Harwich Formation
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.[1]
| Harwich Formation | |
|---|---|
| Stratigraphic range: Ypresian | |
| Type | Formation |
| Unit of | Thames Group |
| Sub-units | Blackheath Member |
| Underlies | London Clay Formation |
| Overlies | Lambeth Group |
| Thickness | <2-24 m |
| Lithology | |
| Primary | sand, silt & clay |
| Other | gravel |
| Location | |
| Region | southeastern England |
| Country | United Kingdom |
| Extent | London Basin |
| Type section | |
| Named for | Harwich |
References
- "Harwich Formation". The BGS Lexicon of Named Rock Units. British Geological Survey. Retrieved 31 July 2016.
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