Whitchurch Sand Formation
| Whitchurch Sand Formation | |
|---|---|
| Stratigraphic range: | |
| Type | Geological formation |
| Unit of | Wealden Group |
| Underlies | Gault, Lower Greensand Group |
| Overlies | Haddenham Formation, Portland Group |
| Thickness | up to 20 metres (70 ft) |
| Lithology | |
| Primary | Sandstone |
| Other | Mudstone, Siltstone, Ironstone |
| Location | |
| Region | Europe |
| Country |  UK |
| Extent | Buckinghamshire, Oxfordshire, Wiltshire |
| Type section | |
| Named for | Whitchurch, Buckinghamshire |
The Whitchurch Sand Formation is a geological formation, in England. part of the Wealden Group, it is preserved as an inlier in hills in Buckinghamshire, Oxfordshire and Wiltshire. It was deposited in the Valanginian stage of the Early Cretaceous. The lithology largely consists of unconsolidated fine-medium grained sand with isolated bodies of limonite cemented sandstone, with localised beds of siltstone and mudstone.[1][2]
References
[edit]- ^ "Whitchurch Sand Formation". BGS Lexicon of Named Rock Units. British Geological Survey. Retrieved 7 August 2018.
- ^ Radley, Jonathan D.; Allen, Percival (April 2012). "The marginal Wealden (non-marine Lower Cretaceous) between Wiltshire and Buckinghamshire, England". Proceedings of the Geologists' Association. 123 (2): 374–381. doi:10.1016/j.pgeola.2011.11.004. ISSN 0016-7878.
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