what ended the triassic period
The Triassic /traÉªËaesÉªk/ traÉªËÃ¦sÉªk is a geologic period and system that extends from roughly 250 to 200 (mya.252 Â± 17.0 06 to.201 Â± 3.0 2 million years), ago an interval of.51 04 million. Years it is the first period of The Mesozoic, era and lies between The permian And jurassic. periodshe Triassic period ended with a mass extinction, which was particularly severe in the oceans; the conodonts disappeared, as did all the marine reptiles except ichthyosaurs and plesiosaurs. Invertebrates like brachiopods, gastropods, and molluscs were severely affected.