Definitions for Cretaceous
This dictionary definitions page includes all the possible meanings, example usage and translations of the word Cretaceous.
Cretaceous, Cretaceous periodadjective
from 135 million to 63 million years ago; end of the age of reptiles; appearance of modern insects and flowering plants
abounding in chalk
of or relating to or denoting the third period of the Mesozoic era
The geologic period within the Mesozoic era that comprises lower and upper epochs from about 146 to 65 million years ago
Of or relating to chalk.
Consisting of chalk.
Samuel Johnson's Dictionary
Abounding with chalk; having the qualities of chalk; chalky.
Etymology: creta, chalk, Lat.
What gives the light, seems hard to say; whether it be the cretaceous salt, the nitrous salt, or some igneous particles. Nehemiah Grew.
Nor from the fable ground expect success,
Nor from cretaceous, stubborn and jejune. Philips.
The Cretaceous ( krih-TAY-shəs) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of the entire Phanerozoic. The name is derived from the Latin creta, "chalk", which is abundant in the latter half of the period. It is usually abbreviated K, for its German translation Kreide. 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 ice free, and forests extended to the poles. During this time, new groups of mammals and birds appeared. During the Early Cretaceous, flowering plants appeared and began to rapidly diversify, becoming the dominant group of plants across the Earth by the end of the Cretaceous, coincident with the decline and extinction of previously widespread gymnosperm groups. The Cretaceous (along with the Mesozoic) ended with the Cretaceous–Paleogene extinction event, a large mass extinction in which many groups, including non-avian dinosaurs, pterosaurs, and large marine reptiles, died out. The end of the Cretaceous is defined by the abrupt Cretaceous–Paleogene boundary (K–Pg boundary), a geologic signature associated with the mass extinction that lies between the Mesozoic and Cenozoic Eras.
The Cretaceous is a geologic period and system that spans 79 million years from the end of the Jurassic Period 145 million years ago to the beginning of the Paleogene Period 66 million years ago. It is the last period of the Mesozoic Era and is famous for being the time of the dinosaurs. The name Cretaceous comes from the Latin word "creta" which means chalk, referring to the chalky composition of much of the sedimentary rocks from this period.
having the qualities of chalk; abounding with chalk; chalky; as, cretaceous rocks and formations. See Chalk
Etymology: [L. cretaceus, fr. creta chalk. See Crayon.]
The Cretaceous, derived from the Latin "creta", usually abbreviated K for its German translation Kreide, is a geologic period and system from circa 145 ± 4 to 66 million years ago. In the geologic timescale, the Cretaceous follows the Jurassic period and is followed by the Paleogene period of the Cenozoic era. It is the last period of the Mesozoic Era, and, spanning 79 million years, the longest period of the Phanerozoic Eon. The Cretaceous was a period with a relatively warm climate, resulting in high eustatic sea levels and creating 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. At the same time, new groups of mammals and birds, as well as flowering plants, appeared. The Cretaceous ended with a large mass extinction, the Cretaceous–Paleogene extinction event, in which many groups, including non-avian dinosaurs, pterosaurs and large marine reptiles, died out. The end of the Cretaceous is defined by the K–Pg boundary, a geologic signature associated with the mass extinction which lies between the Mesozoic and Cenozoic Eras.
Chambers 20th Century Dictionary
krē-tā′shus, adj. composed of or like chalk.—adj. Crē′tāted, rubbed with chalk.—n. Cretifac′tion.—v.i. Crē′tify, to become impregnated with salts of lime. [L. cretaceus, from creta, chalk.]
chalky white: the third, uppermost and latest of the three great divisions of the mesozoic or secondary rocks.
The numerical value of Cretaceous in Chaldean Numerology is: 3
The numerical value of Cretaceous in Pythagorean Numerology is: 2
It indicates that psychedelic compounds were present back in the Cretaceous, what effect it had on animals is difficult to tell, but my feeling is dinosaurs definitely fed on this grass.
Gualicho would likely not have been something you'd want to meet on a lonely, dark Cretaceous night, with Mapusaurus probably preying on large sauropods (the group that included Argentinosaurus), Gualicho likely focused on smaller prey: a category a human lost in the Cretaceous would fit into.
Grasses probably go back to the Early Cretaceous Period and possibly even the Jurassic Period.
Data collection concerning end-Cretaceous dinosaurs happened to start at about the same time in both Europe and North America – around the middle of the 19th century, it is only by chance (a combination between mainly better rock availability and more human effort poured into this line of research) that the North American fossil record grew more rapidly and soon become the best one in the world for that particular time period. As such, it captured attention and was used as a template to understand end-Cretaceous extinction. The data was harder to gather in other continents, including Europe, and the resolution of the European fossil record is still far from that coming from North America. But its growth is spectacular (we know probably twice as much about late Cretaceous fossil vertebrates from Europe then we knew like 20 years ago), and that is due to the activity of a large number of mainly young researchers working all across Europe.
But that fact allows us to use computer simulations to tease out the history of Saturn’s inner moons, doing so, we find that they were most likely born during the most recent 2 percent of the planet’s history. Related : Saturn's largest moon Titan is bursting with color Researchers had long thought Saturn’s rings were as old as the planet itself. But that thinking changed in 2012, when French astronomers found that tidal effects – the gravitational interaction of the inner moons with fluids deep in Saturn’s interior – are causing them to spiral to larger orbital radii comparatively quickly. The implication, given their present positions, is that these moons, and presumably the rings, are not so old. That still did n’t answer exactly when they were born. Cuk and his team turned to results from NASA’s Cassini mission, which has observed ice geysers on Saturn’s moon Enceladus. Assuming that the energy powering these geysers comes directly from tidal interactions and that Enceladus ’ level of geothermal activity is more or less constant, then the tides within Saturn are quite strong. According to the team’s analysis, these would move the satellite by the small amount indicated by the simulations in only about 100 million years. Related : Cassini probe takes' cosmic bulls-eye' of Saturn moons Enceladus, Tethys This would date the formation of the major moons of Saturn, with the exception of more distant Titan and Iapetus, to the relatively recent Cretaceous Period, the era of the dinosaurs.
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"Cretaceous." Definitions.net. STANDS4 LLC, 2023. Web. 7 Dec. 2023. <https://www.definitions.net/definition/Cretaceous>.