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Author Question: What is a method by which the present rate of motion between two plates can be measured accurately? ... (Read 49 times)

tatyanajohnson

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on: Jul 15, 2018
What is a method by which the present rate of motion between two plates can be measured accurately? What will be an ideal response?

Question 2

How are hot spots used for determining the absolute motions of plates? What will be an ideal response?


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aadams68

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Reply #1 on: Jul 15, 2018
Answer to Question 1

The travel of a laser beam can be timed from one plate to another by bouncing it from a satellite and
by calculating the difference in arrival times of a quasar signal at two plates over a period of time.



Answer to Question 2

Hot spots appear to be fixed in the mantle relative to each other, so they can be used as a reference
frame. If the age of a basalt and its distance from the hot spot is determined, then the rate of movement
of that rock can be calculated. If a number of these samples are taken from various distances from the
hot spot, the calculation can be quite accurate.



tatyanajohnson

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Reply 2 on: Jul 15, 2018
Gracias!

chereeb

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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