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  2. Cretaceous - Wikipedia

    en.wikipedia.org/wiki/Cretaceous

    The Cretaceous was a period with a relatively warm climate, resulting in high eustatic sea levels that created numerous shallow inland seas. These oceans and seas were populated with now-extinct marine reptiles, ammonites, and rudists, while dinosaurs continued to dominate on land. The world was largely ice-free, although there is some evidence ...

  3. Cretaceous–Paleogene extinction event - Wikipedia

    en.wikipedia.org/wiki/Cretaceous–Paleogene...

    The results of this study, which were based on estimated real global biodiversity, showed that between 628 and 1,078 non-avian dinosaur species were alive at the end of the Cretaceous and underwent sudden extinction after the Cretaceous–Paleogene extinction event. [136]

  4. Mesozoic - Wikipedia

    en.wikipedia.org/wiki/Mesozoic

    The Mesozoic Era [3] is the era of Earth's geological history, lasting from about , comprising the Triassic, Jurassic and Cretaceous Periods.It is characterized by the dominance of gymnosperms such as cycads, ginkgoaceae and araucarian conifers, and of archosaurian reptiles such as the dinosaurs; a hot greenhouse climate; and the tectonic break-up of Pangaea.

  5. List of periods and events in climate history - Wikipedia

    en.wikipedia.org/wiki/List_of_periods_and_events...

    Cretaceous–Paleogene boundary and Cretaceous–Paleogene extinction event, extinction of dinosaurs: 55.8: Paleocene–Eocene Thermal Maximum: 53.7: Eocene Thermal Maximum 2: 49: Azolla event may have ended a long warm period 5.3–2.6: Pliocene climate became cooler and drier, and seasonal, similar to modern climates. 2.5 to present

  6. Climate across Cretaceous–Paleogene boundary - Wikipedia

    en.wikipedia.org/wiki/Climate_across_Cretaceous...

    In the Late Cretaceous, the climate was much warmer than present; however, throughout most of the period, a cooling trend is apparent. The tropics were much warmer in the early Cretaceous and became much cooler toward the end of the Cretaceous. [5] 70 million years ago in the Late Cretaceous, the Earth was going through a greenhouse phase.

  7. Timeline of Cretaceous–Paleogene extinction event research

    en.wikipedia.org/wiki/Timeline_of_Cretaceous...

    Sullivan argued that dinosaur biodiversity experienced a marked decline over the last ten million years of the Cretaceous Period. [94] Stromberg and others reported that fossil pollen from the Hell Creek Formation provided evidence for a gradual shift in the region's flora "from more open to more closed and moist habitats". [41] 1999

  8. Late Cretaceous - Wikipedia

    en.wikipedia.org/wiki/Late_Cretaceous

    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.

  9. Baryonyx - Wikipedia

    en.wikipedia.org/wiki/Baryonyx

    Baryonyx (/ ˌ b ær i ˈ ɒ n ɪ k s /) is a genus of theropod dinosaur which lived in the Barremian stage of the Early Cretaceous period, about 130–125 million years ago.The first skeleton was discovered in 1983 in the Smokejack Clay Pit, of Surrey, England, in sediments of the Weald Clay Formation, and became the holotype specimen of Baryonyx walkeri, named by palaeontologists Alan J ...