Extra- Mo ixiuiiG Drift in New Jersey. — Wright. 211 
On Scott's mountain, commencing three miles south of Rox- 
burgh, for a distance of one mile, at 720 feet. 
The water in the Delaware river has an elevation at Belvidere 
of 229 feet; at Phillipsburg and Easton 156 feet; at Riegelsville, 
at the lower end of Musconetcong mountain, 129 feet. 
These figures are sufficient to show that the deposits in ques- 
tion cannot be attributed to the agency of streams, flowing from 
the glaciated regions lying northward, but on the contrary, must 
be due, as h?s been urged, to an ice-sheet upon the land. 
The lithological and stratigraphical composition of the deposits, 
especially, proves them to be glacial. 1 scarcely know where to 
point for finer examples of genuine glacial deposits, than to those 
at Little York, Oxford Furnace, and the two cuts north of Wash- 
ington, the latter of which are five miles south of the moraine. 
At Oxford Furnace, for example, where the exposure is from ten 
to twenty feet thick, there is the greatest variety of pebbles and 
bowlders, drawn from every source, and of various sizes and 
shapes, imbedded heterogeneously in a matrix of sand and clay. 
The predominating bowlders are of gneiss from the hills close at 
hand. All of these are angular in shape. Some of them show 
wavy, green epidotic stripes; some have rusty, ferruginous 
stripes; while others carry free quartz containing tourmaline 
crystals, like specimens quarried from the Oxford t^inel. Mag- 
nesian limestone also crops out, in place, here; and fragments of 
it, completely scored on every side, were imbedded in the till. 
There were also fragments of linionite ore; black flint, probably 
from the limestone ; angular fragments of shale and slate, both 
striated and unstriated. But besides these elements, of local 
origin, one is able in a few moments, to take samples of manj' 
other rocks from far away, such as coarse granite, with large, 
pink orthoclase crystals; milky quartz, perhaps from the slate 
regions to the north; Medina sandstones or quartzites from the 
north, the dark gray, red and purplish varieties, as well as the 
more characteristic whitish variety, whose surface tans to such a 
beautiful, smooth leather color; Oneida conglomerate, a bowlder 
2x2x6 feet, brought all the way from Kittatinny mountain, at 
least, its corners well rounded, as is the case with most of the 
northern material. Fragments of leached and spongy sandstone, 
perhaps feldspathic, are also found, while all are mixed in the 
fine confusion that demonstrates tlieir deposition by an ice sheet. 
