▁the ▁P li oc ene . ▁The ▁large ▁but ▁apparently ▁cr ater less ▁El tan in ▁impact ▁( 2 . 5 ▁Ma ) ▁into ▁the ▁Pacific ▁Ocean ▁has ▁been ▁suggested ▁as ▁contrib uting ▁to ▁the ▁gla ci ations ▁and ▁cool ing ▁during ▁the ▁P li oc ene . ▁ ▁L arg est ▁cr aters ▁( 1 0 ▁Ma ▁or ▁more ) ▁C rat ers ▁with ▁diameter ▁ ▁or ▁more ▁are ▁all ▁older ▁than ▁ 1 0 ▁Ma , ▁except ▁possibly ▁Kar ak ul , ▁, ▁whose ▁age ▁is ▁uncertain . ▁ ▁There ▁are ▁more ▁than ▁forty ▁cr aters ▁of ▁such ▁size . ▁The ▁largest ▁two ▁within ▁the ▁last ▁hundred ▁million ▁years ▁have ▁been ▁linked ▁to ▁two ▁ext inction ▁events : ▁Ch ic x ul ub ▁for ▁the ▁C ret ace ous – P ale ogene ▁and ▁the ▁Pop ig ai ▁impact ▁for ▁the ▁E oc ene – O lig oc ene ▁ext inction ▁event . ▁ ▁Lar ge ▁un conf ir med ▁cr aters ▁The ▁largest ▁un conf ir med ▁cr aters ▁ ▁or ▁more ▁are ▁significant ▁not ▁only ▁for ▁their ▁size , ▁but ▁also ▁for ▁the ▁possible ▁co eval ▁events ▁associated ▁with ▁them . ▁For ▁example , ▁the ▁Wil kes ▁Land ▁cr ater ▁has ▁been ▁connected ▁to ▁the ▁massive ▁Perm ian – Tri ass ic ▁ext inction ▁event . ▁The ▁sort able ▁table ▁has ▁been ▁arranged ▁by ▁diameter . ▁ ▁All ▁cr aters ▁listed ▁alphabet ically ▁, ▁the ▁Earth ▁Imp act ▁Database ▁( E ID ) ▁contains ▁ 1 9 0 ▁confirmed