Text Figures 



Page 

 Sections of the Morrison formation showing decrease in thickness from 



western Colorado, eastward 114 



Type of cross-beding usually known as the stream type 116 



Type of cross-bedding usually known as the aeolian type 117 



Diagrammatic section of the exposure of the Morrison formation at the 



Marsh-Hatcher dinosaur quarry, near Canon City, Colorado 118 



Red hematitic grit, from the top of the Morrison formation at Garden 



Park, near Canon City, Colorado 119 



Fine grit, from near the top of the Morrison formation at Garden Park, 



Colorado 120 



Argillaceous limestone or calcareous clay, from the lower part of the Mor- 

 rison formation, near Mack, Colorado 121 



Calcareous sandstone, from the lower beds of the Morrison formation at 



Garden Park, Colorado 122 



Calcareous arkosic sandstone, from the lower beds of the Morrison forma- 

 tion at Garden Park, Colorado 123 



Calcareous argillaceous sandstone, from the Morrison formation near 



Canon City, Colorado 124 



Fossiliferous limestone, from the Morrison formation near Canon City, 



Colorado 125 



Calcareous arkosic sandstone, from the Morrison formation near Caiion 



City 127 



The same slide and field as above, with crossed nicols 128 



Calcareous arkosic sandstone ; the same as above 129 



A tributary of the Grand River near Mack, Colorado 167 



Cascade peneplain. From head of Miller River Basin 206 



Skykomish Mountains at Berlin. Skykomish River in foreground 206 



Skykomish Valley at Berlin 207 



Glacial lake. La Bohn Mountain in distance. On Foss River trail 207 



Lake Katharine. Glacial trough lake on Foss River drainage 208 



Run-off at Berlin from Miller River drainage basin 208 



Block diagram of a portion of the Skykomish Basin 209 



Audion, 31 figures 216-241 



