The BGS Lexicon of Named Rock Units — Result Details

Bishop's Frome Limestone Member
Computer Code: BFLS Preferred Map Code: BFL
Status Code: Full
Age range: Silurian Period (S) — Devonian Period (D)
Lithological Description: Rubbly, massive to nodular limestone-calcrete palaeosol horizons.
Definition of Lower Boundary: Placed at base of thick mature calcrete, overlying red mudstones.
Definition of Upper Boundary: Placed at top of thick mature calcrete, above which sandstones of the overlying St.Maughans Formation appear.
Thickness: 2 - 5m, locally up to 8m.
Geographical Limits: Hereford-Worcester-Tewkesbury districts, but may equate with 'Psammosteus' Limestone(s) present throughout Wales and the Welsh Borderland.
Parent Unit: Raglan Mudstone Formation (RG)
Previous Name(s): Psammosteus Limestone (-692)
Psammosteus Limestone [Obsolete Name And Code: Use BFLS] (PSL)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Village of Bishop's Frome, Herefordshire. 
Reference(s):
Brandon, A. 1989. Geology of the country between Hereford and Leominster. Memoir for 1:50 000 Geological Sheet 198. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E198 E216 E263 E199 E214
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