The BGS Lexicon of Named Rock Units — Result Details
Aughnacloy Sandstone Formation
Computer Code: | ACSF | Preferred Map Code: | notEntered |
---|---|---|---|
Status Code: | Pending Upgrade | ||
Age range: | Holkerian Substage (CQ) — Asbian Substage (CR) | ||
Lithological Description: | A pale grey, medium-grained, parallel laminated, calcareous sandstone, which is ooidal in parts, and locally fossiliferous silty mudstone containing brachiopods and corals. | ||
Definition of Lower Boundary: | Not seen, but it is assumed to be conformable with the calcareous mudstones and thin interbedded limestones of the underlying Benbulben Shale Formation. | ||
Definition of Upper Boundary: | Not seen, but seems to be conformable with the overlying Maydown Limestone Formation. | ||
Thickness: | From 160 m - 300 m thick. | ||
Geographical Limits: | Counties Armargh and Tyrone, Northern Ireland. | ||
Parent Unit: | Tyrone Group (TYRO) | ||
Previous Name(s): | Auchnacloy Sandstone Member [Obsolete Name and Code: Use ACSF]
(-1300)
Aughnacloy Sandstone Member [Obsolete Name And Code: Use ACSF] (ACS) |
||
Alternative Name(s): | none recorded or not applicable | ||
Stratotypes: | |||
none recorded or not applicable | |||
Reference(s): | |||
none recorded or not applicable | |||
1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
N34 N46 |