HAWKINS, LOCKATONG FORMATION OF THE TRIASSIC 151 



Feet 



Sandy beds, green and yellow 60 



Argillite and shale, hard and red (bottom bed) 190 



Fault of 1000 feet at the top. 



10 per cent reduction made for other (undetected) faults. 



Total 2700 



ft. Scudders Falls section, Delaware River. 



Shale, dark colors, alternating at top with red shale (top bed) . . . 



Argillite, black and shaly 



Argillite, black \ T92 



Shaly beds 



Argillite, gray and red 



Shale, black, green, gray, etc. (bottom bed) 1183 



No faulting observed. 



Total 1975 



7. Princeton section. 



Shales, red, and argillite, red-brown (top bed) ^ 



Shales, gray I 792 



Shales, black j 



Argillites, gray and reddish brown 264 



Shales, gray, black and green ^ 



Argillite (a lens), 20 feet approximately I 396 



Shales, red and purple (bottom bed) 



Probably little faulting. 



Total 1452 



8. This part of the area shows occasional outcrops of gray and red argillites 



for a distance of ten miles northeast of Princeton. The northward ex- 

 tension of this series is hidden beneath the Cretaceous cover. 



The accompanying map of the Lockatong formation (Plate YII) 

 shows its actual extent, and the locations of the sections above described. 



Paleontology 



Fossil remains are far from rare in the area of the Triassic rocks. At 

 various horizons, from the bottom to the top of the series, records of 

 animal and plant life have been found. In general, these remains occur 

 scattered through the occasional strata of the rocks that possess dark 

 colors, and also often in the light-colored arkosic strata (plants) and in 

 the shales associated with the latter. Mud-cracks, ripple mark§, and the 

 footprints of animals have been repeatedly found, the latter most fre- 

 quently in red shales or sandstones. 



The Lockatong is composed essentially of rocks embracing a variety of 

 darker or lighter shades of gray, and, following the general rule, it pos- 

 sesses a considerable fossil content, particularly in those layers which are 

 darkest. The fossils become increasingly numerous and well preserved 



