Vlll BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



NeWSOM : Page 



Figure 9 — Dike 25, at north end of Point quarry 239 



' ' 1 — Map and cross-section 240 



" ] 1— Dike 29, west of Santa Cruz, California 242 



" 12— Plan of dike 30 242 



" 13— Bituminized sandstone dikes 243 



" 14 — Mass of bituminous sandstone 244 



" lo — Diagram of dike at 48 24G 



** 16 — Sandstone intrusion at 49, figure 10 247 



" 17 — Diagram showing structure of dike 52 249 



" 18 — Diagram of dike 57 250 



" 19 — Diagram of sandstone dikes near Stanford universitj', Cali- 

 fornia. ... 253 



Campbell: 



Figure 1 — Map showing warped surface of Harrisburg (early Tertiary) 



peneplain 279 



Hice: 



Figure 1 — Map and section of portion of Beaver river 298 



Grabau : 



Figure 1 — Diagrammatic cross-section of a Devonic coral reef 339 



Julien : 



Figure 1 — Fault breccia in quartz vein two feet wide, in quartz-diorite 



schist 431 



" 2 — Concentric cross-section in calcite grain (x 150) observed be- 

 tween crossed nicols in thin-section of hornblende schist. . 438 

 " 3 — Yellow nodules of epidotic hornblende gneiss imbedded in 



micaceous gneiss 445 



" 4 — Diagram showing proper section plane inclined to fibration, 



in thick blades 463 



" 5 — Diagram showing proper section plane inclined to schist 



plane, in thin blades 464 



" 6 — Tongue of biotitic quartz diorite schist (end of sheared layer? ) 



in micaceous gneiss, with adjacent lenses of pegmatite 471 



" 7 — Emergence of apophyses and section of sheets of biotitic 



quartz-diorite schist 472 



" 8 — Diagrammatic sketches illustrating two periods in history of 



a dike with its apophyses, and first effect of shearing. . . . 473 

 " 9 — Tremolite and serpentine tract, with associated gneisses and 



beds of hornblende schist 488 



(65 plates; 43 figures.) 



