The Great Stone blue plaque

This blue commemorative plaque records: The Great Stone. This glacial erratic boulder was formed in an explosive volcanic eruption during the Ordovician period, 450-460 million years ago. During the ice age possibly up to 400,000 years ago, it was carried by an ice sheet from the Snowden area of North Wales and deposited with many others around Northfield when the area was a frozen wasteland. For generations it lay at the corner of Church Road and Church Hill where it protected the Inn wall. The boulder was moved by Birmingham City Council to this site in 1954 for road safety reasons. Recorded plaque organisation: Birmingham Civic Society.

The Great Stone is a glacial erratic boulder originating from an Ordovician volcanic eruption, transported to Northfield during the ice age; it holds geological significance and local historical importance as a landmark that was relocated by Birmingham City Council in 1954.