Computer Code: |
BTM |
Preferred Map Code: |
notEntered |
Status Code: |
Pending Upgrade |
Age range: |
Asbian Substage (CR)
— Asbian Substage (CR) |
Lithological Description: |
Porcellanous limestones (calcite mudstones) with spar filled fenestrae; intercalated thin dark grey shales. |
Definition of Lower Boundary: |
Rests on skeletal and peloidal limestones of the lower parts of the Tandinas Limestone. |
Definition of Upper Boundary: |
Overlain by the Penmon Limestone (massive and rubbly skeletal limestones). |
Thickness: |
4 metres; up to 11 metres at Tandinas Quarry and 8.5 metres at Flagstaff Quarry. |
Geographical Limits: |
Not defined. |
Parent Unit: |
Leete Limestone Formation (LEEL)
|
Previous Name(s): |
none recorded or not applicable
|
Alternative Name(s): |
none recorded or not applicable
|
Stratotypes: |
Type Area |
Hillside below Bryn Tiriom Farmhouse, Sheet 94. |
Reference(s): |
none recorded or not applicable |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
E094
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