TABLE OF CONTENTS 

 PART I 



Page 



Stratigraphy of the fossiliferous members of the Pottsville formation 8 



Pennsylvanian system, general 8 



Pottsville formation, general 8 



Composite section of the Pottsville formation in Ohio 12 



Harrison ore 



Stratigraphy and extent 14 



Description of geologic sections and collecting localities 15 



Sharon ore 



Stratigraphy and extent 17 



Description of geologic sections and collecting localities 17 



Summary 20 



Anthony coal member 



Stratigraphy and extent 21 



Description of geologic sections and collecting localities 21 



Summary 22 



Quakertown or No. 2 coal member 



Stratigraphy and extent 23 



Description of geologic sections and collecting localities 24 



Summary 25 



Bear Run coal member 



Stratigraphy and extent 25 



Description of geologic sections and collecting localities 26 



Lowellville (Poverty Run) member 



Stratigraphy and extent 28 



Description of geologic sections and collecting localities 29 



Summary 35 



Boggs member 



Stratigraphy and extent 36 



Description of geologic sections and collecting localities 37 



Summary 44 



Lower Mercer limestone 



Historical review 46 



Stratigraphy and extent 46 



Description of geologic sections and collecting localities 49 



Summary 86 



Lower Mercer ore 



Stratigraphy and extent ,. 89 



Description of geologic sections and collecting localities 90 



Sand Block ore 



Stratigraphy and extent 90 



Description of geologic sections and collecting localities 91 



Upper Mercer member 



Historical review 92 



Stratigraphy and extent 92 



Conditions of deposition* 95 



Description of geologic sections and collecting localities 96 



Summary 114 



(5) 



