534 



Butts — Geologic Section of Blair and 



Axeman 

 limestone 



Nittany 

 dolomite 



Larke 

 dolomite 



Mines 

 dolomite 



Gatesburg 

 formation 



Warrior 

 limestone 



Pleasant Hill 

 limestone 



Waynesboro 

 formation 



Thin-bedded blue limestone with dolomite lay- 

 ers. Fossils. Liospira strigata, Hormotoma 

 artemesia, Hormotoma linearis, Dalmanella 

 wemplei f, Boloocephahis seeleyi. 



Thick-bedded, cherty dolomite. Fossils, but not 

 abundant. Lecanospira (Ophiletta) compacta, 

 Eccyliopterus planioasalis, Eccyliopterus plani- 

 dorsalis, Syntrophia lateralis, Cryptozoon steeli. 



Thick-bedded, coarse, steely blue dolomite. 

 Helicotoma uniangulata, Lingulellaf. 



Cherty dolomite, oolitic, yields much oolitic and 

 platy scoriaceous chert. Cryptozoon, 2 species, 

 common. 



Thick-bedded, steely blue, coarsely crystalline, 

 dolomite with many interbedded quartzite layers 

 up to 10 feet thick. Surface deeply covered with 

 sand and strewn with quartzite bowlders. Con- 

 siderable silicified oolite. Ore Hill limestone 

 member, thin-bedded, blue limestone; several 

 species of trilobites nearest relatives of which 

 are in the Hoyt limestone of New York. Stacy 

 dolomite member coarse, thick-bedded, steely 

 blue, but without quartzite. 



Thick and thin-bedded, blue limestone with thin 

 siliceous shaly layers or partings. A few thin 

 quartzite layers and an occasional bed of lime- 

 stone full of large well-rounded quartz grains. 

 Some oolite. Cryptozoon common. Several 

 species of trilobites. Millardia avitas. 



Thick-bedded limestone at top, fossils. Aero- 

 cephalites aoris. Argillaceous thin-bedded lime- 

 stone at bottom weathering to shale. 



Sandstone, conglomerate, and red and greenish 

 shale. 



