a) about 5-10 years
b) about 100 years near trenches and 1,000 years around mid-ocean ridges
c) reduced during glacial epochs
d) very long, some probably stretch back to the time of the origin of life
I am having the hardest time finding the answer to this. Can someone please help, and if possible could you share where you found the answer. Thank you.
b) about 100 years near trenches and 1,000 years around mid-ocean ridges
c) reduced during glacial epochs
d) very long, some probably stretch back to the time of the origin of life
I am having the hardest time finding the answer to this. Can someone please help, and if possible could you share where you found the answer. Thank you.