DELAWARE COCINTY. 301 



No. 1. Bedded 3 to 6 inches, light-colored, persistent, and overhang- 

 ing; crinoidal 6 ft. 



" 2. Massive, crumbling, light-colored 6 " 



Total '. 12 " 



After an interval of about fifty rods the Upper Corniferous returns ; 

 but a mile and a half still further down the crinoidal beds reappear in 

 the right bank of the river. They are seen in the public road, and 

 have been opened a little by quarrying. 



Oriskany Sandstone.— In Delaware county the Oriskany is much reduced 

 in thickness from what it is in the northern part of the State, but its com- 

 position is much coarser, reaching that of a real conglomerate. It is not 

 over two feet at any point where it has been seen. The pebbles embraced 

 in it are entirely of the Waterlime, and uniformly rounded as by water 

 action. Some are four inches in diameter, but in thin pieces. The last 

 section given (that on Mill Creek) shows its position in the strata. It 

 is there plainly exposed, and fades out, without change of bedding, into 

 the lowest part of the Lower Corniferous, which sometimes, as in the 

 county of Sandusky, has been seen to be somewhat arenaceous several 

 feet above the strong arenaceous composition of the Oriskany. The ex- 

 posure on Mill Creek, and that in the left bank of the Scioto near" the 

 lime-kiln of Mrs. Evans, are the only points in the county at which 

 this conglomerate has been seen. 



Waterlime. — As already mentioned, the Waterlime appears in the left 

 bank of the Scioto, near Mrs. Evans's lime-kiln, a quarter of a mile 

 below Millville, and has been somewhat used for quicklime. It rises 

 here fifteen feet above the water of the river at summer stage. It is 

 probable that the bed of the river is on the Waterlime for a mile below 

 this point, and even to Sulphur Spring Station. 



The quarry of John Weaver, about half a mile below Cone's Mill, is 

 in the Waterlime. The exposure is here in a ravine tributary to the 

 Scioto from the west. The situation is favorable for profitable quarrying 

 and lime-burning. The stone is drab, and much shattered. It turns a 

 light buff after weathering, some of it becoming as white as chalk. 



Half a mile above Millville the Waterlime rises m the right bank of 

 the Scioto about fifteen feet, the road passing over it. It is visible in 

 the bed of the Scioto at the crossing known as the Broad Ford. At 

 Cone's mill is a fine surface exposure of the Waterlime. It has been 

 somewhat wrought at this place. The beds are quite thin and slaty, 

 and of a blue color. The texture is close and the grain very fine. In 

 the bed of the Scioto a stone spotted with drab and blue is quarried a 

 short distance below Middletown. It is in even beds of four to eight or 



