Dating 2 years apart


Impurities in ice cores may depend on location. Coastal areas are more likely to include material of marine origin, such as sea salt ions . Greenland ice cores contain layers of wind-blown dust that correlate with cold, dry periods in the past, when cold deserts were scoured by wind. Radioactive elements, either of natural origin or created by nuclear testing , can be used to date the layers of ice. Some volcanic events that were sufficiently powerful to send material around the globe have left a signature in many different cores that can be used to synchronise their time scales.

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Dating 2 years apart

Dating 2 years apart



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