The BGS Lexicon of Named Rock Units — Result Details

Moreseat Sandstone Formation

Computer Code: MOSA Preferred Map Code: MOSA
Status Code: Full
Age range: Hauterivian Age (KH) — Barremian Age (KB)
Lithological Description: Sandstone, fine-grained, silty, glauconitic, very dark grey. Bioturbated with moulds of mollusca.
Definition of Lower Boundary: Not exposed. Probably unconformable on granite, or crystalline basement. Basal unit usually a strongly weathered siltstone.
Definition of Upper Boundary: Unconformable, overlain by the Buchan Ridge Gravel Member.
Thickness: About 12m. Not seen at one exposure.
Geographical Limits: The Buchan Ridge of Flett and Reed, 1921; Moss of Cruden. 1:10,000 sheets NK04SW, NK03NW. 1:50k geological sheet 87W (Ellon) and 87E (Peterhead).
Parent Unit: Cromer Knoll Group (CRKN)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Moss of Cruden, Aberdeenshire BGS registered pits, NK04SW 13, 14 & 17. Seen in temporary trial pits only, eg. NK04SW 13-15, 33-34, 24-26, 48. 
Reference(s):
Flett, J S and Read, H H, 1921. Tertiary gravels of the Buchan district of Aberdeenshire. Geological Magazine, Vol.58, p.215-225. 
Merritt, J W, Auton, C A, Connell, E R, Hall, A M and Peacock, J D. 2003. The Cainozoic geology and landscape evolution of north-east Scotland. Memoir of the British Geological Survey, Sheets 66E, 67, 76E, 77, 86E, 87W, 87E, 95, 96W, 96E and 97 (Scotland) 
Hall, A M and Jarvis, J, 1994. A concealed Lower Cretaceous outlier at Moss of Cruden, Grampian Region, Scotland. Scottish Journal of Geology, Vol.30, 163-166. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S087 S087