| Computer Code: |
HICO |
Preferred Map Code: |
HC |
| Status Code: |
Full |
| Age range: |
Permian Period (P)
— Permian Period (P) |
| Lithological Description: |
Lower unit of reddish-brown silt and clayey, very fine-grained sand; middle unit of reddish-brown fine-grained breccia; upper unit of reddish-brown clayey, very fine-grained sand. |
| Definition of Lower Boundary: |
Not seen: faulted. |
| Definition of Upper Boundary: |
Not seen: faulted. |
| Thickness: |
Lower unit at least 30m. Middle unit 7-16m. Upper unit at least 9m. (At least 55m in total.) |
| Geographical Limits: |
Restricted to small fault-bounded outcrop (0.6km squared) between Brook Hill (ST 002 006)in the west, and Higher Comberoy Farm (ST 016 005) in the east, near Clyst St Lawrence, Devon. |
| Parent Unit: |
Exeter Group (EXE)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Higher Comberoy Farm, near Clyst St Lawrence, Devon. Upper unit not exposed; augered around and SW of Higher Comberoy Farm. |
| Reference(s): |
| Edwards, R A, 1988. Geology of the Clyst Hydon District (Devon). British Geological Survey Technical Report, WA/88/4. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
