The BGS Lexicon of Named Rock Units — Result Details

Logan Formation

Computer Code: LOGF Preferred Map Code: LOGF
Status Code: Full
Age range: Wenlock Epoch (SW) — Wenlock Epoch (SW)
Lithological Description: Greyish red or pale brown sandstones and beds of greyish red silty mudstone.
Definition of Lower Boundary: Conformable transition from greenish grey sandstones and siltstone of Slot Burn Formation.
Definition of Upper Boundary: Unconformable junction with overlying conglomerate of the Middlefield Conglomerate Formation.
Thickness: 250m
Geographical Limits: Muirkirk to Strathaven area, Strathclyde region, Central Scotland.
Parent Unit: Waterhead Group (Cf Glenbuck Group) (WHD)
Previous Name(s): Logan Water Beds [Obsolete Name And Code: Use LOGF] (LOW)
Alternative Name(s): none recorded or not applicable
Partial Type Section  Sections in Regal Water. 
Walton, E K, 1965. "In" Craig, G Y, (Editor). The Geology of Scotland: Lower Palaeozoic rocks. Oliver and Boyd, Edinburgh, 161-227. 
Jennings, J S. Not published. The geology of the eastern part of the Lesmahagow Inlier. Ph.D.Thesis, University of Edinburgh, 1961. 
1:50K maps on which the lithostratigraphical unit is found, and map code used: