Student Name Lab section Date SYNTHESIS QUESTIONS With the help of your textbook
ID: 286248 • Letter: S
Question
Student Name Lab section Date SYNTHESIS QUESTIONS With the help of your textbook and/or Internet resources, answer the following questions. List the source of your information when used to write the answer. Deep Marine Environments 1. What are the typical sediments deposited on the deepest section of the Pacific Ocean? 2. Under which circumstances could igneous rocks be found in this setting? Continental Shelf Environments 3. Compare and contrast the North America Eastern and Western seaboard. How does the morphology of the two shelves differ? What geologic processes characterize each side? 4. Sketch an East-West topographic/cross section profile, showing the shape and the plate boundaries on each side. 5. What type of sediments-in terms of textural maturity-will be deposited on either side of North America? What is the role of rivers in shaping the depositional environments of the continental shelves? 6.Explanation / Answer
1. The Pacific Ocean is largest & deepest Ocean compares to other four oceans.Here deep flat & level features on Earth are located. This is called Abyssal plain. Such places are accumulates with thick sediments. The fine sediments settling here by carried out to sea by turbidity currents. The Pacific Ocean is consists a large amount of deep-ocean trenches. These trenches are trap the sediments(mostly Silt & clay) and prevents from moving farher. Pelagic sediments, Maganese nodules are quite common in these areas.
2. At Oceanic trenches the igneous rocks to be found. Where a continental crust converged with the oceanic plate the less dense continental crust mass remains floating while the more dense oceanic crust sinks into the mantle along the line of the oceanic tench. Due to this the inner trench wall marks consists of igneous and metamorphic crust. Thr rock cycle shows the relationship between trenches and igneous rocks. When sedimentary rocks are deeply buried, the temparature and pressure turn into metamorphic rocks. Intense heat at great depths melts metamorphic rocks and produces magma. The magma may rise up and reach the earth's surface where it cools to form igneous rocks.
3. East Coast refers to the easternmost states of the U.S. which stretch from the Atlantic Ocean in the east to Canada in the north; West Coast refers to the westernmost coastal states touching the Pacific Ocean. The morphology of two shelves are different because of plate tectonic activity the western coast became steep without much chance to accumulate the sediments. Here barrier and fringing islands are common. While East Coast has a long, gently slope to accumulate the sediments from coastline.
ques 4&5,6...no idea.