210 



Waldron shale, but nothing worthy the name of an unconformity until Mr. 

 Foerste, in the twenty-second Indiana Geological Report, called attention 

 to the Avery quarry as showing evidence of a period of erosion. Other 

 unconformities on Flatrock and Conn's creeks have been described and 

 illustrated by Messrs. .T. A. Price and E. M. Kindle in later reports. 



Avt'i y (juairy. Southeast Corner. 



The Avery quarry is located on the east bank of Conn's Creek, one 

 mile south of Waldron. The Louisville limestone, as the workable bed of 

 stone has been called, rests confornial)ly on the Waldron. is 10 feet thick 

 on the north wall and five feet thick in the southeast corner. The layers 

 have a general dip to the north of thi-ee degrees. On the south face of 

 the quarry, near the southeast corner, three discontinuous layers are ex- 

 posed at the top of the Louisville limestone. They aggregate nine inches 

 in thickness at the west end. and thin to nothing Ijefore reaching the 

 southeast corner. Immediately under the attenuated strata is a 6%-inch 

 layer which is continuous around tlie south and east faces of the quarry. 

 From Gtl, inches at the southwest end it gradually diminishes to 2% inches 

 at the northeast corner. Below the continuous layer is a layer which 

 measures 11 inches at the north end; it soon divides into two layers, whose 



