❓ why
Why do some mountain glaciers create lakes when they melt?
Quick Answer
Glaciers can carve basins, dam valleys with debris, or leave behind hollows that fill with meltwater. When the ice retreats, the water remains as a lake.
The Full Story
Glaciers are powerful excavators. They can gouge out basins in bedrock, leave moraine dams made of rubble, or block drainage paths while still advancing. When the ice melts or retreats, those depressions and dams can trap water. Many alpine lakes in Canada, Switzerland, New Zealand, and Patagonia were formed this way. The shape and depth of the lake often reveal how the glacier moved and where it deposited debris.
Key Facts
1.Glaciers can carve basins and leave moraine dams
2.Retreating ice can leave behind permanent lakes
3.Many alpine lakes are glacial in origin
YouTube Angle
Suggested video title for this topic:
"Why do melting glaciers leave behind so many lakes?"
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