no SURFACE GEOLOGY. 



in height and a fourth to a half mile wide. The old muster-ground of 

 "Cork plain," in Deering, is a part of this long terrace. On the west 

 side the river has a similar but narrower alluvial margin, principally of 

 meadow or interval, not exceeding lo to 15 feet in height. At the north 

 line of Antrim and Deering these deposits have their widest development 

 upon both sides, covering a mile square. 



Kames extend along the east side of this low alluvium from opposite 

 South Antrim to the north line of Bennington. They are disposed in 

 numerous mounds and ridges, which lie mostly north and south, attain- 

 ing a height of 100 feet above the river, and occupying a third of a mile 

 in width. Their material is sandy gravel, with the largest pebbles about 

 one foot in diameter, but they contain, also, occasional angular boulders 

 of sizes up to five or six feet. Near their north end the surface of ordi- 

 nary till between these gravel ridges is strewn with massive boulders 

 often ten feet in diameter. Kames are also found a half mile south-east 

 from Hillsborough Bridge, in mounds 10 to 30 feet high. 



A very remarkabTe accumulation of sand and gravel is found on the 

 east side of this valley in Deering, two and a half miles south from Hills- 

 borough Bridge, at a height of more than 300 feet above the river. On 

 its north-west side an abrupt spur of Hedgehog hill, probably 450 feet 

 above the river, projects half-way across the valley; and the same range 

 rises still higher on the south-east. The deposit lies upon the south- 

 west slope of the intervening hollow, reaching to the height of land 

 which separates the hills. It consists of sharp-grained sand, interstrati- 

 ficd with gravel, which contains pebbles up to six inches or nearly one 

 foot in diameter. Four or five acres at the top are nearly level, and 

 thence a long slope extends down nearly to the alluvial plain. The 

 stratification of this sand and gravel is seen in gullies formed by rains 

 or very small springs, which are making slow inroads upon the level 

 area at the top, where the undisturbed strata are exposed, dipping to 

 the south-west nearly at the same angle with the slope of the hill. No 

 boulders were observed, either embedded or on the surface. This is the 

 only high deposit of modified drift close to the river in this portion of its 

 valley, and must be of different origin from our ordinary high terraces 

 and plains ; nor does any water-course exist by which it could be brought 

 here. 



