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Author Question: How does a fringing reef around an oceanic island become an atoll? ... (Read 156 times)

jhjkgdfhk

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on: Aug 7, 2018
How does a fringing reef around an oceanic island become an atoll?

Question 2

What causes spring tides and neap tides to have different tidal ranges?


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Loise Hard

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Reply #1 on: Aug 7, 2018
Answer to Question 1

As a volcanic island subsides, the fringing reef grows upward, keeping pace with the seafloor subsidence, becoming a barrier reef when a lagoon develops and finally an atoll when the only solid material is the outer ring of coral.

Answer to Question 2

Spring tides occur every two weeks when the alignment of the Earth, Moon, and Sun increases the tidal range. During a neap tide, the Moon's gravitational pull is exerted at a 90 degree angle to that of the Sun, and so the pull of the two detract from each other.


jhjkgdfhk

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Reply 2 on: Aug 7, 2018
YES! Correct, THANKS for helping me on my review

xoxo123

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Reply 3 on: Yesterday
Excellent

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