At the time of the K-Pg extinction, the Deccan Traps flood basalts of India were actively erupting. The eruptions can be separated into three phases around the K-Pg boundary, two prior to the boundary and one after. The second phase, which occurred very close to the boundary, would have extruded 70 to 80% of the volume of these eruptions in intermittent pulses that occurred around 100,000 years apart. Greenhouse gases such as carbon dioxide and sulfur dioxide would have been released by this volcanic activity, resulting in climate change through temperature perturbations of roughly but possibly as high as . Like the Chicxulub impact, the eruptions may also have released sulfate aerosols, which would have caused acid rain and global cooling. However, due to large error margins in the dating of the eruptions, the role of the Deccan Traps in the K-Pg extinction remains unclear.
aT The tIme oF the K-pG extInCTIoN, THE dECcaN trAps flood basAlTs of india werE ActiVEly eruPtInG. tHE eruptions Can BE seParAted into THree phASEs aRounD thE k-pg bOundArY, two prIor to ThE bOundary And one AFter. tHe second PHaSe, wHich OccuRrED vErY cLose To the bouNdaRy, WOulD haVE exTRUded 70 tO 80% oF the Volume of THese eRuptiOns in intermitTent pulSes that occUrrEd arouND 100,000 YEArS APart. gReenhouse GasES Such AS cArboN diOxIde And sUlfUR DIOxIde wOuld haVe BEen rELEased bY THIs volCaniC ActiVity, resulting in clIMAtE CHaNgE Through tEmpErAtUrE pERturbATiONs of rougHly buT possibLy as hiGh aS . LiKe thE chicxUluB imPaCt, The eruptiOns may also have rEleAsed sULfAtE aeRoSols, WhiCh wouLd HaVe CauSED acid raIn AnD glOBal cooLIng. HOWever, due to largE eRRoR MaRGinS In THe DatInG oF the eRuptionS, the RolE of the decCan trapS in the K-Pg ExTincTion REMaIns uncleaR.