Westbury Formation
The Westbury Formation is a geological formation in England, one of the Penarth Group. It dates back to the Rhaetian. The formation is named after the village of Westbury-on-Severn in Gloucestershire. The remains of giant shastasaurids are known from the formation.
| Westbury Formation | |
|---|---|
| Stratigraphic range: | |
| Type | Geological formation |
| Unit of | Penarth Group |
| Underlies | Lilstock Formation |
| Overlies | Blue Anchor Formation |
| Thickness | 5-10 m |
| Lithology | |
| Primary | Mudstone, Shale |
| Other | Limestone, Sandstone |
| Location | |
| Region | Europe |
| Country | UK |
| Type section | |
| Named for | Westbury-on-Severn |
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