308 STRATIGRAPHICAL GEOLOGY. 



previously described fragment of conglomerate, whose course was said to 

 be about east and west. By examining the map it may be seen that this 

 fragment will nearly fill the vacant space existing between the east-west 

 range and a smaller one to the west between P — 18 and 19. The north- 

 ern end of this fragment must have been thrown 450, and the southern 

 end 900 feet ; and its very great width suggests the accumulation of bulk 

 by folding up the original sheet. Perhaps for the whole of the distance 

 the mass has been pushed horizontally. The lower fragment near P — 18 

 is only 350 feet long, running a few degrees north of east. The dip is 

 70° northerly. Between this and the ledge next J. Williams's house, a 

 distance of 3650 feet, the rock is clay slate, rather more friable than 

 usual, and is believed to cover up the conglomerate. The ledge at Wil- 

 liams's is 200 feet long, dipping 80° S. 35° E., rising precipitously twenty 

 feet above the road. It is known to be auriferous, by assays. 



In the valley of Smith brook the rocks have been deeply excavated and 

 covered with sand, so that for a distance of 800 feet no ledges are discern- 

 ible. We then find a large conglomeratic mass having the shape of the 

 letter L, the upright part being 800 and the horizontal 550 feet long. 

 The upright part is in the same line with the two previously mentioned 

 exposures, and the other runs S. 35° E. The country is w^ooded, and 

 hence the ledge cannot readily exhibit its shape, as it does elsewhere, 

 rising like a rampart above the adjacent land, not forming the crest of 

 the hill, however. The western and northern walls are the most promi- 

 nent, rising perpendicularly twenty-five feet for several rods. The north- 

 ern slope is covered by enormous blocks of stone separated by frost from 

 the ledges, and then fallen a short distance down hill. 



The connection between the next conglomerate masses is not under- 

 stood. We have first a fragment 500 feet from the end of the L running 

 N. 35° E., save that the northern end is bent towards the greater mass to 

 the east. It is 400 feet long. The larger fragment is conical in shape, 

 when viewed horizontally, or as projected upon the map, the longer diam- 

 eter being 500 feet and the base 400. The base is at the foot of a preci- 

 pice, say 150 feet high. Near the upper part excavations have been made 

 into the ledge in search of gold, and it was known formerly as the " Dow 

 mine." The aspect of the fragment oftentimes seems like that of an 

 anticlinal plunging beneath the hill, with a cap of dolomite. There is 



