The BGS Lexicon of Named Rock Units — Result Details
North Denes Formation
| Computer Code: | NRD | Preferred Map Code: | notEntered |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Holocene Epoch (QH) — Holocene Epoch (QH) | ||
| Lithological Description: | The North Denes Formation consists of an elongate, wedge-shaped body of sand with subordinate gravel and thin layers of silty clay. | ||
| Definition of Lower Boundary: | The North Denes Formation rests unconformably mostly on the silts, clays and sands of the Breydon Formation, but also on the sands and gravels of the Crag Group, and to a lesser extent on the glacigenic deposits of the Happisburgh Formation. | ||
| Definition of Upper Boundary: | Surface, or else covered by blown sand. | ||
| Thickness: | c. 26 m. | ||
| Geographical Limits: | The formation comprises a coastal barrier, 1 km wide by 8 km long, between Caister-on-Sea and Gorleston-on-Sea. The present coastline is taken as an arbitary eastern limit. | ||
| Parent Unit: | British Coastal Deposits Group (COAS) | ||
| Previous Name(s): | Cerdic Shore [Obsolete Name and Code: Use NRD]
(-4814)
Cerdic Sand [Obsolete Name and Code: Use NRD] (-4225) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Section | Marine Outfall Borehole 8, TG50NW/542. Arthurton et al., 1994. | ||
| Reference(s): | |||
| Arthurton, R S, Booth, S J, Morigi, A N, Abbott, M A W, and Wood, C J. 1994. Geology of the country around Great Yarmouth, Sheet Memoir 162, British Geological Survey. [London: HMSO.] 138pp. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E162 | |||