rocks that exists according to crystal size.1. Felsic magma which contains relatively high quantities of sodium (Na), Aluminum (AI), and pota

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