222 A. W. G. WILSON — TRENT RIVER SYSTEM 



The direction of movement of the ice-sheet which produced the stria- 

 tions on the uplands was to the west of southwest in Ontario. In New 

 York and in the vicinity of the Thousand islands it is a little more 

 southerly, the stria? running about south 65 degrees west, true. That 

 this westerly direction, as shown by the striae, is the general direction of 

 the ice movement is also shown by the direction of the longer axes of 

 the very numerous and large drumlins in Huntingdon township, North 

 Hastings (county), and elsewhere. The direction of the general move- 

 ment of the ice on the uplands was quite independent of the trend of the 

 valleys. In some cases it has been parallel to them, in others across 

 them or at various angles to their axial lines. In one locality, near the 

 head of Mill creek, stria? are found crossing obliquely downward into 

 the valley from the northeast. At this locality the valley sides are steep 

 cliffs and at one point the ice in its descent into the valley appears to 

 have broken away a short piece of the crest of the cliff, producing a re- 

 markably smooth curved surface at the very edge. Near the same local- 

 ity, in the bottom of the valley about midway between the walls, stria? 

 are found parallel to the valley sides and thus oblique to the general 

 direction of ice movement, showing that here at least there was a local 

 differential movement of the ice sheet, assuming that these striae, which 

 are but a few hundred yards apart, are of contemporaneous origin. 



In another locality, just west of the town of Napanee, a cliff on the 

 southeast side of the valley of the Napanee river is scoured from base to 

 summit, a height of about 125 feet, although upstream above and down- 

 stream below the scoured area the same cliff shows no well marked 

 traces of glacial erosion. There is a slight turn in the direction of the 

 cliff line at the locality in question, and it is this fact that probably led 

 to the unusual amount of scouring at this place. 



Again, on the north side of the American channel of the Saint Law- 

 rence river, about a mile and a half below Carleton island, there are a 

 number of places where, in passing down into the valley, the ice has cut 

 deeply into the cliff crest of the ancient and now submerged valley side, 

 producing deep grooves or channels. One of these, a type of them all, 

 is about 25 feet across, about 5 feet deep at the lowest point of the curved 

 or rounded bottom. The angles where the curve of the bottom inter- 

 sects the striated flat surface of the adjacent parts of the cliff on either 

 side is distinct and clear. The block that carved this channel was 

 moved down into the valley parallel to the direction of the general 

 movement of the ice in the locality, as shown by the numerous stria? 

 on the flat surfaces elsewhere in the neighborhood. It entered the val- 

 ley in a direction making an angle of about 45 degrees with its axial 

 direction. 



