The BGS Lexicon of Named Rock Units — Result Details

Rusland Member

Computer Code: RSD Preferred Map Code: RSD
Status Code: Full
Age range: Ludlow Epoch (SU) — Ludlow Epoch (SU)
Lithological Description: Sandstone beds to 75cm thick within siltstone and mudstone sequence of the Bannisdale Formation.
Definition of Lower Boundary: Incoming of sandstone into the Bannisdale sequence. Interdigitates with siltstones.
Definition of Upper Boundary: Transitional into Bannisdale Formation, siltstone and mudstone.
Thickness: 0 - 900m
Geographical Limits: Southern Lake District.
Parent Unit: Bannisdale Formation (BND)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Type Area  Rusland Valley, about 5km northwest of Newby Bridge. 
Soper, N J, 1993. Geology of 1:25,000 Sheet SD38. British Geological Survey Technical Report, WA/93/16. 
1:50K maps on which the lithostratigraphical unit is found, and map code used: