The BGS Lexicon of Named Rock Units — Result Details

Orknagable Formation

Computer Code: ORKG Preferred Map Code: notEntered
Status Code: Full
Age range: Tonian Period (AT) — Tonian Period (AT)
Lithological Description: Psammite, variably gneissose, with minor quartzite and pelite.
Definition of Lower Boundary: Not exposed; unknown.
Definition of Upper Boundary: Likely overlain by North Holm Gneiss Formation (NHGN).
Thickness: none recorded or not applicable
Geographical Limits: NE Shetland: Unst, Fetlar, Linga.
Parent Unit: Westing Group (WEGP)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
none recorded or not applicable
Reference(s):
Krabbendam, M. 2021. A stratigraphic framework for the early Neoproterozoic successions of the Northern Highlands of Scotland. UK Stratigraphic Framework Series. British Geological Survey Open Report, OR/21/072. 86pp. 
Flinn, D. 2014. Geology of Unst, Fetlar and adjacent islands. Memoir of the British Geological Survey, Sheets 131 and part of 130, Scotland. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S131