The triassic jurassic
The triassic-jurassic boundary is marked by a major extinction in the marine realm this event, one of the five largest extinctions during the phanerozoic eon, is especially well documented in the european alps, where there are massive losses of species of bivalves and gastropods ammonoid. How can the answer be improved.
Jurassic period: jurassic period, second of three periods of the mesozoic era, extending from 2013 million to 145 million years ago it immediately followed the triassic period (2522 million to 2013 million years ago) and was succeeded by the cretaceous period (145 million to 66 million years ago. Triassic-jurassic extinction a new study out today looks at the question of whether or not geographically widespread species are less likely to become extinct, using the triassic-jurassic boundary extinction event.
The third mass extinction event, the triassic-jurassic mass extinction, is thought to have lasted 18 million years and had many causes. Life today, the name jurassic conjures up images of the phenomenally successful book and movie, jurassic parkit is quite true that the dinosaurs dominated the land fauna — although many of the dinosaurs featured in jurassic park, such as triceratops and tyrannosaurus rex, did not evolve until after the jurassic was over. The jurassic period came after the triassic many new groups arose during the triassic period, including the dinosaurs and the first mammals extinction.
The triassic jurassic
- The triassic–jurassic extinction event marks the boundary between the triassic and jurassic periods, and is one of the major extinction events of the phanerozoic eon, profoundly affecting life on land and in the oceans.
- The triassic-jurassic boundary is similar to the permo-triassic boundary in that the global climate was not radically altered, though a major extinction of.
End-triassic extinction, also called triassic-jurassic extinction, global extinction event occurring at the end of the triassic period (252 million to 201 million years ago) that resulted in the demise of some 76 percent of all marine and terrestrial species and about 20 percent of all taxonomic families.