Sentence Examples with the word jurassic period

In the Jurassic period many of the existing families, such as the Cicadidae, Fulgoridae, Aphidae, Nepidae, Reduviidae, Hydrometridae, Lygaeidae and Coreidae, had already become differentiated.

During the Jurassic period the sea began again to invade Russia from S.E.

During the Jurassic period the sea again invaded the region, both from the N.