The BGS Lexicon of Named Rock Units — Result Details

Millport Cornstones Member

Computer Code: MLC Preferred Map Code: MLC
Status Code: Full
Age range: Chadian Substage (CI) — Chadian Substage (CI)
Lithological Description: Grey sandstone and red-brown silty mudstone with pedogenic limestone.
Definition of Lower Boundary: The base is described as "transitional", indicating that it is likely to be interbedded, with grey mudstone and dolomitic limestone of the Ballagan Formation (Paterson and Hall, 1986), and occurs at crop in Millport Bay [NS 1561 5416]. The lower boundary is conformable (Monro, 1999).
Definition of Upper Boundary: The top is not seen, but is presumed to be overlain by the Eileans Sandstone Member that crops out on The Eileans in Millport Bay (Paterson and Hall, 1986; Monro, 1999).
Thickness: c.70m
Geographical Limits: Cumbrae Islands in Strathclyde, Scotland.
Parent Unit: Clyde Sandstone Formation (CYD)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Millport Bay, Great Cumbrae, Strathclyde, Scotland. Sheet S21E. 
Reference(s):
Monro, S K. 1999. Geology of the Irvine District. Memoir of the British Geological Survey, Sheet 22W and part of 21E (Scotland). 
British Geological Survey. In press. Irvine. Scotland Sheet 22W and part of 21E. Bedrock. 1:50 000 Geology Series. (Keyworth, Nottingham: British Geological Survey.) 
Paterson, I B and Hall, I H S, 1986. Lithostratigraphy of the late Devonian and early Carboniferous rocks in the Midland Valley of Scotland. British Geological Survey Report, 18/3. 
British Geological Survey. In preparation. Dunoon and Millport. Scotland Sheet 29E and part of 21E. Bedrock. 1:50 000 Geology Series. (Keyworth, Nottingham: British Geological Survey.) 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S021 S029