BuyFind

Oceanography: An Invitation To Mar...

9th Edition
Garrison + 1 other
Publisher: Brooks Cole
ISBN: 9781305254282
BuyFind

Oceanography: An Invitation To Mar...

9th Edition
Garrison + 1 other
Publisher: Brooks Cole
ISBN: 9781305254282

Solutions

Chapter 5, Problem 1TC
Textbook Problem

Is the thickness of ooze always an accurate indication of the biological productivity of surface water in a given area? (Hint: See next question.)

Expert Solution
To determine

Whether the thickness of ooze has always been an accurate indication of the biological productivity of surface water in a given area.

Answer to Problem 1TC

The accretion of any kind of ooze depends on a subtle balance between the profusion of organisms at the ocean surface, the dissolution rate at after they reach the ocean bottom, and the rate of accumulation of terrigenous materials. Other factors that contribute to the accretion at the bottom are scouring currents and temperature, and pH conditions in the overlying water column through which the hard parts fall.

Explanation of Solution

An ooze is a deep-ocean sediment that contain at least 30% of biogenous material. Oozes originate from the remnants of organisms that settle on the bottom of the ocean floor. The organisms that contribute their remnants to the deep-ocean oozes are small, single-celled, migratory, plant-like organisms and the single-celled animals that feed on them. Once these organisms dies, their hard parts slowly settle down on the bottom, blends with fine-grained terrigenous clays and silts, and accumulate as ooze.

Oozes accumulate gradually, and the rate at which it accumulates is about 1 to 6 centimeters (1⁄2–21⁄2 inches) per thousand years. However, they accumulate more than 10 times as fast as deep-ocean terrigenous clays. Therefore, the accretion of any kind of ooze depends on a subtle balance between the copiousness of organisms at the ocean surface, the dissolution rate after they reach the ocean bottom, and the rate of accumulation of terrigenous materials. Other factors that contribute to the accumulation at the bottom are scouring currents and temperature, and pH conditions in the overlying water column through which the hard parts fall.

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Chapter 5 Solutions

Oceanography: An Invitation To Marine Science, Loose-leaf Versin
Ch. 5.3 - Which type of sediment is most abundant?Ch. 5.3 - Which type of sediment covers the greatest seabed...Ch. 5.3 - Which type of sediment is rarest? Where does this...Ch. 5.3 - Do most sediments consist of a single type? (That...Ch. 5.3 - How do neritic sediments differ from pelagic ones?Ch. 5.4 - Are neritic sediments generally terrigenous or...Ch. 5.4 - What is lithification? How is sedimentary rock...Ch. 5.4 - Can you think of an example of lithified sediment...Ch. 5.5 - Do you think marine ecosystems could be buried and...Ch. 5.5 - Is there a silicon dioxide compensation depth?Ch. 5.6 - Why are Atlantic sediments generally thicker than...Ch. 5.6 - How do turbidity currents distribute sediments?...Ch. 5.6 - What is the origin of oozes? What are the two...Ch. 5.6 - What is the CCD? How does it affect ooze...Ch. 5.6 - How do hydrogenous materials form? Give an example...Ch. 5.6 - How do evaporites form?Ch. 5.7 - How are sediments studied?Ch. 5.7 - How have studies of marine sediments advanced our...Ch. 5.8 - Would you say the memory of the sediments is long...Ch. 5.8 - How might past climate be inferred from studies of...Ch. 5.9 - What percentages of the total production of...Ch. 5.9 - What products containing marine sediments have you...Ch. 5.9 - Other than petroleum and natural gas, what is the...Ch. 5.9 - How far back in time can the memory of the ocean...Ch. 5 - Is the thickness of ooze always an accurate...Ch. 5 - What is the calcium carbonate compensation depth?...Ch. 5 - What sediments accumulate most rapidly? Least...Ch. 5 - Can marine sediments tell us about the history of...Ch. 5 - What problems might arise when working with...Ch. 5 - Given an average rate of accumulation, how much...Ch. 5 - Microtektites are often found in fieldselongated...Ch. 5 - How much faster do fragments of diatoms fall when...

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