Sr isotope dating russian dating community

31-Dec-2019 19:21

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Sometimes, by chance these creatures also incorporate the element strontium into their shells -- strontium is an element in seawater that is chemically similar to calcium but found in much lower concentrations.

For every 1000 calcium atoms, seashells contain just a few atoms of strontium.

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Or, jump right in and watch the three Sea Change videos.Millions of years later, researchers can determine the age of marine fossils by extracting the strontium and comparing the ratio of the two isotopes with ratios known to have occurred in seawater in the past.