Carbon dioxide levels in Earth's atmosphere — and, consequently, ocean temperatures — are rising. How high and how fast ocean temperatures can rise can be learned from temperature measurements of ancient oceans. At the same time, energy exploration also relies on knowing the thermal history of oil and gas source rocks, which is often difficult to determine. One of the most promising techniques for measuring ancient ocean temperatures and basin thermal histories relies on the co-enrichment of rare heavy oxygen and heavy carbon in the calcium carbonate compound found at the bottom of the ocean.

https://www.miragenews.com/choosing-social-media-channels-universities-1058125/

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