The BGS Lexicon of Named Rock Units — Result Details

Clift Hills Phyllite Group [Obsolete Code: Use CLHI]

Computer Code: DBHP Preferred Map Code: notEntered
Status Code: Index Level
Age range: Neoproterozoic Era (AZ) — Neoproterozoic Era (AZ)
Lithological Description: Colour banded semi-pelitic phyllite with intercalations of quartzite. Laminated phyllites contain muscovite and some are graphitic. Thick units of coarse, feldspathic grit occur.
Definition of Lower Boundary: Drawn at base of pelite and semi-pelite of the Clift Hills Phyllitic Group where it rests conformably on meta-spilite of the Asta Spilitic Group.
Definition of Upper Boundary: Drawn at conformable upward passage from semi-pelite and pelite of the Clift Hills Phyllitic Group to pelitic wacke of the Dunrossness Phyllitic Group.
Thickness: 2300m approx.
Geographical Limits: Shetlands, Scotland.
Parent Unit: Not Entered (?)
Previous Name(s): Clift Hills Phyllite (-847)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Clift Hills, Shetland, Scotland. 
Reference(s):
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:
none recorded or not applicable