The BGS Lexicon of Named Rock Units — Result Details

Deerhope Formation

Computer Code: DHP Preferred Map Code: DHP
Status Code: Full
Age range: Telychian Age (ST) — Telychian Age (ST)
Lithological Description: Laminated fossiliferous siltstones, mudstones and shales, no sediment coarser than siltstone, bioturbation common in fine-grained sediment. Fossils include rugose corals, brachiopods, bivalves, trilobites and pelmatozoans.
Definition of Lower Boundary: Conformable: at grey shales overlying highest Reservoir Formation, sandy siltstone.
Definition of Upper Boundary: Conformable: red shales immediately underlying lowest Cock Rig Formation, medium-grained sandstones.
Thickness: 390m in North Esk Inlier
Geographical Limits: Pentland Hills, Midland Valley.
Parent Unit: North Esk Group (NSK)
Previous Name(s): Upper Part Of Reservoir Formation And Lower Part Of Deerhope Formation (-3360)
Deerhope Burn Flagstones [Obsolete Name And Code: Use DHP] (DHPF)
Deerhope Siltstones [Obsolete Name And Code: Use DHP] (DHPS)
Upper Part Of Bed A (-2151)
Upper Part Of Beds At B (-1500)
Upper Part Of Reservoir Beds And Deerhope Burn Flagstones (-1501)
Upper Part Of Bed B (-210)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Deerhope Burn, 700-1000m west of North Esk river. 
Partial Type Section  North Esk river, 130m upstream of North Esk Reservoir. Boundary of Reservoir Formation and Deerhope Formation. 
Reference Section  North Esk river, 500m upstream of reservoir. 
Reference(s):
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.] 
Tipper, J C, 1976. The stratigraphy of the North Esk Inlier. Scottish Journal of Geology, Vol.12, Pt, 15-22. 
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. 
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. 
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). 
Howell, H H and Geikie, A, 1861. The Geology of the neighbourhood of Edinburgh (1st edition). Memoir of the Geological Survey, 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