ES, 
graphy, 
and 
6 ) 
a has 
and 
ments 
ntly 
zozoic), 
31976) 
rore- 
ified: 
en 
allow 
ly- 
1ts from 
lakes and ponds with characteristic rectangular pattern and 
general orientation NW-SE (oriented lakes, Price,1968) 
Old Crow River and its tributaries are meandering in the 
valleys which incise the level of Plain 20 to 40 me Existence 
of thick permafrost and silty character of surficial deposits 
determine presence of ground ice and important role of 
thermo karst processes. Thermal erosion along river channels 
and lakes shorelines is the most significant as geomorphic 
process responsible for the present remodelation of relief. 
British Mtns. and Richardson Mtns. are characterised by 
strong dissection of terrain , with densely, structuraly 
controled drainage network. These nonglaciated mountains, 
(at least in Wisconsian), lay in frost rubble zone, sensu 
Büdel, and are characterised by the complex of periglacial 
processes and correlative landforms well described from 
Alaska, Northern Canada and Syberia. 
The precise description of morphological units of the 
presented fragment of Landsat mosaic is beyond the scope of this 
paper. It should be once more stated that the regional 
geomorphological analysis of Yukon Territory, required for the 
map compilation, was very strongly suported by the use of 
Landsat mosaics.