CONTENTS. 



CHAPTER VII. 

 AsuLKAN Glacier. 



1. General Characteristics 



2. Piedmont Characteristics . 



3 . Nourishment 



4. Moraines 



5. Crevasses 



6. Ice Structure 



7. Drainage 



8. Frontal Changes 



9. Former Activity 



a. Development and decadence 



b. Bear-den moraines 



c. Rate of retreat 



CHAPTER VIII. 



Summary and Conclusions. 



Physiographic Changes in the Region 



a. Mesozoic peneplain . 



b. Pre-pleistocene erosion 



c. Pleistocene erosion 



d. Pleistocene deposition 



Precipitation . . . . . 



a. Geographic distribution 



b. Climatic cycles 



c. Ice waves . . . . 



Piedmont Type of Glaciers 



Parasitic Glacier .... 



Bear-den Moraines .... 



Surface Features .... 



a. Dirt bands, zones, and stripes 



b. Differential melting effects 



Ice Structure . 



a. Stratification 



b. Shearing 



c. Blue bands 



d. Ice dykes 



e. Glacial granules 



Theories of Glacial Motion 

 Color of Ice and Glacial Water 



