REPORT OF THE DIRECTOR AND STATE GEOLOGIST 1900 rl39 



writer confidence that channels will be found on this slope to cor- 

 relate with the several levels in the Cattaraugus basin lying in 

 altitude between the Persia and the Belmore levels. Two such 

 channels can be located on the sheets; a rock gorge of consider-, 

 able dimensions occurs 3 miles south of Fredonia, having a due 

 east and west direction^ with a map altitude of 1100 feet for the 

 bottom. Other scourways, with altitude toward 1200 feet, lie 

 east of Fredonia. Northeast of Forestville a pronounced channel 

 terrace is followed by the Erie railroad. 



Peculiar forms of morainal drift 



Along a stretch of the divide north and northeast of Mayville 

 the glacial drift assumes peculiar forms. For several miles the 

 drift lies mostly in ridges, some of which are so irregular as to 

 be quickly recognized as morainal, but in some areas they are 

 so smooth or drumlinlike that the origin is not apparent. They 

 can not all be drumlins in such cases, as their directions are often 

 in two sets, at right angles to each other. 



There is a heavy moraine of typical and strong relief 2 miles 

 west of Bear lake. Westward and southwestward for some 3 

 miles the drift forms resemble drumlin ridges quite as much aa 

 they do moraine. The most peculiar feature is their attitude, 

 being often set at right angles to each other. The photographs 

 which are reproduced in pi. 40 and 41 were taken from the same 

 position, one looking west and one north, near the three corners, 

 about 5 miles due north of Mayville. Decided ridges are crossing 

 the line of vision in each of these views. The morainal character 

 is more suggestive here^ however, than in some other places. 



The smoothness of this drift can not be due to water action, 

 like moraines deposited under water, as this lies on a high portion 

 of the divide. It may be that the two sets of ridges were made 

 by the same ice edge in recession, one set being the subglacial 

 drift rubbed into drumlin form, w^hile the other set, at right 

 angles, is the true terminal moraine accumulation. 



