THE RARITAN FORMATION. 



17 



J^'^ I. — Diagram Showing the sequence and relative thickness of the Geological 



divisions in New Jersey. 



of the strata of the Raritan formation, and could the duration 

 of geological time which lias gone before it be expressed in 

 years, we would obtain a still more vivid pictiu-e of the compara- 

 tive youth of the Cretaceous period, even though this is offset 

 with the reflection that the Cretaceoms is removed several mil- 

 lion yeai-s from the present, and the plants described in the fol- 

 lowing pages antedate all of the higher animals, and were the 



