The BGS Lexicon of Named Rock Units — Result Details

North Esk Formation [Not Same As NES]

Computer Code: NOE Preferred Map Code: litho
Status Code: Full
Age range: Tremadoc Series (O1) — Abereiddian Stage (O2)
Lithological Description: Three lithologies with oceanic affinities are juxtaposed: (i) metabasalt, commonly spilitised, locally retaining pillows, metamorphosed to chlorite-schist over much of the outcrop; (ii) chert, brownish, pyritic in places, with cavities filled with yellow limonite; (iii) black slaty pelite rich in iron oxides, weathering reddish away from stream sections.
Definition of Lower Boundary: No lower stratigraphical boundary identifiable.
Definition of Upper Boundary: Unconformably overlain by Margie Formation.
Thickness: Outcrop belt 600m wide: thickness unknown.
Geographical Limits: Occurs in several fault-bounded pods just north of the Highland Boundary Fault between Glen Sannox (Arran) and Garron Point (Stonehaven).
Parent Unit: Highland Border Complex (HBX)
Previous Name(s): Jasper And Green-Rock Series (-2340)
Volcanic Rocks And Black Shales (Highland Border Complex) [Obsolete Name And Code: Use NOE] (DCHV)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Section in R. North Esk from Rocks of Solitude to the "Green Conglomerate", c. 1.25km south of Auchmull. 
Reference(s):
Gould, D, 2001. Geology of the Aboyne district. Memoir of the British Geological Survey, Sheet 66W (Scotland). 
Barrow, G, 1901. On the occurrence of Silurian (?) rocks in Forfarshire and Kincardineshire along the eastern border of the Highlands. Quarterly Journal of the Geological Society of London, Vol.57, p.328-345. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S066 S030 S038 S066 S067