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Geolocation
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Author - title
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Year
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| details | Late Maastrichtian | Maryland | Landman,N.H. et al. Cephalopods from the Cretaceous/Tertiary Boundary Interval on the Atlantic Coastal Plain, with a description of the Highest Ammonite Zones in North America. Part 1. Maryland and North Carolina | 2004 | |
| details | Late Eocene | Early Oligocene | Italy | Mourik,C.A.Van et al. The Massignano Eocene-Oligocene golden spike section revisited. | 2005 |