High Quality Content by WIKIPEDIA articles! The climate across the Cretaceous-Paleogene boundary (K-Pg or formerly the K-T Boundary) is very important to geologic time as it marks a catastrophic global extinction event. Numerous theories have been proposed as to why this extinction event happened including an asteroid known as the Chicxulub asteroid, volcanism, or sea level changes. While the mass extinction is well documented, there is much debate about the immediate and long term climatic and environmental changes caused by the event . The terrestrial climates at this time are poorly known which limit the understanding of environmentally driven changes in biodiversity that occurred before the Chicxulub crater impact. Oxygen isotopes across the K-T boundary suggest that oceanic temperatures fluctuated in the Late Cretaceous and through the boundary itself. Carbon isotope measurements of benthic foramifinera at the K-T boundary suggest rapid, repeated fluctuations in oceanic...

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