The BGS Lexicon of Named Rock Units — Result Details

Lang Geo Sandstone Member

Computer Code: LGE Preferred Map Code: LGe
Status Code: Full
Age range: Givetian Age (DV) — Givetian Age (DV)
Lithological Description: Rhythmic pale greyish red sandstones with subordinate siltstone and mudstone; pale green reduction spots common throughout.
Definition of Lower Boundary: Conformable on Hoy Volcanic Formation or unconformably resting on the Lower Eday Sandstone Formation.
Definition of Upper Boundary: Gradational boundary with poorly-cemented pale greyish orange sandstones of the Lyre Geo Sandstone Member.
Thickness: 24m at Lang Geo (ND 1841 9912), Hoy Island, Orkney.
Geographical Limits: Orkney Islands.
Parent Unit: Hoy Sandstone Formation (HOY)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Cliff section at Lang Geo, Hoy Island, Orkney. 
Reference(s):
McAlpine, A, 1978. The Upper Old Red Sandstone of Orkney, Caithness and adjacent areas. PhD Thesis, University of Newcastle-upon-Tyne. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S117 S117