It is a generally admitted fact among observers of present-day geologic processes in high latitudes, but one upon which too little emphasis has been placed, that processes of weathering and removal of rock waste in sub-arctic regions are different from the controlling processes of degradation in more temperate regions. Among the better-known special agents of erosion active at high altitudes in temperate regions as well as in lower altitudes in sub-arctic regions, is the action of glacial ice. Of the processes not so well understood or appreciated is that of the flow of soils, or "solifluction," described for Bear Island of the North Atlantic Ocean by J. G. Andersson.2 Mr. Andersson considers " solifluction" to be an important agent in the peneplanation of areas in high latitudes, and the process is without question a most important one in many parts of Alaska. Other processes which, according to Daly,3 may be effective in producing an accordance of summits in mountainous regions, accordances which are generally referred to as indicating dissected peneplains, are frost