The Jurassic is a geologic period and system that extends from about  Mya (million years ago) to  Mya, that is, from the end of the Triassic to the beginning of the Cretaceous.. 
jẹ́ ará Nàìjíríààìtọ́kasí àwọn Ọjọ́ìbí níàwọn ara Nàìjíríà..