The BGS Lexicon of Named Rock Units — Result Details

Chapel Point Limestone [Obsolete Name And Code: Use MAHO]

Computer Code: CPLS Preferred Map Code: MAHO
Status Code: Index Level
Age range: Brigantian Substage (CX) — Brigantian Substage (CX)
Lithological Description: A grey, fine-grained, slightly bioclastic,well-bedded limestone with a sandy base, and interpreted to be of marine origin, containing brachiopods and rare rugose corals, crinoids, and commonly Zoophycus caudagalli trace fossils.
Definition of Lower Boundary: Generally a conformable change from a rooted sandstone within the Lower Limestone Formation lying about 20m above the Middle (and Upper Skateraw) Limestone (now named the Blackhall Limestone).
Definition of Upper Boundary: Usually a conformable change to sandstone within the Lower Limestone Formation, which separates this from the Barns Ness Limestone (now the Mid Hosie Limestone) about 10m above,
Thickness: Ranging from 2.4m to 2.9m in East Lothian
Geographical Limits: In East Lothian in the Barns Ness area near Dunbar.
Parent Unit: Lower Limestone Formation (LLGS)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Barns Ness Lighthouse, East Lothian. 
Reference(s):
Davies, A, McAdam, A D and Cameron, I B. 1986. Geology of the Dunbar district. Memoir of the British Geological Survey, Sheet 33E and part of Sheet 41 (Scotland). 
Browne, M A E, Dean, M T, Hall, I H S, McAdam, A D Monro, S K and Chisholm, J I. 1999. A lithostratigraphical framework for the Carboniferous rocks in the Midland Valley of Scotland. British Geological Survey Research Report, RR/99/07. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S033