213 



Following the bend of the creek on the east side some four or five 

 feet of thin bedded Laurel limestone is exposed, next to the shale, that 

 is not found at the Tarr or Turn holes. The Mobley quariy, since the 

 report on Bartholomew Count^^ was written, has developed a number of 

 irregularities of bedding not then visible. There is a slight irregularity on 

 the line dividing the lower grayish stone from the brown layers, and if 

 weathered a few more years might be classed with the Flatrock uncon- 

 formities. 



In lithologic structure and color the Louisville limestone at the Tarr 

 hole and Mobley's quarry very closely resembles the upper and equivalent 

 layers at Avery's quarry. It is probable the quarry stone at both places 

 was deposited under similar conditions, and does not show dip at Mobley's 

 because tlie quarry is not located over a marked irregularity on the sur- 

 face of the underlying Laurel limestone. Where investigations have been 

 made it has become evident that all large displays of Louisville limestone 

 are located in an erosion valley or on an anticline connected with a syn- 

 clinal axis, and that the exposure of the Louisville beds are cori-espond- 

 ingly local. 



Devonian Exposure, Cave mill Park. 



