The BGS Lexicon of Named Rock Units — Result Details

Traeth Bach Formation

Computer Code: TRBB Preferred Map Code: notEntered
Status Code: Full
Age range: Pridoli Epoch (SO) — Lochkovian Age (DO)
Lithological Description: Red calcrete-rich siltstone with minor limestone, extraformational conglomerate and thin pebbly sandstone.
Definition of Lower Boundary: Overlies the Bodafon Formation (BODA).
Definition of Upper Boundary: Overlain by / lateral facies change with Porth-y-Mor Formation (PYMB).
Thickness: 130 m.
Geographical Limits: Anglesey.
Parent Unit: Brynrefail Group (BRYF)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
none recorded or not applicable
Reference(s):
House, M R, Richardson, J B, Chaloner, W G, Allen, J R L, Holland, C H and Westoll, T S. 1977. A Correlation of Devonian rocks of the British Isles. Geological Society of London, Special Report No.8, Scottish Academic Press, Edinburgh. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable