l6 NEW YORK STATE MUSEUM 



rods along the stream with a wall of quartzose Grenville rising 

 behind; but actual outcrops are lacking. 



There remains the area (locality 69) exposed only at low water 

 in the bed of the Grass river north of Canton, as diametrically 

 opposite to that at Mr Dillabaugh's (85) in lithologic character 

 as in location, altitude and stratigraphic position. As those beds 

 are the highest in present altitude but probably the lowest strati- 

 graphically, these are the lowest in altitude but probably the highest 

 beds of the series. They are white saccharoidal sandstone, contain- 

 ing a few white quartz pebbles up to 5 inches diameter, like the first 

 described outcrops of locality 'jj. The area is cut off down stream 

 by a heavy mass of red granite-gneiss and it is hard to believe 

 that the sandstone can extend itself over this beneath the drift to 

 connect with the main belt of sandstone on the north, though this 

 may happen. 



The surprising thing about these outliers is the variability of 

 color, structure and texture in passing from one to another. It is 

 almost incredible that they can all represent a single formation. 

 The range of colors includes pure white, ashen, creamy, buff mot- 

 tled, faint pink striped, light to dark garnet red and deep wine color 

 either uniform or variously striped, bright orange-brown, dark 

 grizzled purple, light tan with violet stripes, rosy gray, hematite 

 red, and many intervening shades and combinations. The textures 

 range all the way from fine, uniform arenytes through pebble con- 

 glomerates to reconsolidated talus breccias, the medium to coarse 

 sandstone types (arenytes) being the most common. In degree of 

 induration the beds vary from rather crumbling saccharoidal rocks, 

 usually light colored or white, through excellent building stones 

 of clean fracture and great durability, usually bright colored and 

 chiefly red, to light flesh-colored white or creamy quartzites of 

 exceeding toughness and vitreous surface, and to a calico con- 

 glomerate with red jasperized matrix very difficult to distinguish 

 from the Grenville jasperite though the amorphous jasper can 

 apparently be traced directly into the ordinary red, sandy matrix 

 by perfect gradations. The conglomerates, as might be expected, 

 seldom show much stratification and the quartzitelike portions 

 appear almost wholly structureless, but the commoner sandstones 

 vary from coarsely to closely stratified or even thin-laminated and 

 generally display more or less cross-bedding or flow-and-plunge 

 structure (see figure A of plate 4). 



