University of South Florida Sediments and Residues of The Organisms Questions

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For this assignment, you will bring together the important points and concepts of the Module by responding to a series of short-answer questions. If you choose to use outside sources for information, be sure to use only reliable Internet sites (.edu, .gov, .org, mbari, NatGeo, Smithsonian). You may also use scientific articles. At the end of the assignment, be sure to cite the source(s) that you used to answer the question(s).

Please submit a .docx file.

I. Biogenous sediments

(5 pts)

A. Name the two groups of organisms that contribute mostly to biogenous sediment.

B. Name the 2 organisms that produce biogenous siliceous ooze.

C. When siliceous ooze lithifies, it is called what?

D. Name the 2 organisms that produce biogenous calcareous ooze.

E. When calcareous ooze lithifies, it is called what?

II. Coring

(5 pts)

You have been tasked to obtain a core in order to collect data about events occurring on Earth many millions of years ago. You have two choices when it comes to obtaining the core: ice core or ocean sediment core. Which one should you choose to give you the information you seek? Remember to explain WHY for full credit.

III. Longshore Current

(5 pts)

A. Why does the direction of longshore current sometimes reverse in direction?

B. What is the primary direction of longshore current along our Atlantic coast?

C. How does this primary direction compare with the direction of the Gulf Stream? Do they interfere with one another?

IV. Coastal Waters

(5 pts)


1. What do plants at the top of the dunes have to adapt to the most? What are some adaptations they use to combat these forces?


2. How does water movement differ from close-to-shore to further off-shore? What factors are influencing this?


3. Explain how waves are able to sort sediments. Where would you find the coarsest sediments being moved by wave energy?


4.Why do we look at sediment cores of beach sediment? What can sediment cores on the beach tell us?


5. Why do we do beach profiling? Who would this information be beneficial to?

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