Silbury Hill

This is a view from the north when Silbury was in flood. The land under water was once a neolithic quarry at the southerly limit of a belt of alluvium (see useful map and details of Silbury excavations at mikepitts.wordpress.com/2013/01/12/silbury-hill-flooded/). The quarry fills with water from the Beckhampton brook when the water table rises. A bit further south are Swallowhead Springs, officially the source of the river Kennet. Swallowhead marks the confluence of waters from the north, many of which are winterbournes, and quite dry during summer.