| Woolwich Formation | |
|---|---|
| Stratigraphic range: Paleogene | |
 Exposure in Gilbert's Pit. Dark grey clays, and light grey shelly clays of the Woolwich Formation, overlying the Upnor Formation sands | |
| Type | Formation |
| Unit of | Lambeth Group |
| Underlies | Harwich Formation of the Thames Group |
| Overlies | Upnor Formation |
| Thickness | max 14.5 m |
| Lithology | |
| Primary | claystone, sandstone |
| Other | lignite |
| Location | |
| Region | England |
| Country | United Kingdom |
| Extent | London and northern Kent |
| Type section | |
| Named for | Gilbert's Pit, Charlton |
The Woolwich Formation is a geological formation in southeast England.[1] It preserves fossils dating back to the Paleogene period.
