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Post-Glacial Climate Change and Glacio-Fluvial Deposits

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Post-Glacial Climate Change and Glacio-Fluvial Deposits

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Questions and Answers

What type of hill or hummock is composed of stratified sand and gravel laid down by glacial meltwater?

Kame (correct)

Esker

Moraine

Drumlin

During the post-glacial period, what type of rivers may have extremely high discharge in summer months?

Outwash rivers

Glacial rivers

Fluvial rivers

Meltwater rivers (correct)

What is the mean winter discharge of the Glacier d'Argentière in France?

30-35 cumecs

20-25 cumecs

10-11 cumecs

0.1-15 cumecs (correct)

Which type of kame is formed by en-glacial streams emerging at the snout of the glacier?

Delta kames Signup and view all the answers

What differentiates kame terraces from lateral moraines?

Kame terraces are composed of glacio-fluvial deposits while lateral moraines are composed of unsorted material. Signup and view all the answers

What is the composition of an esker?

Stratified sand and gravel Signup and view all the answers

How are outwash plains typically drained?

By braided streams Signup and view all the answers

What causes the deposition of material in debris-laden braided streams?

Decrease in water pressure Signup and view all the answers

What defines periglacial environments more accurately?

Seasonal temperature variations, freeze-thaw cycles, and permafrost Signup and view all the answers

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 Signup and view all the answers