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However, thanks to large mistake margins in the dating of the eruptions, the job of the Deccan Traps in the K-Pg extinction continues to be unclear. Proponents take into account the climatic impression of the sulphur dioxide unveiled to have been on par with the Chicxulub affect, and also note the part of flood basalt volcanism in other mass extinctions like the Permian-Triassic extinction occasion. They take into consideration the Chicxulub influence to have worsened the ongoing climate modify brought about by the eruptions. The eruptions can be divided into 3 phases about the K-Pg boundary, two prior to the boundary and one particular immediately after. Non-avian dinosaur remains have at times been found above the K-Pg boundary. It continues to be uncertain no matter if the variety of dinosaurs was in gradual decline right before the K-Pg extinction function, or irrespective of whether dinosaurs have been basically thriving prior to the extinction. The bolide impact hypothesis, to start with brought to broad interest in 1980 by Walter Alvarez, Luis Alvarez, and colleagues, attributes the K-Pg extinction party to a bolide (extraterrestrial projectile) impression.