398 



REPORT OF STATE GEOLOGIS'J'. 



The Waldron shale and its relatioos to the above nained forma- 

 tions is well shown in the following section which occurs on the 

 east bank of Flat Rock Creek II/2 miles above Geneva near the 

 original locality of the Waldron fauna: 



Section on East Bank of Flat Rock Creek 1^2 Miles Above Geneva. 



Feet. 



Chocolate colored dolomitic saccharoidal limestone (Geneva) 3 



Hard light gray limestone (Louisville) 



Waldron clay with irregular masses of limestone 5 



Hard gray limestone 1% 



The Waldron shale outcrops in the vicinity of Hartsville along 

 the three forks of Clifty Creek. It generally has a thickness of 

 about four feet and is richly fossiliferous, particularly at the Tarr 

 Hole, Anderson Falls and a small ravine % of a mile southwest of 

 Hartsville. The overlying Louisville limestone is in places very 

 thin in this vicinity, measuring less than 5 feet at some points. 



At Harris City, which is 9 miles east of Hartsville, the Waldron 

 shale and the Louisville limestone are both absent — the Devonian 

 resting upon the Laurel limestone as shown b}^ the following section 

 of the rocks in the quarry at Harris City: 



Section in Quarry at Harris City. 



Feet. 



c. Buff magnesian limestone of saccharoidal texture (Geneva lime- 

 stone) 3 to 4 



b. Hard light gray crystalline limestone with numerous crinoid 

 stems; small brachiopods not uncommon 5 



a. Hard bluish gray limestone ; fossils scarce except an occasional 



Cephalopod 15 



The fossils collected from the 5 feet of limestone underlying the 

 Geneva, b of the section, includes the following species : 



Pisocrinus gemmiformis 

 P. haccula 



Stephanocrinus n. sp. 

 Camarotechia indianensis var. 

 Atrypa reticularis 

 Uncinulus stricklandi 

 Spirifer cf. radiatus 

 8. crispa var. simplex 

 Coelospira sp. 

 Cloriiida sp. 

 / )a Ini (I Hi i es verm cosns . 



