What is the origin of curved ridges (R on this figure)in the Great Lakes area?
A)folds produced during a continental collision
B)paths of ancient rivers
C)piles of sediment deposited by retreating glaciers
D)remnants of a meteoroid impact

Question

What is the origin of curved ridges (R on this figure)in the Great Lakes area? 
A)folds produced during a continental collision 
B)paths of ancient rivers 
C)piles of sediment deposited by retreating glaciers 
D)remnants of a meteoroid impact

Quizplus · Accepted Answer

The curved ridges (known as eskers) in the Great Lakes area are piles of sediment that were deposited by retreating glaciers. These ridges were formed when meltwater flowed through and under the ice, depositing sediment in long, winding piles. Over time, the glaciers melted away, leaving behind the eskers.

What Is the Origin of Curved Ridges (R on This