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Author Question: How do sedimentary cores from the ocean floor support the concept of seafloor spreading? What ... (Read 121 times)

littleanan

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on: Jul 14, 2018
How do sedimentary cores from the ocean floor support the concept of seafloor spreading?
 
  What will be an ideal response?

Question 2

What is the age of the oldest sediments recovered using deep-ocean drilling? How do the ages of these sediments compare to the ages of the oldest continental rocks?
 
  What will be an ideal response?


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EAN94

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Reply #1 on: Jul 14, 2018
Answer to Question 1

Sedimentary cores show patterns of magnetized rock thanks to the natural compass properties of magnetite. The cores from either side of the ocean ridge have patterns that match both in strata thickness and in paleomagnetism.

Answer to Question 2

The oldest seafloor sediments recovered are 180 million years old. This is much much younger than the oldest continental rock, which exceeds 4 billion years in age.


littleanan

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Reply #2 on: Jul 14, 2018
Correct answers!


EAN94

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Reply #3 on: Jul 14, 2018
Great! Please up vote :D


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