Type Formation Thickness <2-24 m Other gravel Named for Harwich Underlies London Clay | Sub-units Blackheath Member Primary sand, silt & clay Region southeastern England Overlies Lambeth Group Unit of Thames Group | |
The Harwich Formation is a geological formation found in the London Basin of southeastern England. It is Ypresian (early Eocene) in age. It lies unconformably on the Lambeth Group over most of its extent, but may overlie either the Thanet Formation or the Chalk Group to the south. It is overlain by the London Clay Formation.
References
Harwich Formation Wikipedia(Text) CC BY-SA