The BGS Lexicon of Named Rock Units — Result Details

Orroland Member

Computer Code: ORR Preferred Map Code: ORR
Status Code: Full
Age range: Chadian Substage (CI) — Chadian Substage (CI)
Lithological Description: Conglomerates, conglomeratic sandstones, red siltstones, marls and cornstones.
Definition of Lower Boundary: Faulted.
Definition of Upper Boundary: Faulted.
Thickness: c.280m
Geographical Limits: Coastal section from Port Mary to Castle Muir.
Parent Unit: Ballagan Formation (BGN)
Previous Name(s): Orroland Formation (-436)
Orroland Group (-3598)
Orroland Limestone Beds (-2965)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Coastal section from Port Mary to Castle Muir. 
Reference(s):
Craig, G Y and Nairn, A E M. 1956. The Lower Carboniferous outliers of the Colvend and Rerrick shores, Kirkcudbrightshire. Geological Magazine, Vol.93, 249-256. 
Lintern, B C and Floyd, J D. 2000. Geology of the Kirkcudbright-Dalbeattie District. Memoir of the British Geological Survey, Sheets 5W, 5E and part of 6W (Scotland). 
Deegan, C E. 1973. Tectonic control of sedimentation at the margin of a Carboniferous depositional basin in Kirkcudbrightshire. Scottish Journal of Geology, Vol. 9, p. 1 - 28. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S005 S005