The BGS Lexicon of Named Rock Units — Result Details

Exe Breccia Formation

Computer Code: EBR Preferred Map Code: notEntered
Status Code: Full
Age range: Cisuralian Epoch (PLC) — Cisuralian Epoch (PLC)
Lithological Description: A red breccia containing clasts from 30 - 100mm in diameter, in a silty sandy matrix, with cross-bedded and planar-bedded sandstone sets up to 3m thick. Breccia clasts include sandstone, slate and quartz porphry.
Definition of Lower Boundary: Overlies and interdigitates with the Dawlish Sandstone Formation, which is essentially a red sandstone in planar- or cross-bedded units with sparse pebble seams.
Definition of Upper Boundary: Disconformable with the overlying Exmouth Mudstone and Sandstone Formation, which comprises predominantly thick units of red-brown mudstone with sporadic sandstone beds.
Thickness: 85m
Geographical Limits: Newton Abbot District, Devon.
Parent Unit: Exeter Group (EXE)
Previous Name(s): EXE BRECCIA (EBR)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Partial Type Section  Disused quarry near Dawlish Warren, Devon. 
Partial Type Section  Cliffs bordering the Exe Estuary at Lympstone. 
Reference(s):
Selwood, E B, Edwards, R A, Simpson, S, Chesher, J A, Hamblin, R J O, Hanson, M R, Riddolls, B W and Waters, R A. 1984. Geology of the countryside around Newton Abbot. Memoir of the British Geological Survey, Sheet 339. 
Henson, M R, Not published. The Permo-Triassic rocks of south Devon. Unpublished Ph.D. Thesis (1971). University of Exeter. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E339