52 



vegetation for a uew coal seam could spring up and, in time, the processes 

 above detailed were again undergone. Such, in brief, was the origin and 



Legfnii. 

 Mudjo n Rive r 

 llmcstonPS and 

 SAaUs I 



JJ{a.(j ara ShuU 

 «i\d limtsfone 

 Lower HtlifrifTj 

 tnd i^ctex-Unti ~ 



Knobsfo-ne 



LiwfrCaTloni\triius 

 Limtshna O 



"MinsHtli 

 Prciuct ive 



lA/D/ANA 



at 1 h e C Z s e 0^ 

 Caihonildous Time. 



formation of those Ave great veins of coal which form today the chief 

 mineral wealth of our State, and of those vast beds of overlying shale 

 which, in recent years, have come to be used for so many varied products. 



