The BGS Lexicon of Named Rock Units — Result Details

Lydebrook Sandstone Formation

Computer Code: LYS Preferred Map Code: LyS
Status Code: Full
Age range: Holkerian Substage (CQ) — Asbian Substage (CR)
Lithological Description: Orange-brown, fine- to coarse-grained sandstone, locally pebbly, with subordinate mudstones.
Definition of Lower Boundary: The lower boundary is taken at the base of sandstone, resting unconformably on, and overstepping, limestone (Jackie Parr Limestone Formation), and mudstone and sandstone (Silurian and Cambrian strata).
Definition of Upper Boundary: The upper boundary is taken at the base of calcreted limestones of the overlying Sylvan Limestone Formation.
Thickness: c.20 to 37m in the Lilleshall [SJ7315] and Coalbrookdale [SJ6408] areas.
Geographical Limits: Coalbrookdale [SJ 64083]; Lilleshall [SJ 7315].
Parent Unit: Peak Limestone Group (PKLM)
Previous Name(s): Lydebrook Sandstone (-4176)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Disused building stone quarries and natural waterfalls in Lydebrook Dingle [SJ 6506]. 
Reference Section  Lilleshall Borehole L18 (SJ71NW/64), 37.00 - 61.51m below ground level. 
Reference(s):
Pocock R W, Whitehead T H, Wedd C B and Robertson T. 1938. Shrewsbury District including the Hanwood Coalfield. Memoir of the Geological Survey of Great Britain, England and Wales. (London: H.M.S.O.). 
Hamblin, R J O and Coppack, B C, 1995. Geology of Telford and the Coalbrookdale Coalfield. Memoir of the British Geological Survey, parts of Sheets 152 and 153 (England and Wales). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E153