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The Cretaceous as a separate period was first defined by Belgian geologist Jean d'Omalius d'Halloy in 1822 as the Terrain Crétacé, [3] using strata in the Paris Basin [4] and named for the extensive beds of chalk (calcium carbonate deposited by the shells of marine invertebrates, principally coccoliths), found in the upper Cretaceous of ...
Cretaceous animals of South America (6 C, 11 P). Late Cretaceous animals (8 C) E. Early Cretaceous animals (10 C, 1 P) I. Cretaceous invertebrates (12 C) V.
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.
The Maastrichtian (/ m ɑː ˈ s t r ɪ k t i ə n / mahss-TRIK-tee-ən) is, in the International Commission on Stratigraphy (ICS) geologic timescale, the latest age (uppermost stage) of the Late Cretaceous Epoch or Upper Cretaceous Series, the Cretaceous Period or System, and of the Mesozoic Era or Erathem. It spanned the interval from .
Ceratopsia or Ceratopia (/ ˌ s ɛr ə ˈ t ɒ p s i ə / or / ˌ s ɛr ə ˈ t oʊ p i ə /; Greek: "horned faces") is a group of herbivorous, beaked dinosaurs that thrived in what are now North America, Asia and Europe, during the Cretaceous Period, although ancestral forms lived earlier, in the Late Jurassic of Asia.
The Cretaceous–Paleogene extinction event was a large-scale mass extinction of animal and plant species in a geologically short period of time, approximately (Ma). It is widely known as the K–T extinction event and is associated with a geological signature, usually a thin band dated to that time and found in various parts of the world ...
Prehistoric mammals of the Cretaceous Period. Subcategories. This category has the following 9 subcategories, out of 9 total. Cretaceous mammals of ...
Map of the Great Artesian Basin, which is seen as the remnant of the ancient inland sea of Eromanga. All the geological formations from which fossils attributed to Kronosaurus have been discovered are located in the Great Artesian Basin (GAB). [126] During the Lower Cretaceous, this geographical area was flooded by an inland sea known as the ...