290 



Clara Gould Mark 



THICKNESS 



19. Fire clay. 



18. Sandy shale and thin sandstone, showing some cross 



bedding at the base, light gray, buff or bluish. 

 17. Argillaceous shale with some sand, light gray in color. 

 16. Heavy sandy shale and thin sandstone, light gray, 

 buff or bluish. I 



15. Thin bedded dark blue or black shale. | 



14. Heavy bedded sandstone in the bed of the stream, 

 buff in color on fresh surface, but weathers brown. 

 13. Heavy sandstone similar to that above. ' 



12. Covered, partly sandy shale 



11. Thin, dark colored sandy shale weathering into 

 small irregular pieces. ] 



10. Thin light gray or blue shale weathering into small 



rectangular pieces. 

 9. Black bituminous shale, coaly in some places, especi- 

 ally toward the top, and with blocky sandstone 

 layers two or three inches thick. (Wellston coal 

 horizon?) 

 8. Light gray argillaceous shale, weathering to light 



gray or yellowish clay. 

 7. Soft argillaceous shale, dark blue or almost black. 

 6. Covered interval. Traces of coal in the bed of the 



stream. (Sharon coal?) 

 5. Sharon conglomerate. Thick bedded, buff, coarse- 

 grained quartz sandstone. 

 4. Dark blue sandy shale weathering brown, with part- 

 ings and lenses of light buff or brownish sandstone. 

 3. Maxville limestone. Thick bedded gray or bluish 

 limestone with some fossils. The heaviest bed, 

 which is at the base, is about two feet in thickness. 

 2. Thin bedded blue limestone with shaly partings, 



quite fossilifei'ous. 

 1. Covered to the level of Jonathan creek. 



2f 



TOTAL 

 THICKNESS 



38i 



Fossils collected from the Mercer limestone in Hough's Hollow : 



Orthothetes crassus (Meek and Hayden) 

 Productus cor a d'Orbigny 

 Productus longispinus Sowerby 

 Productus nehraskensis Owen 

 Spirifer camaratus Morton 

 Reticularia perplexa (McChesney) 

 Seminula argentea (Shepard) 



