MARYLAND GEOLOGICAL SURVEY 



CAMBRIAN AND ORDOVICIAN, PLATE XI 



"EDGEWISE BEDS" CHARACTERISTIC OF BEEKMANTOWN (UPPER RIGHT HAND 

 FIGURE) AND CONOCOCHEAGUE FORMATIONS (LOWER FIGURE), HAGERSTOWN VALLEY, 

 WASHINGTON COUNTY. THE UPPER LEFT HAND FIGURE REPRESENTS THE CHARAC- 

 TERISTIC FINELY LAMINATED FEATURE OF THE BEEKMANTOWN LIMESTONE. 



