242 



ANTHRACITE COAL MEASURES. 



Table shovnng the Order, Character, and Maximum Thick' 

 nesses of the Lower Secondary Formations of Pennsylva* 

 nia, east of the Susquehanna. 



Coal Measures, consisting of seams of Coal, 

 |'Ja(rk shales, argillaceous Sandstones, and Si'i' 

 "cious Conglomerates, 



^Trg^— (Vegetable Fossils.) 



Silicious Conglomerate. 



XI 



Red Shale. 



Thin calcareous Conglomerate 



Sandstone and Conglomerate. 



Red Shales, and Red, Gray, and Buff-col' 

 roured Argillaceous Sandstones. 



IX 



A few marine fossils. 



Coarse white Sandstone, (Cavities of fossils.) 



iiluc Argillaceous Limestone (fossils). 



Red and Variegated (fossiliterous iron ore). 

 Shales and Sandstone (fucoides). 



^ White Sandstone (fucoides). 



(Roofing Slates.) 



Dark Slate and Argillaceous Sandstone. 

 (A few fossils.) 



' — ^^^=:ri^ Bed of Limestone. 



Blue Limestone. 

 Beds of chert. 

 (A few fossils.) 



Compact White Sandstone. 



