| Computer Code: |
LAWA |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Sinemurian Age (JS)
— Pliensbachian Age (JE) |
| Lithological Description: |
Sandy and shelly siltstones and mudstones with marine fauna, fining upwards as marine conditions deepened to open marine from shallow neritic conditions. Minor indicators of cyclicity, probably due to changing water depths and energy conditions. |
| Definition of Lower Boundary: |
Abrupt lithology change from sandstone of the Mains Formation to mudstone. |
| Definition of Upper Boundary: |
Unconformity and erosion to Bathonian-age sandstones and coals of the Fladen Group. |
| Thickness: |
Unrecorded. |
| Geographical Limits: |
Inner Moray Firth Basin. |
| Parent Unit: |
Dunrobin Bay Formation [See Also DUNR] (DRB)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Golspie, Dunrobin Bay, Moray Firth. Batten, Trewin and Tudhope, 1986. |
| Reference(s): |
| Batten, D J, Trewin, N H, and Tudhope, A W. 1986. The Triassic-Jurassic junction at Golspie, Inner Moray Firth Basin. Scottish Journal of Geology, Vol. 22, Pt. 1, 85-98. |
| Richards, P C, Lott, G K, Johnson, H, Knox, R W O'B. and Riding, J B. 1993. 3. Jurassic of the Central and Northern North Sea. In: Knox, R W O'B and Cordey, W G (eds.). Lithostratigraphic nomenclature of the UK North Sea. British Geological Survey, Nottingham. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S103
|
