155 



Dp:vonian of SorTHKKN Indiana 



These Sellersbur<j- beds are entirely wanting" liere. 



The Devonian limestone of the above se(5lion proi^abl}^ does not 

 exceed two feet in thickness. It afforded- the follo\vin<^ fossils: 



Sfation 2jA. — Brooks Run. 



AFlinopteria sp., Atrypa reticularis a, CamaroUrchia sp., Liclw- 

 nalia sp., Orthis vanuxemi r, Pcntamcrclla arata r, Phacops rana, 

 Plaiyccras sp. , Platyostoma lincatuvi c, ProduBella spiniilicosta r, 

 Proctus crassiniarginahis c, Riiipidomella livia r, Spirifer divari- 

 catus r, Spirifer Jimbriatus r, Spirifer fornaculus r, Spirifervari- 

 cosusx, Stroplieodonta demissa r, Stroplieodonta perplana. 



The unconformity of the Black shale and the underlying lime- 

 stones is well shown in a sedlion exposed in the railroad cut a 

 quarter of a mile south of Huber station. The shale on one side 

 of the section here is separated from the limestone by about four 

 inches of red clay. 



The accompanying figure (Fig. 2) illustrates the relations ob- 

 .served between the shale and the limestone at this point. 



FIG. 2. — ScLlion shoiving t/ie unconforinity of tlic Black shale and llie De- 

 vonian liinestone. 



A. Devonian limestone. 



B. Red clay. 



C. Black shale. • 



The limestone ju.st under the black shale in this .se(5lion af- 

 forded the following species: 



Station 26B. — Huber, Ky. 



Amboccelia utnbonata a, Camarotccchia tethys c, Orthis sp., 

 Platyceras s^., Spirifer davisif r, Spirifer fiinhriatus r, Spirifer 

 segvientus r, Spirifer varicosiis r, Tropidoleptiis caritiatus r. 



