The BGS Lexicon of Named Rock Units — Result Details

Hagshaw Group

Computer Code: HGW Preferred Map Code: HGW
Status Code: Full
Age range: Llandovery Epoch (SL) — Sheinwoodian Age (SS)
Lithological Description: Grey mudstone, siltstone and turbiditic greywacke.
Definition of Lower Boundary: Faulted out.
Definition of Upper Boundary: Top of Ree Burn Formation (qv). (Base of the Parishholm Conglomerate).
Thickness: 312m+
Geographical Limits: Lower Palaeozoic Inlier of the Hagshaw Hills (50k Sheets 23E, 23W and 15W).
Parent Unit: Not Applicable (-)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Ree Burn section/Douglas Water section, 0.4km south-south-west of Parish Holm Farm. 
Type Section  Smithy Burn section. 250m upstream from junction with the Podowrin Burn. 
Reference(s):
Walton, E K. 1983. Lower Palaeozoic - Stratigraphy. In Craig, G Y (editor), Geology of Scotland (2nd edition)(Edinburgh: Scottish Academic Press.) 
Lawson, J and Lawson, J, 1976. The Southern Uplands and Galloway. "In" Geology explained around Glasgow and south-west Scotland, including Arran. 
Rolfe, W D I, 1961. The Geology of the Hagshaw Hills Silurian Inlier, Lanarkshire. Transactions of the Edinburgh Geological Society, Vol.18, Part 3, 240-269. 
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. 
Rolfe, W D I, 1973. The Hagshaw Hills Silurian Inlier. "In" Bluck, B J, Geology of the Glasgow district. 
Richey, J E, Anderson, E M, and Macgregor, A G. 1930.The geology of north Ayreshire. Memoir of the Geological Survey of Great Britain. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S023 S023 S015