Ri HENRY B. KUMMEL 
beds south of Clinton belong in the Stockton series. Both the 
calcareous and quartzite conglomerates near Pottersville and 
Peapack belong with the Brunswick beds. 
It must be understood that what has been said concerning 
the above conglomerates does not apply to the conglomerate 
layers interbedded with shales and sandstones, which occur 
either along the southeastern part of the formation, near Hope- 
well or near Stockton. The latter are comparatively thin beds 
of little importance from a topographical standpoint, and belong 
to the Stockton series. They present no features of particular 
interest. 
Thickness of the Newark sedimentary beds.— All estimates of 
the thickness of these sedimentary rocks contain an element of 
uncertainty. This arises from the monotonous character of the 
beds and the difficulty of detecting and measuring the faults. 
In addition to several very large dislocations which have been 
located accurately, a number of smaller fractures have been 
observed in quarries, railroad cuts, stream bluffs, and other 
exposures. Most of these could not be traced beyond the point 
of exposure. After making all possible allowance for known 
faults, 1 am compelled to admit that the facts in hand indicate a 
vastly greater thickness than has usually been supposed. 
The thickness of the Stockton beds between Trenton and 
Wilburtha seems to be 2300 feet. No estimates can be made in 
the area near Hopewell, since only the upper part of the series, 
650 feet or so, is there exposed. At Brookville below Stockton 
the base of the formation is brought to the surface by a fault and 
the thickness seems to be 4700 feet. No positive evidence of a 
fault could be found within this area to account for the greater 
thickness as compared with the belt near Trenton, whereas there 
is slight evidence that the whole series is not found near the 
latter place. 
The thickness of the Lockatong beds is best shown on Hun- 
terdon plateau. Here the upper and lower limits can be care- 
fully located. The dip is more than ordinarily uniform and 
outcrops are sufficiently numerous to prevent any great error in 
