The BGS Lexicon of Named Rock Units — Result Details

Whirl Howe Formation

Computer Code: WHH Preferred Map Code: WHH
Status Code: Pending Upgrade
Age range: Caradoc Series (O4) — Ashgill Series (OA)
Lithological Description: Very variable volcaniclastic breccias, conglomerates and sandstones (Longsleddale Member) and overlying calcareous siltstone (Stile End Member).
Definition of Lower Boundary: Sub-Windermere Group unconformity - rests discordantly on the Borrowdale Volcanic Group.
Definition of Upper Boundary: Defined by the base of the overlying Yarlside Volcanic Formation.
Thickness: 70 metres (0 - 70 metres).
Geographical Limits: Not defined.
Parent Unit: Not Entered (?)
Previous Name(s): Stile End Formation (SEN)
Whirl Howe Formation [Obsolete Code: Use WHH] (WHW)
Longsleddale Formation (-2530)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Whirl Howe. 
Reference(s):
Kneller, B C, Scott R W, Soper N J, Johnson E W and Allen P M, 1994. Lithostratigraphy of the Windermere Supergroup, Northern England. Geological Journal, Vol. 29, 219-240. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E039