The BGS Lexicon of Named Rock Units — Result Details

Horrace Formation

Computer Code: HOF Preferred Map Code: HOF
Status Code: Pending Upgrade
Age range: Wenlock Epoch (SW) — Ludlow Epoch (SU)
Lithological Description: Laminated silty mudstone. Underlying and overlying units are greywacke sandstones.
Definition of Lower Boundary: Incoming of laminated silty mudstone above Harlock Formation (sandstone).
Definition of Upper Boundary: Base of overlying formation/subgroup turbidite sandstones.
Thickness: 600m.
Geographical Limits: Not defined.
Parent Unit: Not Entered (?)
Previous Name(s): Horrace Flags (-4098)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Horrace Hill, Sheet 48, Ulverston. 
Reference(s):
Rose, W C C. 1977. Geology and Hematite deposits of South Cumbria. Economic Memoir for 1:50,000 Sheet 58 and southern part of Sheet 48. Memoir of the geological Survey of Great Britain. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E048