The BGS Lexicon of Named Rock Units — Result Details

Jubilation Member

Computer Code: JBL Preferred Map Code: JBL
Status Code: Full
Age range: Caradoc Series (O4) — Caradoc Series (O4)
Lithological Description: Calcareous silty mudstone containing a brachiopod and trilobite fauna; carbonate content concentrated in bands.
Definition of Lower Boundary: Succeeds the 15cm calcareous sandstone (the Separation Sandstone Bed) that separates the Jubilation Member from the underlying poorly-bedded mudstone with decalcified limestone nodules of the Gorse Member of the Doularg Formation.
Definition of Upper Boundary: Faulted.
Thickness: At least 13m
Geographical Limits: Girvan area, southwest Scotland.
Parent Unit: Doularg Formation (DOUL)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Type Section  Plantation Burn, Doularg Hill, c.1km eastnortheast of Doularg Farm. Ingham and Tripp, 1991. 
Ingham, J K and Tripp, R P. 1991. The trilobite fauna of the Middle Ordovician Doularg Formation of the Girvan district, Scotland and its palaeoenvironmental significance. Transactions of the Royal Society of Edinburgh, Vol.82 (1), p. 27 - 54. 
Tripp, R P. 1965. Trilobites from the Albany division (Ordovician) of the Girvan district, Ayrshire. Palaeontology, Vol.8, 577-603. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable