How do oceanographers use the sediment record toreveal information about the evo

Question

How do oceanographers use the sediment record toreveal information about the evolution of life in the surfacewaters, the chemistry of seawater, and glacial-interglacialfluctuations in ice volume? Thank you in advance for your time!!! How do oceanographers use the sediment record toreveal information about the evolution of life in the surfacewaters, the chemistry of seawater, and glacial-interglacialfluctuations in ice volume? Thank you in advance for your time!!! Thank you in advance for your time!!!

Explanation / Answer

I'm no oceanographer, but I think I can help you with a few of the points in your question.  If I'm not mistaken, I believe that the sediment record holds fossils.  Thus, if we dug up a core of the sediment record, we could dig through it and see the progress of sea animals (ones with shells and bones that don't decay as readily as flesh).  I'm not exactly sure how oceanographers detect the chemistry of seawater from the sediment record, but I'm sure it must have to do with the concentrations of various compounds.  However, I do know that we can tell the glacial-interglacial fluctuations in ice volume from the sediment record by analyzing the amount of salt in various divisions.  If there's more ice, the salt gets concentrated in the seas more because glaciers are all frozen freshwater.  Hope this helps!

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