[ITHSONIAN CONTRIBUTIONS TO KNOWLEDGE SHERZER. 



PLATE XIII. 



i. llliic hands giving rise to "dirt stripes," near nose of Illecillewaet Glacier. Bands 

 would here he conformable with strata if latter were present. 



FIG. 2. Contorted blue bands, Yoho Glacier. Supposed to indicate differential ic 



flowage. 



-Ice dyke filled with two tiers of hori/ontal ice prisms meeting 

 towards center. 



FIG. 4. Crevasse in Victoria Glacier, showing how superficial debris may 

 attain an englacial or subglacial position. 



