10 Questions
What type of hill or hummock is composed of stratified sand and gravel laid down by glacial meltwater?
Kame
During the post-glacial period, what type of rivers may have extremely high discharge in summer months?
Meltwater rivers
What is the mean winter discharge of the Glacier d'Argentière in France?
0.1-15 cumecs
Which type of kame is formed by en-glacial streams emerging at the snout of the glacier?
Delta kames
What differentiates kame terraces from lateral moraines?
Kame terraces are composed of glacio-fluvial deposits while lateral moraines are composed of unsorted material.
What is the composition of an esker?
Stratified sand and gravel
How are outwash plains typically drained?
By braided streams
What causes the deposition of material in debris-laden braided streams?
Decrease in water pressure
What defines periglacial environments more accurately?
Seasonal temperature variations, freeze-thaw cycles, and permafrost
What temperature conditions are suggested for periglacial environments due to climate change?
Mean annual temperatures less than -6C with much lower winter minimums and few days above 0C in summer
Test your knowledge about the post-glacial period and the formation of glacio-fluvial streams and river deposits. Learn about the gradual increase in temperatures and the characteristics of outwash sediment.
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