The BGS Lexicon of Named Rock Units — Result Details

Llanddewi Glacigenic Formation

Computer Code: LITI Preferred Map Code: notEntered
Status Code: Full
Age range: Pleistocene Epoch (QP) — Pleistocene Epoch (QP)
Lithological Description: Deeply weathered sand and gravel and red clay (till). Erratics include both Welsh sandstone boulders (Millstone Grit Group, Namurian) and clasts of Irish Sea provenance (George, 1933)
Definition of Lower Boundary: Unconformable contact with bedrock (limestone of the Pembroke Limestone Group, Dinantian)
Definition of Upper Boundary: Overlain by reworked sands and gravels or at ground surface
Thickness: none recorded or not applicable
Geographical Limits: South and west Gower
Parent Unit: Albion Glacigenic Group (ALBI)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Reference Section  Hills Farm Borehole, Port Eynon, on the crest of the Paviland Moraine 21.5m of deeply weathered sand and gravel on 1.5 m of red clay (Bowen, 1999; Bowen p. 148 in Lewis and Richards, 2005) 
Reference Section  Hangman's Cross Borehole, Oxwich 10m of gravel (Bowen, p. 148 in Lewis and Richards, 2005) 
Bowen, D Q. 1999. A revised correlation of Quaternary deposits in the British Isles. Geological Society Special Report, No. 23. 
Bowen, D Q. 2005. South Wales. In Lewis, C A and Richards, A E (editors), The glaciations of Wales and adjacent areas. (Logaston Press.) 
George, T N. 1933. The glacial deposits of Gower. Geological Magazine, Vol. 70, 208-232. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable