Then and now

The glacier was God's great plough set at work ages ago to grind, furrow, and knead over, as it were, the surface of the earth.

Louis Agassiz. Swiss biologist and geologist. 1807-1873

Across the river the wild geese are beginning to gather for their long flight back to Iceland, where they will breed. The low hills beneath them are kames, dating from the last ice age. Kames are  mounds of sand, gravel and till that accumulated in a depression on a retreating glacier, to be deposited on the land surface when the glacier finally melted. I wonder how many geese have flown this way since the ice age?