Question

If you see a series of end moraines across, say, Ohio, do they represent:

a. Phases of maximum advance of glacial ice
b. Pauses in the retreat of glacial ice

Answer 1

End moraines across a region like Ohio represent phases of maximum advance of glacial ice.

Step-by-step explanation:

The series of end moraines across a region like Ohio represents phases of maximum advance of glacial ice. End moraines are glacial landforms that form at the furthest extent of glaciation, where the ice front remains stationary for a period of time. As the glacier advances, it deposits rocks, sediment, and debris, forming a ridge-like feature called an end moraine. These moraines indicate periods when the glacial ice was at its maximum extent and temporarily halted its retreat.