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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.
The Cretaceous Thermal Maximum (CTM), also known as Cretaceous Thermal Optimum, was a period of climatic warming that reached its peak approximately 90 million years ago (90 Ma) during the Turonian age of the Late Cretaceous epoch. The CTM is notable for its dramatic increase in global temperatures characterized by high carbon dioxide levels.
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.
During the later portion of the Cretaceous, from , average global temperatures reached their highest level during the last ~200 million years. [6] This is likely to be the result of a favorable configuration of the continents during this period that allowed for improved circulation in the oceans and discouraged the formation of large scale ice ...
During the Late Cretaceous, the climate was warmer than present, although throughout the period a cooling trend is evident. [4] The tropics became restricted to equatorial regions and northern latitudes experienced markedly more seasonal climatic conditions.
Cretaceous–Paleogene boundary and Cretaceous–Paleogene extinction event, extinction of non-avian 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
Adults of this pterosaur, whose scientific name means "cold dragon of the north wind" in reference to Alberta's chilly modern-day climate, had wingspans of about 33 feet (10 meters) and stood as ...
The South Polar region of the Cretaceous comprised the continent of East Gondwana–modern day Australia, Zealandia, and Antarctica–a product of the break-up of Gondwana in the Cretaceous Period. The southern region, during this time, was much warmer than it is today, ranging from perhaps 4–8 °C (39–46 °F) in the latest Cretaceous ...