Drumlims Flashcards
1
Q
What are drumlins formed of?
A
Moraine or till.
2
Q
How are drumlins formed?
A
When the glacier is overloaded with moraine from freeze-thaw weathering, abrasion and plucking, and it has also melted so it has less energy to carry the material.
When the glacier meets the obstacle on the ground it does not have the energy to carry the moraine over it, so it deposits moraine around it.
More is deposited first creating blunt end.
Less is deposited creating the tapered end.
