The BGS Lexicon of Named Rock Units — Result Details

Harra Ebb Sandstone Formation

Computer Code: HAE Preferred Map Code: HaE
Status Code: Full
Age range: Early Devonian Epoch (DL) — Early Devonian Epoch (DL)
Lithological Description: Interbedded sandstones and siltstones with tongues and lenses of breccia and conglomerate.
Definition of Lower Boundary: Unconformably lies on Moinian basement.
Definition of Upper Boundary: Not known - in fault contact with Qui Ayre Sandstone Formation.
Thickness: 100m at Harra Ebb NY 215 148 Mainland, Orkney.
Geographical Limits: Orkney Islands.
Parent Unit: Yesnaby Sandstone Group (YES)
Previous Name(s): Basal Breccia And Sandstone (-4693)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Cliff section at Harra Ebb western Mainland Orkney. 
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:
S119