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Raritan river, which it crosses nearly opposite I^awrence's brook. 

 Its course thence is along ihis latter stream for several miles, 

 until it is interrupted by a prolongation from the ridge of trap 

 rock which passes south and east of the Sandhills. On the 

 south of this belt of trap, the sandstone is again seen near the 

 head of Heathcote's brook, from whence it takes an almost 

 westerly course to Kingston. Here its margin dellects south, 

 keeping a little to the southeast of the Raritan canal, to the head 

 of the Shipetaukin swamp, the northwestern edge of which it 

 pursues nearly to the junction of the Shipetaukin with the As- 

 sunpink, from whence to the Delaware river, a course of about 

 five miles, it follows the northwest border of the Trenton belt of 

 the primary strata. 



The northwestern border of the formation, commencing at the 

 State line, pursues for several miles the course of the Ramapo 

 river, in contact with the primary, until it is fringed by a short 

 narrow belt of the overlying calcareous conglomerate, east of 

 Pompton. From this place, its route is again along the primary 

 strata, by the base of the Pompton Mountain to Montville, where 

 it is a second time overlaid on the north, by a small tract of 

 conglomerate. 



From Montville we follow it, abutting against the primary at 

 the base of the Trowbridge Mountain, to Mendham Valley, 

 where it is interrupted for a narrow space by a belt of the 

 limestone of Formation II. of the older secondary series, which 

 it partially overlaps on its eastern side from about a mile west of 

 Mendham to Repack. From this point its course is to the 

 Lamington river, and it is for the third time covered on its 

 northern side by the calcareous conglomerate which borders it in 

 a nearly continuous belt, passing New Germantown, to a spot 

 nearly north of Lebanon, on the turnpike. Curving around the 

 base of a small hill of trap, and another of gneiss, it next skirts 

 the edge of the tract of limestone of the south branch, where its 

 range is nearly westward along the limestone, by Perryville and 

 Pattonburg. In the neighbourhood of the Old Hickory Tavern, 

 it meets the gneiss at the foot of the Musconetcong Mountain. 

 About two miles beyond that spot, about the head of Milford 

 run, it is once more, for the fourth time, bordered by the superior 

 beds of the calcareous conglomerate, lying here at the foot of 



