ILLUSTEATIOI^S 



FULLr-PAGE PLATES 



Plate 1 Frontispiece 



Stone Mountain, Georgia. A Eesidual Boss of Granite. 

 From a photograph by J. K. Hillers. 



FACING PAGE 



Plate 2 80 



Porphyritie and Flow Structures. 

 Plate 3 S2 



Slaggy and Vesicular Structures. 

 Plate 4 84 



Breeciated Structures. 

 Plate 5 88 



Microscopic Structures of Hocks. 

 Plate 6 .••... 61 



Fig. 1, Liparite, Nevadite form. 



Fig. 2, Liparite, Rhyolite form. 



Fig. 3, Liparite, Obsidian form. 



Fig. 4, Liparite, Pumiceous form. 

 Plate 7 • ... 76 



Fig. 1, Orbicular Diorite. 



Fig. 2, Granite Spheroid. 

 Plate 8 100 



Fig. 1, Botryoidal Hematite. 



Fig- 2, Septarian Nodule. 

 Plate 9 106 



View in Limestone Cavern. 

 Plate 10 113 



Fig. 1, Shell Limestone. 



Fig. 2, Shell Limestone (Coquina). 



Fig. 3, Crinoidal Limestone. 



xvii 



