The chemical signature of volcanic ash layers can be used to correlate sites across vast regions.

Name: The chemical signature of volcanic ash layers can be used to correlate sites across vast regions.
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The chemical signature of volcanic ash layers is unique to each eruption and can be used to identify and correlate sites across large geographic areas. This technique is called tephrochronology and is commonly used in geology, archaeology, and paleontology.

The Chemical Signature of Volcanic Ash Layers Can Be Used