MARYLAND GEOLOGICAL SURVEY 



CAMBRIAN AND ORDOVICIAN, PLATE XXII 



FlG. I. EXPOSURE OF LOWER PART OF MARTINSBURG SHALE ALONG WESTERN MARYLAND 

 RAILWAY, ABOUT ONE-HALF MILE EAST OF PINESBURG STATION, MARYLAND. THE GENTLE 

 DIP OF THE STRATA AND THE CLEAVAGE AT RIGHT ANGLES ARE WELL SHOWN. 



. 2. VIEW ACROSS VALLEY OF CONOCOCHEAGUE AND BEEKMANTOWN LIMESTONES, FROM 

 A POINT TWO MILES EAST OF LITTLE GEORGETOWN, WEST VIRGINIA. CONOCOCHEAGUE CHERT 

 STREWS THE FOREGROUND. NORTH MOUNTAIN IN THE DISTANCE CONTAINS THE JUNIATA 

 AND TUSCARORA FORMATIONS. 



