| 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 [Obsolete Name and Code: Use EBR]
(-2165)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Partial Type Section |
Disused quarry near Dawlish Warren, Devon. Selwood et al., 1984. Shows up to 9m of interbedded planar breccia units with planar-bedded red-brown sandstone. |
| Partial Type Section |
Cliffs bordering the Exe Estuary at Lympstone. Selwood et al., 1984. Section shows planar-bedded units dipping at 9 degrees, and striking at 059 degrees. Section thickness not recorded. |
| Reference(s): |
| Henson, M R, 1971. The Permo-Triassic rocks of south Devon. Unpublished PhD Thesis, University of Exeter. |
| Selwood, E B, Edwards, R A, Simpson, S, Chesher, J A, Hamblin, R J O, Henson, 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 (England and Wales). |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E339
|
