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Oxygen Isotope Ratios in Greenland and Antarctic Glaciers

Question 40

Multiple Choice

Oxygen isotope ratios in Greenland and Antarctic glaciers:


A) reflect sea surface temperatures 500 million to one billion years ago.
B) are the most useful method for determining global temperatures in the past 100 years.
C) reflect atmospheric temperatures within the past 110,000 years.
D) directly measure the temperature of the ocean depths 10,000 years ago.

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