Flint Ridge Section. 



77 



the action of the torrents and wintry frosts, into a grotto of considera- 

 ble size, called the " wild cat's den," from the fact of one or two of 

 those animals having been killed here in early days. It will serve as 

 a landmark for others who may wish to visit the place. From this 

 spot I followed down the deep ravine of the run, a considerable dis- 

 tance, as far as 1 could conveniently go, the sides of which were 

 very abrupt and gave quite a satisfactory view of the stratification. 

 My examination ended with a deposit of yellow Ochre, in the bed 

 of the run, which I shall make the first step in the section. 



Section of Mock Strata at Flint Ridge. — Order ascending. 



Fiff. 14. 



Bed of run or branch. 



1. Argillaceous, slaty earth, resembling ochre in appearance ; col- 

 or, pale yellow ; forming the bed of the run ; depth, unknown. 



2. Resting on the ochre, lies a deposit of slaty, light grey, sand- 

 stone, containing considerable white mica in fine scales ; easily 

 crumbling and decomposing when exposed to the weather, — 8 feet. 



3. Bituminous shale ; below, with traces of coal ; upper part of 

 the bed, dark clay slate, considerably compact in places. The su- 

 perior portion of the deposit, very fissile and highly calcareous, near- 

 ly black ; containing numerous specimens of fossil shells, generally 

 small terebratulse and the upper or flat valve of the Productus, No. 

 12, figured on plate 2, Vol. 29 of this Journal. Many of these 

 shells still retain the cuticle. — 10 feet. 



4. Light gray compact limestone ; in some places mixed with 

 silex ; breaking into irregular conchoidal masses and containing or- 



