| Computer Code: |
PEL |
Preferred Map Code: |
notEntered |
| Status Code: |
Index Level |
| Age range: |
Asbian Substage (CR)
— Asbian Substage (CR) |
| Lithological Description: |
[Obsolete: use LGHL] Massive to rubbly pale skeletal limestones with intercalated ochreous weathering, thin, clay palaeosol horizons; a widely recognised 3m-thick shale bed occurs 20m above the base of the formation. |
| Definition of Lower Boundary: |
Lower contact taken at the top of the uppermost porcellanous limestone of the Bryn Tirion Member. |
| Definition of Upper Boundary: |
Upper contact taken at the palaeosol immediately below the lowest argillaceous units of the succeeding Traeth Bychan Limestone. |
| Thickness: |
75m |
| Geographical Limits: |
Not defined. |
| Parent Unit: |
none recorded or not applicable
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Penmon and Flagstaff Quarries, Sheet 94. |
| Reference(s): |
| Power, G M. Not published. The Stratigraphy and Sedimentology of the Lower Carboniferous in Anglesey, with special reference to rocks of Asbian(DI) age. Ph.D. Thesis, Queen's University, Belfast, 1977. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E094
|
