glacial landforms
TRANSCRIPT
Peter Knight's Photos of Landscapes and Glaciers
(Keele University)*
The smallest scale of glaciation: Niche glaciers and ice aprons in the Grand Tetons, Wyoming, USA. Small glaciers such as these are often the most sensitive to local climate change.
Niche glaciers
The summit ice cap of the volcano,Cotopaxi, Ecuador
The ice cap extends further on one side of the mountain. The side of the mountain facing the moisture-bearing winds has higher snowfall and hence more extensive glaciation. The deep channels carved by meltwater and by volcanic mudflows (lahars) caused by melting of snow and ice during eruptions.
RUTH GLACIER, MOUNT MC KINLEY
VALLEY GLACIER
Regal and Nizina Glaciers, Alaska
West Greenland
ICE SHEET
B
A
April 67N
August 67N
Greenland
Greenland
Russell GlacierIce Front
Snout or Ice Front
CREVASSEICE CAVE
SUPRAGLACIAL STREAM
*
Ice cliff
Subglacial stream
1960 1964
1954 1958
retreated dramatically in the twentieth century
Franz Josef Glacier, located in New Zealand
Ice scoured topography
Clean ice sliding on bedrock*
MOUNT MC KINLEY
Athabasca Glacier
A
B C
Striations
Erratics
1
1
1
1
2
3
4
Lateral and terminal moraines, Bylot Island, Canada
End moraine, Bylot Island,
Canada
Moraines of different ages
Ice Front
*
PUSH MORAINE
Proglacial zone
Ice-dammed lake
BRAIDED CHANNEL
OUTWASH PLAINS
RAISED BEACH, W. SCOTLAND