PALEOZOIC FORMATIONS OF MARYLAND 429 



thick, weathering buff occurs about 295 feet above it. This 

 limestone, some of the layers of which contain plenty of speci- 

 mens of Ostracods {^Primatia frostburgensis Jones) and a few 

 other species, has been quarried to some extent toward the top 

 of Vale's Hill, east of the Consolidation Coal Company's pumping 

 station, and it is succeeded by thin black shales. The top of 

 the hill is ninety feet higher and on its slope forty feet above the 

 limestone ledge are loose pieces of bluish thin-bedded limestone 

 containing small Ostracod and Gastropod shells. Near the top 

 are loose blocks of coarse-grained sandstone which probably caps 

 the hill. This hill shows about 390 feet of the Dunkard forma- 

 tion, which is probably its greatest thickness in the county. In 

 addition to the fossils noted in the limestones, ferns were found 

 in the shales overlying the Koontz coal. 



The formation is named from the exposures along Dunkard 

 Creek, near the West Virginia-Pennsylvania line, is frequently 

 called the Upper Barren-measures, and is No. XVI of the Penn- 

 sylvania report. 



Charles S. Prosser. 



Columbus, O., 

 July 1901. 



