The BGS Lexicon of Named Rock Units — Result Details

Millyeat Member

Computer Code: MYTB Preferred Map Code: MyTB
Status Code: Pending Upgrade
Age range: Bolsovian Substage (CC) — Asturian Substage (CAS)
Lithological Description: Purple/red mudstone, sandstone, marl and thin coals with thin beds of limestone with Spirobis sp.
Definition of Lower Boundary: Top of highest major channel sandstone unit in the Bransty Cliff Sandstone Member.
Definition of Upper Boundary: Basal Permian unconformity.
Thickness: 180m maximum
Geographical Limits: West Cumbria Coalfield.
Parent Unit: Whitehaven Sandstone Formation (WS)
Previous Name(s): Millyeat Beds Member (-3572)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Millyeat Borehole, NY01NW/175. 
Type Section  Frizington Hall Borehole, NY01NW/174 from 12.8m to 155m depth 
Reference(s):
Eastwood T, and others. 1968. Geology of the country around Whitehaven. Memoir of the Geological Survey of Great Britain, Sheet 28 (England and Wales). 
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. 
Brockbank, W, 1891. On the occurrence of the Permian, Spirorbis limestones, and Upper Coal Measures at Frizington Hall in the Whitehaven district. Memoir of the proceedings of the Manchester Literary and Philosophical Society, Vol.4, 418-426. 
Jones, N S. 1993. Stratigraphical and sedimentological characteristics of the 'Whitehaven Sandstone Series', Westphalian C, West Cumbria coalfield. British Geological Survey Technical Report WH93/102/R. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E029 E028