Distribution of Boghead Algae 

 in Illinois Basin Coal Beds 



Russel A. Peppers and Richard D. Harvey 



Circular 558 1997 



ILLINOIS STATE GEOLOGICAL SURVEY 

 William W. Shilts, Chief 



Natural Resources Building 



615 E. Peabody Drive 



Champaign, Illinois 61820-6964 



(217)333-4747 





