S'I'KA'I'KJKAI'II N OF INK WAIiDWON SHAfiK. .'^99 



The genus Pisocrinus is unknown both in the Waldron and the 

 Louisville limestone and the presence of the two species P. gemmi- 

 formis and P. baccula clearly indicates that this fauna represents 

 the Laurel limestone. The Devonian limestone v^hich follows un- 

 conformably the bed containing this fauna does not contain fossils 

 at the Harris City quarry, but its lithologic peculiarities are so 

 striking as to h^ave no doubt of its identity with the same beds else- 

 where in which Devonian fossils are known to occur. The evidence 

 seems therefore conclusive that the Waldron shale and the Louis- 

 ville limestone are both absent from the Harris City section. 



At JMilroy, which is 13 miles north of Harris City, the Waldron 

 shale according to Mr. Price", is absent in the more northerly sec- 

 tions, the Devonian resting unconformably on the Laurel limestone 

 as at Harris City. A more southerly exposure in the town of Mil- 

 roy shows the shale to be present. It is probable that in the drift 

 covered region to the north of Waldron the Devonian generally 

 rests unconformably on the Laurel limestone, as at the locality just 

 noted, and terminates the extension of the Waldron shale to the 

 northward. 



The Louisville limestone separating the Waldron shale from 

 the Devonian thickens to the south until at Vernon, 16 miles south 

 of Hartsville, it has about twice the thickness shown at the Harts- 

 ville localities. The outcrop at the old tunnel near Vernon shows 

 the following section : 



Section at Old Tunnel Near Vernon, Ind. 



Feet. 



Massive dark chocolate colored magnesian limestone with saccha- 



roidal texture (Geneva limestone) 12 



Hard, gray, heavy bedded limestone (Louisville limestone) 10 to 11 



Blue calcareous sandstone 3 



Blue clay shale (Waldron) 4 to 5 



Hard, bluish, arenaceous limestone 2 



Hard, gray, thin bedded limestone 10 



The Waldron shale here contains a fauna almost if not quite 

 as rich as the one at Waldron. Other richly fossiliferous localities 

 occur to the south and southeast of Vernon along Big Creek, near 

 Paris and Dupont. East of Dupont about two miles the Waldron 

 shale reaches perhaps its maximum thickness — about'-14 feet. .At 

 Hanover on the Ohio River, which is located south and east of the 

 above-mention(Hl localities, the Waldron shale is much reduced iu 



a 24th Ann. Kept. Ind. Dept. Geol. and Nat. Res., 1900, p. 138. 



