Tag Archives: chemostratigraphy

K-Pg Extinction Event: Theories

The K-Pg boundary extinction event has several distinct characteristics that can be used to differentiate between possible causes. Supernova Cosmic radiation from a nearby supernova could be responsible for the mass extinctions and the iridium layer. However, the boundary should … Continue reading

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K-Pg Extinction Event: Boundary Characteristics

The end of the Cretaceous period and the start of the Paleogene period 65.5 million years ago is marked by a global extinction event at the K-Pg boundary. The Paleogene was previously part of the Tertiary before the term was … Continue reading

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Oxygen Isotopes

How are oxygen isotopes used in the correlation of Quaternary sediments? Chemostratigraphy is using stable isotopes in determining stratigraphic ages. Isotopes are variations in the number of neutrons of a particular element. Some isotopes, like oxygen ¹⁶O and ¹⁸O, have … Continue reading

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