The BGS Lexicon of Named Rock Units — Result Details

Rhynie Chert Member

Computer Code: RHNC Preferred Map Code: RHNC
Status Code: Pending Upgrade
Age range: Pragian Age (DP) — Pragian Age (DP)
Lithological Description: Chert with plant remains, with minor interbedded cherty sandstones.
Definition of Lower Boundary: Lower boundary is where cherty material overlies weathered shales.
Definition of Upper Boundary: Upper boundary where succeeded by argillaceous and arenaceous rocks.
Thickness: 2.23 metres in Trench No.3; 2.36 metres in Trench No.1.
Geographical Limits: Not defined.
Parent Unit: Dryden Flags Formation (DRY)
Previous Name(s): Rhynie Chert Formation [Obsolete Name And Code: See RHNC] (RCF)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  40 metres south-south-west of Windyfield, near Rhynie, Sheet 76W, Scotland. 
Reference(s):
Mackie, W. 1914. The rock series of Craigbeg and Ord Hill, Rhynie, Aberdeenshire. Transactions of the Geological Society of Edinburgh, Vol. 10, p. 205-236. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S076