| 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
|
