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Author Question: What is often found in the middle of manganese nodules? a. Microtektites b. Shark teeth or bone ... (Read 62 times)

tichca

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on: Aug 22, 2018

What is often found in the middle of manganese nodules?
  a. Microtektites
  b. Shark teeth or bone fragments
  c. Living bacteria
  d. Sand grains



Question 2

Which statement describes turbidites?
  a. They are graded layers of terrigenous sand mixed with finer pelagic sediments.
  b. They are propelled into position by gravity rather than water currents.
  c. They are composed of distinct layers that represent various turbidity current events.
  d. All of these choices are true about turbidites.



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mcabuhat

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Reply #1 on: Aug 22, 2018
Answer to Question 1

ANS: B
There is often a nuclei of sorts in the center of manganese nodules. This can be shark teeth, bone
fragments, or the skeletons of microscopic plankton. Information can be found in the section Pelagic
Sediments Vary in Composition and Thickness.



Answer to Question 2

ANS: D
Turbidites are graded layers of terrigenous sediments that become combined with finer pelagic
sediments. These are carried by turbidity current which in themselves are propelled by gravity rather
than water currents. Due to the layering of turbidites, it is possible to distinguish individual turbidity
events. Information can be found in the section Pelagic Sediments Vary in Composition and Thickness.



tichca

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Reply 2 on: Aug 22, 2018
Gracias!

LVPMS

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Reply 3 on: Yesterday
Excellent

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