The BGS Lexicon of Named Rock Units — Result Details
Dounreay Shore Formation
| Computer Code: | DRAY | Preferred Map Code: | notEntered |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Eifelian Age (DI) — Givetian Age (DV) | ||
| Lithological Description: | Siltstone dominated rhythmic cycles of interbedded siltstone, fine-grained sandstone, bituminous mudstone and calcareous laminite limestone. | ||
| Definition of Lower Boundary: | Top of uppermost medium-grained cross-bedded sandstone of the underlying, sandstone dominated cyclic sequence, of the Sandside Bay Formation. | ||
| Definition of Upper Boundary: | Base of lowest medium-grained sandstone of the overlying, sandstone dominated, cyclic sequence of the Crosskirk Bay Formation. | ||
| Thickness: | 155m | ||
| Geographical Limits: | On shore and immediately offshore of Dounreay area, Caithness, Northern Scotland. | ||
| Parent Unit: | Caithness Flagstone Group (CNFL) | ||
| Previous Name(s): | Dounreay Siltstone Member
(DNSM)
Dounreay Siltstone Member (DNSM) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Section | Foreshore on the eastern side of Sandstone Bay c. 500 m north of the mouth of the Burn of Isauld (shown as the Achvarasdal Burn on OS 50k map) to Lower Dounreay (south eastern part of Dounreay Nuclear Establishment), Caithness. | ||
| Reference(s): | |||
| Fletcher, T P and Key, R M. 1991. Solid geology of the Dounreay District. British Geological Survey Technical Report WA/91/35C. | |||
| British Geological Survey. (In preparation, to be published in 2005). Bedrock geology. Scotland Special Sheet (Dounreay). 1:25 000. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| none recorded or not applicable | |||