b CONTENTS. 
Mineral resources — Continued. Page, i 
Coal — Continued. 
Sewickley coal 103 
Thickness and intervals 103 
Quality 1 04 
Union town coal 1 04 
Waynesburg coal 1 05 
Intervals 1 05 
Distribution 106 
Thickness 107 
Quality Ill j 
Waynesburg "A" coal 112 
Waynesburg " B " and Little Washington coals 1L3 
Washington coal 113 I 
Thickness 113 
Quality 114 
Jollytown coal 115 j 
Tenmile coal 115 
Local coals 116 
Coals which do not outcrop 1 1 6 '' 
Coals in the Conemaugh formation 1 16' 
Coals in the Allegheny formation 116 
Limestone 118 j 
Relative abundance 1 18 j 
Uses 118 
Limestones between the Pittsburg and Waynesburg coals (Mononga- 
hela formation) 11£ J 
Fish pot limestone 1 U j 
Ben wood limestone IK ! 
Waynesburg limestone 121 
Limestones above the Waynesburg coal (in the Dunkard group) 121 jj 
Local Limestones between the Waynesburg and Washington coals. 121 
Limestones above the Washington coal 12' 
Lower Washington limestone 12' ' 
Middle Washington limestone 12,' 
Jollytown limestone 12< 
Upper Washington limestone 12- 
Prosperity limestone 12! 
Sandstone 12 1 
Pittsburg sandstone 1 2'. '< 
Waynesburg sandstone 12;! 
Other sandstones 12' 
Clay and shale 1 2' i 
Clay 12-1 
Shale... 13 I 
Water resources 13 ■ 
Surface drainage 13 1 
Use of creek water 13 h 
Water supply of Washington 13 j j 
Other town supplies 13 
Supply of the farming communities 13 
Water-bearing horizons 13 
