Computer Code: |
TCD1 |
Preferred Map Code: |
notEntered |
Status Code: |
Full |
Age range: |
Tonian Period (AT)
— Tonian Period (AT) |
Lithological Description: |
Breccio-conglomerate, coarse sandstone; tabular red sandstone in upper part. |
Definition of Lower Boundary: |
Unconformable upon Lewisian Gneiss (L). |
Definition of Upper Boundary: |
Conformably overlain by the Horrisdale Waterfalls Member (TCD2). |
Thickness: |
0-100 m. |
Geographical Limits: |
Northwest Highlands, Diabaig to Gairloch. |
Parent Unit: |
Diabaig Formation (TCD)
|
Previous Name(s): |
none recorded or not applicable
|
Alternative Name(s): |
none recorded or not applicable
|
Stratotypes: |
Type Area |
Diabaig: [NG 797 601 - NG 793 603]. |
Reference(s): |
Stewart, A D. 2002. The later Proterozoic Torridonian rocks of Scotland: their sedimentology, geochemistry and origin. Geological Society Memoir. Vol. 24. (The Geological Society.) |
Krabbendam, M. 2021. A stratigraphic framework for the early Neoproterozoic successions of the Northern Highlands of Scotland. UK Stratigraphic Framework Series. British Geological Survey Open Report, OR/21/072. 86pp. |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
S091
|