MAIN MORAINIC SYSTEM OF THE SCIOTO LOBE. 413 



In a sewer excavation on Pickaway street, between Franklin and 

 Mound streets, the following section was obtained: 



Section in a sewer ditch in Gircleville^ Ohio. 



Feet. 



1. Claj' and clayey gravel of dark-brown color 2^-3 



2. Gravel, horizontally bedded, containing many cobblestones, but in places composed only of fine 



sand 4_g 



3. Yellow till, with streaks of blue till, the whole being calcareous from the very top, showing 



either that leaching had not occurred before the deposition of gravel, or that the calcareous 

 element was restored ,5_g 



4. Blue till exposed near bottom of sewer _ i_2 



In the till there are many small pockets of fine gravel. They are elon- 

 gated horizontally, though they do not he jierfectly horizontal, their inclina- 

 tion beuig in some cases as great as 25°. The pebbles in the till and also 

 in the overlying gravel are mainly limestone. The gravel deposits capping 

 the till are probably of the same age as the morainic hills east and north of 

 the city, while the till may be slightly older. Its calcareousness at surface 

 indicates either that no great amount of leaching had taken place before the 

 gravel was deposited on it, or that, leaching having occurred, calcareous 

 material was restored to it from the overlying calcareous gravels, or possibly 

 the glacial stream that deposited the gravel. 



In a gravel pit in a morainic knoll one-half mile north of Circleville, 

 some pebbles were collected and classified with the following results. The 

 size determined upon included only pebbles an inch or less in diameter: 



Pebbles in a gravel pit near Circleville., Ohio. 



Limestone 126 



Shale _ 6 



Quartz 1 



Chert 5 



Granite - , 4 



Other Archean pebbles 4 



Total 1^ 



The pebbles are nearly all rounded and show no striae. Man}- nodules 

 of clay, ironstone, and fragments of shale several inches in diameter occur 

 in the pit. They are probabl}^ of Devonian age. There are cobblestones 

 and bowlderets of limestone up to a foot in diameter. The stratification is 

 nearly horizontal, but is subject to occasional abrupt departures from the 

 horizontal. 



In a morainic tract west of Kingston a sharp ridge with north-south 



