The BGS Lexicon of Named Rock Units — Result Details
Dyffryn Flags Facies (Caban Conglomerate Formation)
Computer Code: | DFN | Preferred Map Code: | Dfn |
---|---|---|---|
Status Code: | Pending Upgrade | ||
Age range: | Hirnantian Age (OH) — Llandovery Epoch (SL) | ||
Lithological Description: | Interbedded turbidite mudstones, laminated hemipelagites and abundant thin turbidite sandstones. | ||
Definition of Lower Boundary: | Not defined | ||
Definition of Upper Boundary: | Not defined. | ||
Thickness: | Not defined. | ||
Geographical Limits: | Central Wales. | ||
Parent Unit: | Caban Conglomerate Formation (CBN) | ||
Previous Name(s): | Dyffryn Flags Facies Formation [Obsolete Name and Code: Use DFN]
(-3357)
Dyffryn Flags Facies [Obsolete Name and Code: Use DFN] (-4603) Dyffryn Flags [Obsolete Name and Code: Use DFN] (-1497) |
||
Alternative Name(s): | none recorded or not applicable | ||
Stratotypes: | |||
Type Section | Stream section on north-west slope of Gwastaden Hill, Rhayader. Stream termed the 'Prysg Stream' by Lapworth, (1900). | ||
Reference(s): | |||
Lapworth, H, 1900. The Silurian sequence at Rhayader. Quarterly Journal of the Geological Society, Vol.56, p.67-137. | |||
1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
E179 |