432 New York State Museum 



row bay reached from California to Wyoming early in 

 the period and later spread along the coast northward to 

 and including part of Alaska. Small areas in Mexico 

 were under water. In these waters marine deposits were 

 laid down. 



The Newark series (Redfield '56) found in New York 

 was named from exposures about Newark, New Jersey. 

 These beds are of continental origin and were deposited 

 in Upper Triassic times. Some even believe that the de- 

 position continued into early Jurassic time. In New 

 Jersey this series has been divided into three divisions, 

 two of which the Stockton beds and the Brunswick beds 

 (Kummel '97) have been recognized in Rockland county. 

 Three diabase areas outcrop in these beds, the Palisade 

 diabase, which represents a great sill or sheet of igneous 

 rock intruded near the close of the period, forming the 

 Palisades of the Hudson. The Newark series has a 

 thickness of 10,000 to 15,000 feet. Surfaces are marked 

 with sun cracks, raindrop pits, ripple marks and remains 

 and footprints of land reptiles, all features indicating 

 deposition in very shallow water, flood plains, lakes etc. 

 Remains of small dinosaurs have been found in Triassic 

 rocks of the east, and recently a specimen was found in 

 the Newark beds along the lower Hudson. 



Jurassic Period 



Rocks of this period do not occur in New York State. 

 The area during this period was undergoing erosion so 

 that by the end of the period this region and the entire 

 Atlantic slope had been worn down practically to pene- 

 plane conditions. Indeed, there was extensive erosion 

 throughout eastern United States during the Jurassic, as 



