Jurassic, Jurassic period(adj)
from 190 million to 135 million years ago; dinosaurs; conifers
of or relating to or denoting the second period of the Mesozoic era
Of the age of the middle Mesozoic, about 190 to 140 million years ago, including, as divided in England and Europe, the Lias, O
Of or pertaining to the second period of the Mesozoic era, a time still dominated by dinosaurs.
Of or pertaining to the people or region near the Jura Mountain Range of Europe.
The period from 200 to 146 million years ago, after the Triassic and before the Cretaceous; the geologic formations of this period.
Origin: Named for the discovery and type location in the Jura Mountains of Switzerland.
of the age of the middle Mesozoic, including, as divided in England and Europe, the Lias, Oolite, and Wealden; -- named from certain rocks of the Jura mountains
the Jurassic period or formation; -- called also the Jura
The Jurassic is a geologic period and system that extends from 201.3± 0.6 Ma to 145± 4 Ma; that is, from the end of the Triassic to the beginning of the Cretaceous. The Jurassic constitutes the middle period of the Mesozoic Era, also known as the Age of Reptiles. The start of the period is marked by the major Triassic–Jurassic extinction event. Another extinction event, the Late Piensbachian/Early Toarcian event, occurred in the Early Jurassic, and a third extinction event, the Late Tithonian event, occurred at the end of the Jurassic; however neither of these two events rank among the 'Big Five' mass extinction. The Jurassic is named after the Jura Mountains within the European Alps, where limestone strata from the period was first identified. By the beginning of the Jurassic, the supercontinent Pangaea had begun rifting into two landmasses, Laurasia to the north and Gondwana to the south. This created more coastlines and shifted the continental climate from dry to humid, and many of the arid deserts of the Triassic were replaced by lush rainforests. On land, the fauna transitioned from the Triassic fauna, dominated by both dinosauromorph and crocodilomorph archosaurs, to one dominated by dinosaurs. The first birds also appeared during the Jurassic, having evolved from a branch of theropod dinosaurs. Other major events include the appearance of the earliest lizards, and the evolution of therian mammals, including primitive placentals. Crocodylians made the transition from a terrestrial to an aquatic mode of life. The oceans were inhabited by marine reptiles such as ichthyosaurs and plesiosaurs, while pterosaurs were the dominant flying vertebrates.
Chambers 20th Century Dictionary
jōō-ras′sik, adj. (geol.) one of the three divisions of the Mesozoic rocks, including the Lias and Oolites, and so called from its well-developed strata in the Jura Mountains.
The numerical value of Jurassic in Chaldean Numerology is: 2
The numerical value of Jurassic in Pythagorean Numerology is: 1
Examples of Jurassic in a Sentence
Grasses probably go back to the Early Cretaceous Period and possibly even the Jurassic Period.
Although we have found dense internal structures that we have interpreted as nuclei in our cells, and the cells we found appear to preserve original components of blood, there is no evidence of any organelles or DNA within the nuclei, but even if one was to find some fragments of DNA, we would not be able to reconstruct a dinosaur 'Jurassic Park-style' because we would need the complete genome to figure out where the holes in the DNA are.
I always say, it's sort of like Jurassic Park with a happy ending, we knew that if we didn't do something, maybe my grandchildren would never have the opportunity to see these incredible animals.
When we see dinosaurs in popular culture, such as in Jurassic Park, we see them depicted with big teeth sticking out of their mouths.
We know this dinosaur is (was born) 200 million years ago, to within half a million years or so, the rocks down here we've been studying for quite a long time now and we can do direct comparisons with the ages of rocks in Austria, which is where the transition between the Triassic and the Jurassic boundaries is precisely located.
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