82 JOURNAL OF THP: 



saod. Towards the western limit the sand becomes coarser, and 

 near the western border will be found the patches of coarse pebbles. 

 The elevated patches occurring in Wake, Harnett and Moore coun- 

 ties, as well af those along the banks of Cape Fear below Fayette- 

 ville, have been mentioned already. As exposed at other places 

 these deposits consist of a light colored and yellowish consolidated 

 marlyte, as in the steep bluffs on the N^^use, 10 miles below Golds- 

 boro, and again 15 to 20 feet thick, 10 miles above New Berne, and 

 in the natural wells near Magnolia, containing in this form 40 to 80 

 per cent, of carbonate o: lime; or of a shell conglomerate as seen 

 about New Berne and 8 or 10 miles up the Trent river^ — a rock much 

 used for building in New Berne, and burned for lime, while in some 

 limited localities it is made up of siliceous casts of shells from which 

 all the carbonate of lime has been dissolved, constituting a true 

 bushstone ; or of a white calcareous sandstone more or less com- 

 pacted, as on the Neuse, near Goldsboro. and near the railroad 

 through Duplin and Sampson counties, and in Onslow and Jon^s, 

 on the Trent, and along the North East river for the most part of 

 its course to within a mile of Wilmington ; or of a gray and hard 

 limestone, as about Richlands, in Onslow, at Rocky Point, 20 miles 

 north of Wilmington, and 7 miles north, on the North East river; or 

 of a coarse conglomerate of worn siiells, shark's teeth and fragments 

 of bones and stony pebbles, as in the upper part of Wilmington and 

 at Rocky Point; or of a fine shaly infusorial clay, light gray to ash 

 colored, as in Sampson county, near Faison's depot. (Geology of 

 N. C, 1874, pp. 146 and 150). 



In the limestone rock occurring at Rocky Point and Castle Hayne, 

 there is to be found, a few feet below the surface, irregular layers 

 (somewhat in pockets) of gray limestone conglomerate, from to 

 3 feet (and even 4 or 5 feet at the latter) in thickness, from i to i 

 and even ^ of the rock being made up of black, greenish or gray 

 irregularly rounded phosphatic pebbles, varying in size from quite 

 small to 1 and 3 inches in diameter. It is probable that, at least 

 in some cases, the larger, irregular perforated masses of phosphate 

 rock weighing from 2 to 50 pounds, recently discovered in Duplin 

 and Sampson counties,* also belong to the eocene, but the exact 

 age of these is yet undetermined. 



The acceptance of the conclusion adopted in this paper, that the 



*SeeDabney, C. W.— This journal, 1883-84. pp. 64, 68. 

 Rept. of N. C. Agr. Ex. Sta., 1884, pp. 44, 89. 



Phillips, W. B. North Carolina Phosphates; Sept., 1883, pp. 19, and this 

 journal, i883-'84, pp. 60, 63. 



