| Computer Code: |
TALS |
Preferred Map Code: |
TS |
| Status Code: |
Pending Upgrade |
| Age range: |
Ashgill Series (OA)
— Ashgill Series (OA) |
| Lithological Description: |
The Taliaris Formation comprises locally slumped and destratified, thin to thick bedded, medium- to coarse-grained turbidite sandstone with subordinate turbidite and hemipelagic mudstone and impersistant conglomeratic units. |
| Definition of Lower Boundary: |
In the type area, the formation rests upon grey, burrow-mottled mudstones of the Nantmel Mudstones Formation. The lower boundary is typically gradational and is taken where the proportion of thin beds of turbidite sandstone exceed approximately 15% of the formation, which generally coincides with the incoming of thick sandstone beds or, more rarely, conglomerate beds. The contact is not exposed. |
| Definition of Upper Boundary: |
The formation is overlain by grey, burrow-mottled mudstones of the Nantmel Mudstones Formation. The upper boundary is gradational and is taken where beds of turbidite sandstone makes up less than 15% of the formation, generally coincident with the last thick bed of turbidite sandstone or conglomerate. The contact is not exposed. |
| Thickness: |
To 370m |
| Geographical Limits: |
The Taliaris Formation crops out principally on the rugged hilltops flanking the Dulais valley, north of the town of Llandeilo in Carmarthenshire. It is preserved in the hinge and limbs of a northeast-trending anticline. |
| Parent Unit: |
Not Available (!)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Characteristic exposures of the Taliaris Formation crop out on the hill tops around Taliaris Park. In particular in the fields around and to the northwest of Maes-y-Castell. |
| Reference(s): |
| none recorded or not applicable |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
