The BGS Lexicon of Named Rock Units — Result Details

Bay Member

Computer Code: BAY Preferred Map Code: BAY
Status Code: Full
Age range: Streffordian Stage (OX) — Streffordian Stage (OX)
Lithological Description: Sandstone and dark grey graptolitic shale.
Definition of Lower Boundary: Distinguished from the rest of the Ardwell Farm Formation below, by the incoming of dark grey graptolite-bearing shale.
Definition of Upper Boundary: Overlain by the South Shore Formation of the Whitehouse Subgroup.
Thickness: At least 45m
Geographical Limits: The Girvan area of southwest Scotland.
Parent Unit: Ardwell Farm Formation (ARD)
Previous Name(s): Whitehouse Beds (-1331)
Alternative Name(s): Ardwell Flags Formation (Topmost Beds)
Cascade Member
Stratotypes:
Type Section  The northwest side of Ardwell Bay, 4km southwest of Girvan. Ingham. In: Lawson and Weedon, 1992, p.399. 
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. 
Ingham, J K. 1992. Excursion 30: Girvan Foreshore. 396-416 in Lawson, J D and Weedon, D S (editors), Geological Excursions around Glasgow and Girvan. Geological Society of Glasgow. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable