Sudbourne, Suffolk (TM 43585306)
A vertical section through about 5.5m of the Sudbourne Member is exposed here, with large-scale cross-bedding (set thickness of about 1m), including some trough cross-bedding. The sparse fauna at Valley Farm contains moulds of aragonitic bivalves and fragments of evidently transported bryozoan colonies. Shelly sands resting unconformably on the Coralline Crag may represent the Pleistocene Scrobicularia Crag. The aragonitic shells present in this deposit indicate that the leaching of aragonite from the Coralline Crag pre-dated deposition the Scrobicularia Crag.
Adapted from Daley and Balson, 1999.