The BGS Lexicon of Named Rock Units — Result Details

Lower Bishopsmoat Beds

Computer Code: BIML Preferred Map Code: BIML
Status Code: Pending Upgrade
Age range: Ludlow Epoch (SU) — Ludlow Epoch (SU)
Lithological Description: Grey interbedded mudstones and siltstones; thin siltstones show parallel lamination, thicker beds are calcareous and commonly show intense convolute lamination.
Definition of Lower Boundary: Upward change in lithology from grey thickly bedded (blotchy) mudstone to grey interbedded siltstones and mudstones; thicker siltstones are calcareous and commonly show intense convolute lamination.
Definition of Upper Boundary: Not seen in area of survey.
Thickness: c. 125m. Lateral variations 0-400m.
Geographical Limits: Not defined.
Parent Unit: Not Entered (?)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Sheet 165. 
Reference(s):
Allender, R, Not published. On the stratigraphy and structure of an area of Ludlowian and Lower Downtonian near Bishops Castle, Shropshire. Ph.D. Thesis (1959) University of Wales. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E152