572 COAL MEASURES OF MARYLAND 



in West Virginia. It was described as the Quakertown faiina by Reger 

 in his report upon the geology of Barbour, Upshnr, and western Randolph 

 Counties, West Virginia.^ 



ALLEGHENY FORMATION 



Character and thickness. — The Allegheny formation consists of inter- 

 bedded shale and sandstone and bears a number of important seams of 

 coal. Its lower beds are like those of the Pottsville formation, with 

 which they might well be united lithologically. They contain, however, 

 an abundant flora which shows that they are of Allegheny age. The 

 thickness of the formation varies from 240 to 275 feet. 



Members. — It contains the following members in descending order: 



Upper Freeport coal — Davis coal. 



Bolivar fireclay. 



Upper Freeport sandstone. 



Lower Freeport coal — Barrelville coal. 



Montell sandstone. 



Montell rider coal. 



Upper Kittanning ("Lower Freeport") coal — Montell coal. 



Little Montell coal — local. 



Mount Savage iron ore — Johnstown iron ore ? 



Hardman fireclay ("Furnace clay"). 



Piney Mountain coal. 



Westernport sandstone. 



Middle Kittanning coal — Luke coal. 



Middle Kittanning clay — Luke clay. 



Ellerslie sandstone. 



Lower Kittanning coal — ^Ellerslie coal. 



Lower Kittanning fireclay — Ellerslie fireclay. 



Mount Savage sandstone. 



Scrub-grass coal ? — Upper Mount Savage rider coal. 



Clarion coal ? — Upper Mount Savage coal. 



Clarion fireclay ? — Mount Savage fireclay. 



Brookville coal ? — Lower Mount Savage coal. 



The correlation indicated in the above list differs from that formerly 

 used in the Georges Creek A'alley, as shown in the chapter on correlation. 



CONEMAUGH FORMATION 



Character and thickness . — This formation consists of interbedded 

 shale, sandstone, limestone, and lenticular coal seams. The most char- 

 acteristic feature of the Conemaugh of Maryland is the presence of red 



° W. Va. Geol. Survey, Barbour and Uushur counties and western portion of Randolph 

 Countj% 1918, p. 273. 



