GEOLOGY OF THE LONG LAKE QUADRANGLE 495 



from Axton to Follensby outlet is the most important one. The 

 Bog stream and Big brook stream have the same alinement. The 

 northwest direction is uncommon, though it becomes the prevail- 

 ing stream direction in the quadrangles to the northwest. But in 

 these the faulted district has been left behind, and the streams 

 seem to be consequent streams. 



GLACIATION 



Striae. The location and direction of the glacial striae noted 

 within the quadrangle limits are indicated upon the accompanying 

 map, with two additional readings just outside these limits to the 

 west. All are found by roadsides, upon recently stripped ledges. 

 But the larger number of the rock exposures elsewhere show glacial 

 rounding and polish, the striae being obliterated by the weather. 

 The fact that recently stripped exposures show them with great 

 frequency, seems to indicate that they were abundantly produced 

 within the district. Further, all seen are in valleys, and some of 

 them in valleys whose trend is at right angles to the direction of ice 

 motion. Ogilvie has urged that, in the high Adirondacks, glacia- 

 tion was comparatively feeble and mainly effective upon the hill- 

 tops, the ice in the valleys being comparatively stagnant. 1 But if 

 this be true it can only be so for a very restricted area, since the 

 Long Lake quadrangle closely adjoins the high district, and the 

 valleys show abundant evidence of considerable glaciation. 



The 10 readings on striae shown on the map vary in direction 

 from s. 2 5 w. to s. 75 w. While plainly influenced by the valley 

 trends they harmonize well with the statements of Kemp and 

 Ogilvie that the general direction of ice motion across the Adiron- 

 dack region was a southwesterly one. Six of the 10 are in harmony 

 with that statement. The other four, the two on the north shore 

 of Jenkins pond, the one by Little Simons, and one of those outside 

 the sheet, are influenced by, and have closely the trend of the val- 

 leys in which they lie. More striking instances of similar deflection 

 are shown on the Tupper Lake quadrangle, next west, where, on 

 stripped ledges along the railroad, readings of n. 8o° w. and n. 75 w. 

 were obtained, parallel to the trend of the Raquette valley. The 

 general southwest direction also holds on that quadrangle, and 

 there also striae are found numerously on recently stripped ledges. 



Glacial deposits. No heavy and thick deposits of till have been 

 noted within the quadrangle limits, nor any bulky moraines. There 



i Jour. Geol. Apr. May 1901. v. 10; N. Y. State Mus. Bui. 96, p. 470. 



