Sentences with phrase «older volcanic events»
By contrast, volcanic eruptions occurring in the 2,000 years before that can not be dated reliably, while the dates of even older volcanic events can be determined relatively accurately using the C14 method.
https://www.sciencedaily.com/ Not exact matches
The team determined that the basalts from Baffin Island, formed by a 60 - million - year - old eruption from the mantle hot - spot currently located beneath Iceland, and the Ontong - Java Plateau, which was formed by an enormous volcanic event about 120 million years ago, contain slightly more tungsten - 182 than other young volcanic rocks.