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#KT microfossil extinction exactly at #Chicxulub-derived impact layer, Blake Nose: Norris et al 1999 http://t.co/vWSQLU8LTc … #KTImpactRecap
#KT microfossil extinction exactly at #Chicxulub-derived impact layer, Blake Nose: Norris et al 1999 http://t.co/vWSQLU8LTc … #KTImpactRecap
#KT microfossil extinction exactly at #Chicxulub-derived impact layer, Blake Nose: Norris et al 1999 http://t.co/vWSQLU8LTc … #KTImpactRecap