The BGS Lexicon of Named Rock Units — Result Details

Oronsay Greywacke Formation

Computer Code: ORGW Preferred Map Code: symb
Status Code: Pending Upgrade
Age range: Neoproterozoic Era (AZ) — Neoproterozoic Era (AZ)
Lithological Description: Psammite and semipelite.
Definition of Lower Boundary: none recorded or not applicable
Definition of Upper Boundary: none recorded or not applicable
Thickness: none recorded or not applicable
Geographical Limits: none recorded or not applicable
Parent Unit: Colonsay Group (COSY)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
none recorded or not applicable
Reference(s):
Bentley, M R, 1988. The Colonsay Group. 119-130 in Later Proterozoic stratigraphy of the Northern Atlantic regions. Winchester, J A (Editor). (Glasgow and London: Blackie). 
Stewart, A D. 1975. Torridonian rocks of Western Scotland. In Harris, A L, and others. A correlation of the Pre-Cambrian rocks in the British Isles. Geological Society of London, Special Report No.6. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S035