I have no idea, but I wouldn't use Wikipedia.. The "facts" on there aren't always true. That's why we aren't allowed to use it in my high school.
They're covered by sedimentary rock .
Hope this helps :) !!
Answer:
66
Explanation:
its 66 because the highest number is 88 and the lowest is 22 and the difference is 66
The correct answer would be spring tide.
I hope this helps.