The BGS Lexicon of Named Rock Units — Result Details

Dingle Mudstone Member

Computer Code: DIM Preferred Map Code: DIM
Status Code: Full
Age range: Gorstian Age (SG) — Gorstian Age (SG)
Lithological Description: Mudstone, homogeneous, medium-grey with common thin (<05cm) fine-grained sandstone layers. Commonly parallel laminated.
Definition of Lower Boundary: Passage down into fissile largely hemipelagic Gyfennie Wood Shales Member of the Nantglyn Flags Formation.
Definition of Upper Boundary: At abrupt onset of thicker (>30cm) fine-grained sandstones, commonly defined also by a lenticular bed of intraformational conglomerate.
Thickness: 0-150m.
Geographical Limits: Around Newtown.
Parent Unit: Bailey Hill Formation (BAI)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Reference Section  As type section. Also complete thickness in farm track (top c.[SO 1417 9540], base c.[1433 9551]) 370m, on 047 degrees from Bryn-rorin farm house, near Betws Cedewain, Newtown. 
Type Section  Cutting behind house at north end of Dingle, base of section (1074 9024) 835m, on 174 degrees from Dolfor Road Railway Bridge, Newtown. 
none recorded or not applicable
1:50K maps on which the lithostratigraphical unit is found, and map code used: