The BGS Lexicon of Named Rock Units — Result Details

Priesthill Group [Cf Hagshaw Group]

Computer Code: PRH Preferred Map Code: notEntered
Status Code: Full, pending ratification
Age range: Llandovery Epoch (SL) — Wenlock Epoch (SW)
Lithological Description: Greywackes, sandstones, siltstones and mudstones with sporadic carbonaceous silty layers. (Correlative of Priesthill Group = Hagshaw Group.)
Definition of Lower Boundary: Drawn at base of greywackes of the Patrickburn Formation where it rests on the Ordovician.
Definition of Upper Boundary: Drawn at conformable upward passage from sandstones of the Dunside Formation to sandstone of the Passage Formation of the Waterhead Group.
Thickness: 750m approx.
Geographical Limits: Midland valley, Strathclyde, Scotland.
Parent Unit: Not Applicable (-)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Lesmahagow, Strathclyde, Scotland. 
Reference(s):
Cameron, I B and Stephenson, D, 1985. British Regional Geology: The Midland Valley of Scotland (3rd Edition). (London: HMSO for British Geological Survey). 
Geikie, A, 1873. Lanarkshire: Central Districts. Memoirs of the Geological Survey of Scotland. 
Walton, E K. 1983. Lower Palaeozoic - Stratigraphy. In Craig, G Y (editor), Geology of Scotland (2nd edition)(Edinburgh: Scottish Academic Press.) 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable