No. If you count birds as dinosaurs, they still exist. If you don't, dinosaurs became extinct at the end of the Cretaceous, not the beginning.
The T-Rex and Triceratops. The extinction of the dinosaurs marked the end of the cretaceous period.
The dinosaurs lived in the Mesozoic Era, which includes the Triassic, Jurassic, and Cretaceous periods. The first dinosaurs appeared in the late Triassic and went extinct at the end of the Cretaceous.
Some dinosaurs that lived in the Cretaceous period include Tyrannosaurus rex, Triceratops, Velociraptor, and Ankylosaurus.
Cretaceous.
Dinosaurs died in the Cretaceous, Jurassic, and Triassic periods, but became extinct at the end of the Cretaceous.
Jurassic, Triassic, Cretaceous/The Mesozoic (all 3 in 1)
The dinosaurs were the dominant land animals during the Jurassic and Cretaceous periods, rising to dominance during the late Triassic.
dinosaurs
The cretaceous period.
The Cretaceous period.
None-avian dinosaurs first appeared in the Triassic period and were the dominant land vertebrates through the Jurassic and Cretaceous periods. At the end of the Cretaceous period, 65.5 million years ago, all non-avian dinosaurs went extinct. Birds, which are now classified as dinosaurs, continue to live to his day.
The last non avian dinosaurs lived up until the end of the Cretaceous period, specifically the Maastrichtian stage.However research in the past 20 years has show that birds are in fact dinosaurs that survive to this day.