| Computer Code: |
POM |
Preferred Map Code: |
PM |
| Status Code: |
Full |
| Age range: |
Permian Period (P)
— Permian Period (P) |
| Lithological Description: |
Reddish brown mudstone, sandy mudstone and clayey fine-grained sandstone, weathering to clay and clayey sand. |
| Definition of Lower Boundary: |
Sharp lower boundary on fine-medium and coarse-grained, locally pebbly, sandstone. |
| Definition of Upper Boundary: |
Change from predominantly clayey Poltimore Mudstone to overlying sandstones; marked by pronounced feature. |
| Thickness: |
c.15m |
| Geographical Limits: |
Outcrop extends from around Poltimore village [SX 966 970], northeastwards to near Hay House, [SX 986 988], Broadclyst. |
| Parent Unit: |
Dawlish Sandstone Formation (DAS)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Name derived from Poltimore Village (SX 966 970), near Exeter, Devon. Poor exposures around the village. Outcrop mainly determined by augering. |
| Reference(s): |
| Bristow, C R. 1983. Geology of Sheet SX99NE (Broad Clyst, Devon). Geological Report for DOE: Land Use Planning. (Exeter: Institute of Geological Sciences.) |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
