Computer Code: |
CBT |
Preferred Map Code: |
CBT |
Status Code: |
Pending Upgrade |
Age range: |
Lochkovian Age (DO)
— Pragian Age (DP) |
Lithological Description: |
Conglomerate, with rounded quartzite cobbles, reddened on the outside, set in a silty, or in places calcareous, matrix. |
Definition of Lower Boundary: |
Unconformity on Dalradian metasediments and Caledonian plutonic rocks. |
Definition of Upper Boundary: |
Transition from conglomerate to shale. |
Thickness: |
Approx. 10 metres in type section, probably increasing southwards to 15 - 20 metres on Glaschul Hill (NJ 458 149). |
Geographical Limits: |
Not defined. |
Parent Unit: |
Rhynie Group (RHN)
|
Previous Name(s): |
none recorded or not applicable
|
Alternative Name(s): |
none recorded or not applicable
|
Stratotypes: |
Type Area |
Corbie's Tongue, Sheet 76W, Scotland. |
Reference(s): |
Wilson, J S G. 1890. Explanation of Sheet 76 Central Aberdeenshire. Memoir of the Geological Survey (Scotland). |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
S076
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