The BGS Lexicon of Named Rock Units — Result Details

Balgaverie Member

Computer Code: BGA Preferred Map Code: BGA
Status Code: Full
Age range: Streffordian Stage (OX) — Streffordian Stage (OX)
Lithological Description: A suite of fossiliferous channel-fill sandstones in the upper part of the (silty-)mudstone-dominated Myoch Formation, containing distinctive late Caradoc shelly fossils.
Definition of Lower Boundary: Base of sandstone lithology overlying dominantly silty mudstones of the enclosing undifferentiated Myoch Formation.
Definition of Upper Boundary: Taken at the top of the sandstone lithology beneath the overlying dominantly silty mudstones of the enclosing undifferentiated Myoch Formation.
Thickness: About 8m
Geographical Limits: The Girvan area of southwest Scotland.
Parent Unit: Myoch Formation (MYO)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Penwhapple Burn, 6km east of Girvan. 
Reference(s):
Fortey, R A, Harper, D A T, Ingham, J K, Owen, A W, Parkes, M A, Rushton, A W A and Woodcock, N H. 2000. A revised correlation of Ordovician rocks in the British Isles. Geological Society Special Report, No.24, pp.41-47. 
Lapworth, C, 1882. The Girvan Succession. Quarterly Journal of the Geological Society of London, Vol. 38, 537-666. 
Williams, A, 1962. The Barr and Lower Ardmillan Series (Caradoc) of the Girvan district, southwest Ayrshire, with descriptions of the Brachiopoda. Memoir of the Geological Society of London, No.3. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable