210 



Waldroii shale, but nothing worthy the name of an unconfoi'mity 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 

 ilhisTrated by ^Messrs. .T. A. Price and K. 'SI. Kindle in later reports. 



Avery t^uKiTv. .■^oullieust Ciinier. 



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 conformably (in the ^^'aldron. 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 three degrees. On the south face of 

 the iiuarry. 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 before reaching the 

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

 layer which is continuous around tht*" south and east faces of the quarry. 

 From e^i. inches at the southw^est end it gradually diminishes to 2^^ inches 

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

 meastires 11 inches at the north end: it soon divides into two lavers. whose 



