Which of the following best explains the origin of eskers in glaciated landscapes?
Show answer & explanation
Correct answer: C
Explanation
Correct Answer:
Sinuous ridges from subglacial meltwater deposition
Explanation:
Eskers are long, winding ridges formed by the deposition of sand and gravel by meltwater streams flowing beneath glaciers (subglacial streams). When the glacier melts, these sediments are left behind as sinuous ridges on the landscape.
Thus, eskers are formed through a depositional process involving subglacial meltwater, not by erosion or ice pushing.
Key Points:
Eskers are formed by subglacial meltwater deposition.
They are long, sinuous ridges of sand and gravel.
They appear after glaciers retreat or melt.
They are depositional, not erosional landforms.
Additional Facts:
Eskers are commonly found in formerly glaciated regions such as Canada, Northern Europe, and Alaska.
They are an important type of glacial depositional feature.
Important Questions:
Q1: How are eskers formed?
Ans: By deposition from subglacial meltwater
Q2: What materials make up eskers?
Ans: Sand and gravel
Q3: What type of landform is an esker?
Ans: Depositional landform