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
|