Due to the quarrying of the sands and gravels, geologists have been able to work out the history of the ridge and how it formed.
Thousands of years ago, when much of Norfolk was covered in ice, a river of meltwater was flowing beneath the glacier, carrying large amounts of sand and gravel. As the water slowed, it laid down this sediment. When the glacier retreated, the sand and gravel ridge remained. Vegetation now covers the esker, and quarrying has changed the look of it.
However, it still remains a prominent feature in Norfolk’s landscape, a reminder of its icy past.
Acknowledgement: Many thanks to Steve Pawley (Royal Holloway, University of London) for his expert advice concerning this topic.