Upper jurassic and lower cretaceous rocks, west flank of Richardson Mountains between the headwaters of Blow River and Bell River, Yukon Territory

1961 ◽  
Author(s):  
J A Jeletzky
Keyword(s):  
Lower Cretaceous ◽  
Upper Jurassic ◽  
Yukon Territory ◽  
Richardson Mountains

Rock Glaciers of the Dalton Range, Kluane Ranges, South-West Yukon Territory, Canada

1988 ◽  
Vol 34 (118) ◽  
pp. 327-332 ◽  
Author(s):  
Peter G. Johnson ◽  
Diane Lacasse
Keyword(s):  
Late Pleistocene ◽  
Lower Cretaceous ◽  
Drainage System ◽  
Upper Jurassic ◽  
Yukon Territory ◽  
High Susceptibility ◽  
Frost Action ◽  
South West ◽  
Glacier Ice ◽  
Rock Glaciers

Abstract Glaciated valleys of the Dalton Range in the south-west Yukon Territory are dominated by rock glaciers identified as glacier ice-cored debris systems. The two rock glaciers studied have different amounts of deformation at present, resulting from post-formation mechanics. The primary formation of lobes of the rock glaciers resulted from periods of glacier activity in the Neoglacial, although older lobes, probably late Pleistocene in age, occur below the Neoglacial lobes. The hydrological systems of the rock glaciers have played a major role in the post-formation deformation of the land forms and the present drainage system is entirely sub-surface. The explanation for the extensive occurrence of rock glaciers in the Dalton Range is lithological as a result of the high susceptibility of the Upper Jurassic/Lower Cretaceous sediments to frost action and glacier erosion.

scholarly journals Rock Glaciers of the Dalton Range, Kluane Ranges, South-West Yukon Territory, Canada

1988 ◽  
Vol 34 (118) ◽  
pp. 327-332
Author(s):  
Peter G. Johnson ◽  
Diane Lacasse
Keyword(s):  
Late Pleistocene ◽  
Lower Cretaceous ◽  
Drainage System ◽  
Upper Jurassic ◽  
Yukon Territory ◽  
High Susceptibility ◽  
Frost Action ◽  
South West ◽  
Glacier Ice ◽  
Rock Glaciers

AbstractGlaciated valleys of the Dalton Range in the south-west Yukon Territory are dominated by rock glaciers identified as glacier ice-cored debris systems. The two rock glaciers studied have different amounts of deformation at present, resulting from post-formation mechanics.The primary formation of lobes of the rock glaciers resulted from periods of glacier activity in the Neoglacial, although older lobes, probably late Pleistocene in age, occur below the Neoglacial lobes. The hydrological systems of the rock glaciers have played a major role in the post-formation deformation of the land forms and the present drainage system is entirely sub-surface. The explanation for the extensive occurrence of rock glaciers in the Dalton Range is lithological as a result of the high susceptibility of the Upper Jurassic/Lower Cretaceous sediments to frost action and glacier erosion.

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