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These additions have been used in research related to the Cretaceous–Paleogene extinction event and the ensuing recovery, [6] and to the Anthropocene debate, [5] respectively. However, the ages that stretch into the Cretaceous are sometimes referred to as " North American land vertebrate ages " to reflect the fact that mammals, while still ...
Despite the western upheaval, the eastern US had achieved geological stability by the Late Cretaceous. [72] The weather was uniformly warm and rainy throughout the year. [85] Flowering plants were now common and fossil of broadleaf trees and shrubs were preserved in Late Cretaceous rocks. [85] The Cretaceous ended with another mass extinction.
The Late Cretaceous (100.5–66 Ma) is the younger of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series. The Cretaceous is named after creta, the Latin word for the white limestone known as chalk.
Pages in category "Late Cretaceous mammals of North America" The following 18 pages are in this category, out of 18 total. This list may not reflect recent changes .
This is an incomplete list that briefly describes vertebrates that were extant during the Maastrichtian, a stage of the Late Cretaceous Period which extended from 72.1 to 66 million years before present. This was the last time period in which non-avian dinosaurs, pterosaurs, plesiosaurs, and mosasaurs existed.
Dryolestida is an extinct order of mammals, known from the Jurassic and Cretaceous. They are considered basal members of the clade Cladotheria, close to the ancestry of therian mammals. It is also believed that they developed a fully mammalian jaw and also had the three middle ear bones. Most members of the group, as with most Mesozoic mammals ...
Late Cretaceous mammals (3 C, 3 P) E. Early Cretaceous mammals (5 C, 7 P) Σ. Cretaceous mammal stubs (112 P) Pages in category "Cretaceous mammals"
During the Cenozoic, mammals proliferated from a few small, simple, generalised forms into a diverse collection of terrestrial, marine, and flying animals, giving this period its other name, the Age of Mammals. The Cenozoic is just as much the age of savannas, the age of co-dependent flowering plants and insects, and the age of birds. [40]