The BGS Lexicon of Named Rock Units — Result Details

Wether Law Linn Formation

Computer Code: WLN Preferred Map Code: WLN
Status Code: Full
Age range: Telychian Age (ST) — Sheinwoodian Age (SS)
Lithological Description: Silty mudstone, mudstone, siltstone and fine-grained sandstones.
Definition of Lower Boundary: Conformable: green-grey bioturbated mudstones immediately overlying medium- to coarse-grained sandstones of the Cock Rig Formation.
Definition of Upper Boundary: Conformable: highest red, poorly lithified shales below coarse-grained sandstones of the Henshaw Formation.
Thickness: 230-265m
Geographical Limits: Pentland Hills, Midland Valley.
Parent Unit: North Esk Group (NSK)
Previous Name(s): Beds D To H (-614)
Bed C (-3303)
Beds At D To H (-3134)
Fossiliferous Mudstones And Siltstones (-3135)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Wether Law Linn (south bank), 130 to 330m upstream of confluence with North Esk river 
Partial Type Section  North Esk River and Henshaw Burn, from 200m downstream of confluence to 110m upstream from confluence. 
Partial Type Section  Top of Cockrig Formation and base of Wether Law Linn Formation, Lynslie Burn, 920m south of Wether Law summit. 
Reference(s):
Henderson, J and Brown, D J, 1870. On the Silurian rocks of the Pentland Hills. Transactions of the Edinburgh Geological Society, Vol.1, 266-272. 
Lamont, A, 1952. Ecology and correlation of the Pentlandian - a new division of the Silurian System in Scotland. 27-32 in Faunal and floral facies and zonal correlation. Dighton-Thomas, H (editor). Report of the 18th Session of the International Geological Congress, Great Britain, 1948, Pt.10. 
Robertson, G, 1986. North Esk Inlier. 174-185 in Lothian Geology. An Excursion Guide. McAdam, A D and Clarkson, E N K (editors). [Edinburgh: Scottish Academic Press.] 
Howell, H H and Geikie, A, 1861. The Geology of the neighbourhood of Edinburgh (1st edition). Memoir of the Geological Survey, Scotland. 
Robertson, G, 1989. A palaeoenvironmental interpretation of the Silurian rocks in the Pentland Hills, near Edinburgh, Scotland. Transactions of the Royal Society of Edinburgh: Earth Sciences, Vol.80, 127-141. 
Tipper, J C, 1976. The stratigraphy of the North Esk Inlier. Scottish Journal of Geology, Vol.12, Pt, 15-22. 
Mitchell, G H. 1962. The geology of the neighbourhood of Edinburgh. (Explanation of Sheet 32) Third Edition. (Reprinted 1980). Memoir of the Geological Survey of Great Britain (Scotland). 
Peach, B N and Horne, J. 1899. The Silurian Rocks of Britain, Volume 1. Scotland. Memoir of the Geological Survey of the United Kingdom. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S032 S024