description Black Esker Overview
help Black Esker FAQ
What is the Black Esker?
The Black Esker is a glacial formation in Canada. It is an elongated ridge made from stratified sand and gravel deposited by glacial meltwater.
How do eskers form?
Eskers form when streams flowing beneath or within a glacier deposit sand and gravel in channels. After the ice retreats, the sediment remains as a long raised ridge.
Is the Black Esker made of volcanic rock?
Its defining material is stratified sand and gravel, not a volcanic lava flow. The ridge records sediment left behind by retreating glaciers.
Why is the Black Esker important geologically?
It preserves evidence of past glacial movement and meltwater drainage in Canada. Its elongated shape helps show how sediment was deposited before the glacier retreated.
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