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Geolocation
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Author - title
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Year
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| details | Late Maestrichtian | Canada(Alberta) | Sweet,A.R. et al. Sequential palynological changes across the composite Cretaceous - Tertiary (K/T) Boundary claystone and contiguous strata, western Canada and Montana, U.S.A. | 1999 | |
| details | Late Maastrichtian | Canada(NWT,Mackenzie) | Sweet,A.R. et al. Cretaceous - Tertiary palynofloral perturbations and extinctions within the Aquilapollenites Phytogeographic Province. | 2001 |