And the winner is.......

The answer to the multi choice question which I posed last week is....

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....kames!

I am pleased to see that the majority of you got it right. let's look at the other choices, though. Drumlins are indeed mounds but as they were deposited directly by ice, they they are made up of unsorted materials. Eskers comprise sorted sands and gravels but they are more twisting ridge than undulating mound. So, by a process of elimination, the correct answer was kames - quite enigmatic features of fluvioglacial deposition created by meltwater which at one time flowed in contact with the ice, often forming deltas of sorted material at the snout of glaciers. As the glaciers retreat, the mounds often collapse making the layering difficult to spot.