| Computer Code: |
SGTU |
Preferred Map Code: |
SGTM |
| Status Code: |
Full |
| Age range: |
Givetian Age (DV)
— Givetian Age (DV) |
| Lithological Description: |
Carbonate cemented basic lava and hyaloclastite fragments, massive basic lava and bedded lithic tuffs. |
| Definition of Lower Boundary: |
Conformable with slate and mudstone of undivided Saltash Formation below. |
| Definition of Upper Boundary: |
Conformable with slate and mudstone of undivided Saltash Formation above. |
| Thickness: |
Up to 175m. |
| Geographical Limits: |
Liskeard to Plymouth. |
| Parent Unit: |
Saltash Formation (SAH)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
River cliff. River Lynher, 1.25km east-south-east of St Germans. |
| Reference(s): |
| Leveridge B E, Holder, M T, Goode, A J J, Scrivener R C, Jones N S and Merriman, R J. 2002. Geology of the Plymouth and south-east Cornwall area. Memoir of the British Geological Survey, Sheet 348 (England and Wales). |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E348
E349
|
