Computer Code: |
DUSP |
Preferred Map Code: |
notEntered |
Status Code: |
Full |
Age range: |
Neoproterozoic Era (AZ)
— Neoproterozoic Era (AZ) |
Lithological Description: |
Metamorphosed lavas and pyroclastic rocks. The spilites are intercalated with metasediments, mainly graphitic phyllites, quartzites and cherts. |
Definition of Lower Boundary: |
Drawn at base of meta-spilite of the Dunrossness Spilitic Formation where it rests conformably on pelitic wacke interpreted to belong to the Dunrossness Phyllitic (Formation). |
Definition of Upper Boundary: |
Drawn at unconformable upward passage from meta-spilite of the Dunrossness Spilitic Formation to the Old Red Sandstone. |
Thickness: |
Approximately 1000 m. |
Geographical Limits: |
Shetlands, Scotland. |
Parent Unit: |
Clift Hills 'Division' (DCF)
|
Previous Name(s): |
Dunrossness Spilitic Group [Obsolete Name and Code: Use DUSP]
(-2159)
|
Alternative Name(s): |
none recorded or not applicable
|
Stratotypes: |
Type Area |
Aith Voe, Shetland, Scotland. |
Reference(s): |
Harris, A L and others, 1973. A correlation of the Pre-Cambrian rocks in the British Isles. Geological Society of London Special Report No 6. |
Flinn, D, and others, 1972. A revision of the stratigraphic succession of the East Mainland of Shetland. Scottish Journal of Geology, Vol.8, p. 335-343. |
Mykura W, 1976 British Regional Geology: Orkney and Shetland (HMSO, Edinburgh).] |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
S126
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