Which of the following correctly lists the climate indicated by a lower 18O/16O ratio in ocean sediment cores and a climate indicated by a higher ocean sediment core 18O/16O ratio?
A)Cooler; warmer.
B)Warmer; cooler.
C)Cooler; cold.
D)Warmer; hot.

Question

Quizplus · Accepted Answer

A lower 18O/16O ratio in ocean sediment cores indicates a warmer climate, as lighter 16O evaporates more easily and is more prevalent in precipitation during warmer periods. A higher 18O/16O ratio indicates a cooler climate, as more 16O is trapped in ice sheets, leaving the ocean enriched in 18O.

Which of the Following Correctly Lists the Climate Indicated by a Lower