What factor allows for the carbon present in sediments to re-enter back into atmospheric and oceanic
cycles?
a. Geological uplift
b. Acid rain
c. Sediments dissolving
d. All of these choices
ANS: D
Geological uplift can expose carbonate rock to chemical reactions with oxygen. Acid rain on limestone
rock can release carbon dioxide. Lastly, sediments can also dissolve which would release the carbon
dioxide that is stored in it. Information can be found in the section Gases Dissolve in Seawater.
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