14 NEW YORK STATE MUSEUM 



A mile and one-half above on the same side of the river, due 

 north of Pyrites, is a varied display of the basal contact stuff 

 shading off into red sandstone (locality 74). Some of the rock 

 is deep blood red with large pebbles of pure white quartzite. A 

 mile farther, at the road corners on the north side of Harrison 

 creek (locality 73) a small bit of the same contact material is 

 reported by Doctor Martin. Another mile above, on the south bank 

 and protruding barrierlike across the valley (locality 72), is a 

 plicated mass of considerable thickness, chiefly of very light or 

 red sandstone somewhat microfaulted, without conglomerates, but 

 in part weak and thin-bedded. Although this area is isolated from 

 the surrounding crystallines by a valley on all sides (contouring 

 erroneous), a quartzite core appears in it as usual, consisting as 

 so frequently of the red jaspery variety, though ordinary white 

 vitreous quartzite is also present. Presumably these quartzite 

 cores have retarded glacial removal of the Potsdam patches. In 

 the western outcrops of this area the beds are pink or cream color 

 like those of the upper division. The highest dips measured, some 

 as high as 30 degrees, were in the redder layers and toward the 

 southeast, alternating repeatedly with lesser dips in the opposite 

 direction which indicate a succession of anticlines and synclines. 

 This plication seems to have resulted from compression of the 

 underlying marble belt.^ The two remaining areas (71 and one 

 not shown) outcrop off the map, as learned from Doctor Martin. 



The prolongation of this chain northeastward is covered by drift, 

 except the tiny occurrence of iron-charged contact stuff in the 

 state road gutter at the cemetery crossing east of Canton (locality 

 70). The remaining exposures lie well to the east and southeast, 

 that near the county house excepted. Old quarries in red to whitish 

 layers are located on the Bullis farm at the foot of Waterman hill 

 (83) and on the Spaulding farm (82) a mile and one-third north. 

 A mile northeast of the latter the bed of Grannis brook is on Pots- 

 dam above the mouth of Boyden brook as far as the road to Crary 

 Mills" (locality 89). The strata are much disturbed, with dips 

 in various directions, making discontinuous exposures in the bed 

 of the brook visible at low water. The chief interest in the localitv 



^ Geol. Soc. of Amer. Bui. 26, p. 292-93. 



' I am indebted to Mrs C. S. Phelps for the notes on this locaJity, which 

 had been overlooked. 



