139 



river, a limestone appears ; not, however, in tiie form of a con- 

 glomerate, but resembling that at Pepack and Mendham, and 

 belonging evidently to Formation II. of the older secondary 

 series. Between the Lamington river and the valley of the Pe- 

 pack, this limestone is again buried under a high ridge of the 

 arenaceous sandstone, which in this neighbourhood underlies at 

 a siiort interval the calcareous conglomerate. 



Tracing the conglomerate westward, we find it next in a belt 

 separated by a space of about half a mile from the New German- 

 town tract. It commences on the Rockaway creek, a little north 

 of the road to Potterstown, and ranges near the foot of the gneiss 

 hills, for a distance of about four miles to a point a little north of 

 Lebanon, where it is intercepted by a low ridge of the gneiss. 



In aspect and composition the rock here is very similar to that 

 at New Germantown, being equally, if not more calcareous, and 

 therefore well adapted for burning into lime. It has evidently 

 been much denuded, the surface being strewed with large, irregu- 

 larly-shaped blocks. The dip, where it can be noticed, is towards 

 the northwest at a gentle angle. 



As the farmers of this belt of country along the base of the 

 gneiss hills are becoming alive to the importance of lime in agri- 

 culture, a motive is furnished them for discovering this whenever 

 it may be found; and little doubt exists that excavations will dis- 

 close it in many spots where it is now hidden by the superincum- 

 bent soil. 



Another smaller tract of this useful and curious stratum, pro- 

 tected from the general denudation, which has obviously removed 

 so large a portion of it along the base of the primary hills, exhibits 

 itself on the surface near a small stream, about two miles and a 

 half southwest of Clinton. Apparently inferior in order of strati- 

 fication is a siliceous conglomerate, met with north of the stream. 

 South of this there occurs a red shale, exhibiting considerable 

 local derangement of dip, inclining to the southeast at an angle 

 of 35°. 



Alternating with this, and apparently underlying it, lies a cal- 

 careous slaty rock, also considerably disturbed ; the prevailing 

 dip of which is also rather steep, and to the southeast. It con- 

 tains thin layers of moderately pure limestone. On the opposite 

 side of the stream and southward of the former beds only a few 



