The BGS Lexicon of Named Rock Units — Result Details

Superstes Mudstone Formation [Duplicate Code: Use SMU]

Computer Code: SUM Preferred Map Code: SMU
Status Code: Pending Upgrade
Age range: Caradoc Series (O4) — Caradoc Series (O4)
Lithological Description: Mudstone.
Definition of Lower Boundary: Interfingers with Benan Conglomerate. Also rests conformably on Stinchar Limestone.
Definition of Upper Boundary: Overlain/interfingers with Benan Conglomerate.
Thickness: 0 to 25m
Geographical Limits: Girvan area, southwest Scotland.
Parent Unit: Barr Group (BARR)
Previous Name(s): Didymograptus Shales (-1832)
Didymograptus Superstes Mudstones (-4889)
Alternative Name(s): none recorded or not applicable
Stratotypes:
none recorded or not applicable
Reference(s):
Lapworth, C, 1882. The Girvan Succession. Quarterly Journal of the Geological Society of London, Vol. 38, 537-666. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S008