Questions and Answers
What are drumlins?
Drumlins are egg-shaped, elongated hills that are deposited in lowland areas.
Why are they formed?
Because the glacier, when pushing over a lowland area, is overloaded and melting, so deposits the moraine around any small obstacle, such as a rock outcrop or a small mound.
Where does most deposition occur?
Around the upstream end of the obstacle.
What happens to the rest of the boulder clay?
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What is the shape of the drumlin?
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What do drumlins occur in?
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Where are they found?
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What do they form?
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What is a drumlin diagram?
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What is a corrie diagram?
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Study Notes
Drumlins Overview
- Drumlins are elongated, egg-shaped hills found in lowland areas, formed by glacial activity.
Formation Process
- Formed when glaciers, overloaded and melting, deposit moraine around obstacles like rock outcrops or small mounds.
Deposition Characteristics
- Deposition primarily occurs around the upstream end of the obstacle, where materials accumulate due to ice movement.
Boulder Clay
- The rest of the boulder clay is deposited behind the obstacle and shaped by the flowing ice, contributing to the drumlin's formation.
Shape Description
- Drumlins feature a unique shape: blunt at one end and tapered at the opposite end.
Grouping
- Occur in clustered formations known as "Swarms," "Drumlin Fields," or "Basket of Eggs," all aligned parallel to the glacier's ice flow direction.
Geographic Locations
- Commonly found in lowland regions of south-west Scotland and North-west England, specifically in Ribble Valley and North Yorkshire.
Landscape Impact
- Form a notable landscape characterized by low hills, typically 30-40 meters high and 300-400 meters long, altering the topography significantly.
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Description
This quiz focuses on drumlins, their formation, and the areas where deposition occurs. It's designed to help you understand the characteristics and causes of these unique geological features. Perfect for students studying geology or physical geography.