The BGS Lexicon of Named Rock Units — Result Details

Glannoventia Formation

Computer Code: GVA Preferred Map Code: GV
Status Code: Full
Age range: Devensian Stage (QD) — Devensian Stage (QD)
Lithological Description: Yellow and grey, laminated, shelly, silty sand passing downwards into brownish grey shelly silt and dark brown laminated calcareous clay. Containing cold water marine microfauna of probable mid-Devensian age.
Definition of Lower Boundary: Gradational, conformable contact with underlying pinkish grey, dusky red and pale reddish brown laminated silt and clay of the Carleton Silt Formation.
Definition of Upper Boundary: Sharp, planar, unconformable contact with stiff stony diamicton of the Holmrook Till Member of the Blengdale Glacigenic Formation.
Thickness: To 11.9m
Geographical Limits: West Cumbria, Wasdale basin and coastal zone immediately to the west (around Drigg and Hall Carleton).
Parent Unit: British Coastal Deposits Group (COAS)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Nirex Borehole QBH2A (SD09NE21), from 49.5 to 56.3 m depth. Nirex, 1997. 
Reference Section  BNFL Drigg Off-site Borehole D, from 33.21 to 37.23 m depth. Nirex, 1997. 
Reference(s):
Akhurst, M C, Chadwick, R A, Holliday, D W, McCormac, M, McMillan, A A, Millward, D, Young, B, Ambrose, K, Auton, C A, Barclay, W J, Barnes, R P, Beddoe-Stephens, B, James, J C W, Johnson, H, Jones, N S, Glover, B W, Hawkins, M P, Kimbell, G S, MacPherson, K A T, Merritt, J W, Milodowski, A E, Riley, N J, Robins, N S, Stone, P and Wingfield, R T R. 1997. The geology of the west Cumbria district. Memoir of the British Geological Survey, Sheets 28, 37 and 47 (England and Wales). 138pp. 
Merrit, J W and Auton, C A. 2000. An outline of the lithostratigraphy and depositional history of Quaternary deposits in the Sellafield district, west Cumbria. Proceedings of the Yorkshire Geological Society, Vol.53, 129-154 
Merritt, J W and Auton, C A. 1997. Quaternary lithostratigraphy of the Sellafield district. Nirex Science Report SA/97/045 (Issue 2.0). [Report prepared for UK Nirex Ltd. 69pp, 5 tables, 20 figures, 14 enclosures and one appendix.] 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable