The BGS Lexicon of Named Rock Units — Result Details

Latterbarrow Sandstone Formation

Computer Code: LAS Preferred Map Code: LaS
Status Code: Full
Age range: Caradoc Series (O4) — Caradoc Series (O4)
Lithological Description: Sandstone (quartz-wacke) intercalated with mudstone in upper part.
Definition of Lower Boundary: Taken at the marked change to sandstone from silty mudstone containing an acritarch assemblage of Tremadoc to Arenig age (Skiddaw Group). Junction is nowhere exposed, but has been interpreted as an unconformity on mapping evidence.
Definition of Upper Boundary: Defined by the change to coarse volcaniclastic rocks at the base of the Devoke Water Member (Birker Fell Andesite Formation).
Thickness: 400m+
Geographical Limits: Western part of the Borrowdale Volcanic Group outcrop, west of the Ennerdale Intrusion, Kinniside Common, Cumbria.
Parent Unit: Borrowdale Volcanic Group (BVG)
Previous Name(s): Latterbarrow Sandstone (-4143)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Sheet 28, Latterbarrow, Lake District. 
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. 
Allen, P M and Cooper, D C. 1986. The stratigraphy and composition of the Latterbarrow and Redmain sandstones, Lake District, England. Geological Journal, Vol.21, 59-76. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E028 E037