ILLUSTRATIONS 



>E FACING PAGE 



I. View from Wildcat Point, showing Gorge and Islands of the 



Susquehanna River 25 



II. Views of Cecil County 32 



Fig. 1. — View Susquehanna River from below Port Deposit. . . 32 



Fig. 2. — Gilpin Rocks, near Bay View 32 



III. View looking northeast from Grays Hill, near Elkton 40 



IV. Map showing Physiographic Divisions of Cecil County 64 



V. Views of Cecil County 68 



Fig. 1.— Topography of Elk Neck, Cecil County 68 



Fig. 2. — Turkey Point, from Maulden Mountain 68 



VI. Views of Cecil County 72 



Fig. 1. — A young valley in unconsolidated Coastal Plain 



Deposits 72 



Fig. 2.— Wave-cut cliff on west shore of Elk Neck 72 



VII. Views of Cecil County 80 



Fig. 1. — Susquehanna from Wildcat Point, showing side 



valleys 80 



Fig. 2. — View of rocky side-stream near Bald Friar 80 



VIII. Views of Piedmont Plateau 88 



Fig. 1. — Wildcat Point, showing depth of gorge cut in Pied- 

 mont Plateau by Susquehanna River 88 



Fig. 2. — Level Surface of Piedmont Plateau away from main 



drainage lines 88 



IX. Views of Piedmont Plateau 96 



Fig. 1. — View showing barrens underlain by serpentine 96 



Fig. 2. — View showing farmlands underlain by granite- 

 gneiss 96 



X. Views of Piedmont Plateau structure 104 



Fig. 1. — Railroad cut in contorted gneiss, above Bald Friar. . 104 



Fig. 2. — Nearer view showing character of folding 104 



XI. Views of Piedmont Plateau 136 



Fig. 1. — Gilpin Rocks (metarhyolite), near Bay View.... 136 



Fig. 2. — Falls over Gilpin Rocks, near Bay View 136 



XII. Geological sections in Cecil County 152 



Fig. 1. — Patapsco and overlying Raritan formations, Lower 



White Banks 152 



Fig. 2. — Nearer view of Raritan formation, Maulden Moun- 

 tain 152 



XIII. Geological sections in Cecil County 156 



Fig. 1. — Raritan formation overlain by Matawan 156 



Fig. 2. — Raritan formation overlain by Pleistocene, Northeast 



River 156 



