On the Ocean Floor

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On to the Ocean Floor A classic ophiolite sequence consists of the following layers: peridotite, gabbro, sheeted dikes, and pillow basalt (from bottom to top). The peridotite is iron and magnesium rich as well as extremely dense. The gabbro layer is produced by the partial melting from the underlying mantle. Sheeted dikes are also referred to as "feeder tubes" that carry magma upward through the chambers. The magma then erupts on the ocean floor to form the pillow basalts. Geologists have determined that it is from the ocean floor and was pushed up during the plate convergences. At Stop #1, Peridotite, I learned that the Smith River is one of the world's largest exposures to peridotite. There are several photographs depicting the Smith River as well as one showing the orange and green colors of the peridotite. Another photo shows the rough outer exterior of the peridotite. At Stop #2, Layered Gabbro, there is a photo of a sand and gravel beach as well as one of a layered rock. The rock in the picture appears similar to a sedimentary rock, but is actually a discontinuous, mixture of light and dark, layered rock. I learned that these color differentiations are produced by the olivine and pyroxene (dark layer) and the plagioclase and pyroxene (light layer).

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At Stop #3, Sheeted Dikes, a photograph of dikes is displayed. This picture is across a river and one can easily see the slanted area of the dikes. This section also reemphasizes the notion that sheeted dikes are responsible for carrying magna upward through the chambers. At Stop #4, Pillow Basalt, the location is Middle Fork of the Smith and there are several pictures of exposed pillow breccia and limestone. I learned that pillow basalt results from the magna brought upward by the sheeted dikes which in turn erupts onto the ocean floor. Please note that this sample paper on On the Ocean Floor is for your review only. In order to eliminate any of the plagiarism issues, it is highly recommended that you do not use it for you own writing purposes. In case you experience difficulties with writing a well structured and accurately composed paper on On the Ocean Floor, we are here to assist you. Your persuasive essay on On the Ocean Floor will be written from scratch, so you do not have to worry about its originality.

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