Geology of Seneca County. 107 



Peblles of limestone generally disappear from the decalcified 

 part. 



The channel of a rivulet, 15 feet deep, occurs at this place, 

 bringing the section to an end. The oxidation changes follow 

 the slope down; the physical changes and the reaction-point 

 keeping at the same distance as usual from the surface. 



The lamination of the lower or '* blue " clay is often marked 

 by delicate folia of the finest sand ; by alternations of chocolate, 

 brownish and bluish tints; and by a beautiful alternation of 

 shades from brick red to cream color in the clay when burnt 

 without kneading. By selecting the proper layers of " blue clay '* 

 a cream-colored brick of great hardness and good appearance has 

 been produced at Geneva. It is worth while to ascertain whether 

 such material can be used for making ornamental pottery. 



A peculiar section was shown at Seneca Falls in excavating for 

 the cellar of the new hotel, about 440 feet A. T., in 1894. Total 

 thickness, 6-7 feet. 



1. Loose top-soil, moderate depth. 



2. A whitish clayey layer. 



3. Chocolate-colored clay in places, not laminated. 



4. A whiter clay with distinct lamination. 



5. For the lower foot or two the material resembled disinte- 

 grated till, being composed of sand, gravel and stones, many of 

 , which have the characteristic shape and striations of till-stone. 



Too little compact for till, and not considered as " hard-pan " by 

 the diggers. 



At Thomas' quarry, south of "Waterloo village, two sections of 

 clay, etc., upon the limestone knoll, 50 feet (?) above the level of 

 Seneca river and lake. (1) Till, 5 feet ; red clay, handsome and 

 well stratified, 18 inches ; tawny fine sand, 6 feet. (2) Till 

 absent; darkish, purplish clay, interlaminated with blue, 16 

 inches ; red clay, 30 inches. 



The clay at Willour and Pontius' tilery, five miles south of 

 "Waterloo, is classed with the other clays of the red belt. It lies 

 in the valley of Kendig's creek ; at 100+ feet above Seneca lake. 



Rorison's quarry, two miles south of Seneca Falls, is covered 

 with 30 inches of the red upper clay. 



