MARYLAND GEOLOGICAL SURVEY 



MAP 



SHOWING THE DISTRIBUTION OF THE 



CAMBRIAN AND ORDOVICIAN FORMATIONS 



OF 



MARYLAND 



BY K. 8. BAS8LER 



1919 



LEGEND 



Of ! Frederick limestone 



Om Martiuslmrtf shale 



MARYLAND GEOLOGICAL SURVEY 

 EDWARD BENNETT MATHEWS. STATE GEOLOGIST 



SCAI.K : One inch equals five miles 

 1:312,500 



Cc 



Conococheague limestone 



Ce Klbrook limestone 



Waynesboro formation 

 Ct I Tomstown limestone 



Silurian and Devi 

 Pre Cambrian coi 



,] Antietam, Harpers, Weverton 

 and Loudon 



WOO 



Beekmantowu limestone 

 Newark formation 



7750' 



77 40' 



