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ILLUSTRATIONS VI 1 



Page 



: Exposures of Bighorn and Whitewood limestones 556 



Exposures of Ordovician rocks and Harding limestone . . . 557 

 Exposure of the shale member lying between Harding 



sandstone and Fremont limestone 562 



Crater salt lake 721 



Mount Capulin, New Mexico 722 



Interior of crater of mount Capulin 722 



Central plug of mount Capulin 723 



Lava fields and volcanic cones 723 



Figures 

 Take and Martin : 



Figure 1 — Cross-section of northeast shore of Russell fiord opposite 



Marble point 52 



' ' 2 — Sketch map of east coast of Yakutat bay 53 



Berkey : 



Figure 1 — Areal distribution of the Saint Peter sandstone formation 231 



' ' 2 — Lower Paleozoic formations 233 



" 3 — Generalized sketch illustrating relationship of interbedded 



sandstones to great basal sandstone formation 235 



' ' 4 — Stratigraphi • range of the basal sandstone 241 



" 5 — Continental outline at maximum retreat of the seas in mid- 

 Saint Peter time 248 



" 6 — Continental outline near close of Saint Peter time 249 



Cross and Howe : 



Figure 1 — Drainage map of the San Juan region 253 



" 2 — Sketch map of the Uncompahgre valley 255 



Hobbs : 



Figure 1 — Map of the Guadix and neighboring formations 286 



< ' 2 — Type of cross-bedding 291 



" 3 — Faulted torrential deposits at Rossao, nCalabria 292 



Dowling : 



Figure 1 — Map of part of Alberta and British Columbia 296 



Gilbert : 



Figure 1— Profile of part of glacier bed 305 



" 2 — Diagrammatic sketch of crescentic gouge 305 



' ' 3 — Cross-section of crescentic gouge 7 306 



' ' 4 — Diagrammatic sections of fractures 306 



' ' 5 — Longitudinal section of lower part of a glacier 308 



' ' 6 — Longitudinal section of lower part of a glacier 308 



' ' 7 — Ideal oblique view of originally plain rock surface 309 



" 8 — Theoretic deformation of rock beneath a glacier 310 



" 9 — Theoretic origin of fractures producing the crescentic gouge. . 311 

 " 10 — Theoretic origin of the oblique and vertical fractures of the 



crescentic gouge 311 



" 11 — Banding and unconformity in granite 324 



