The BGS Lexicon of Named Rock Units — Result Details

Jackie Parr Limestone Formation

Computer Code: JPLS Preferred Map Code: JKP
Status Code: Full
Age range: Late Devonian Epoch (DU) — Tournaisian Stage (CT)
Lithological Description: Interbedded limestone and sandstone sequence with subordinate dolomite, pebbly sandstone and claystone. Heavily pedogenic. Sandstone variable composition; limestone typically packstone or grainstone.
Definition of Lower Boundary: Proved in boreholes only. Thought to be possibly unconformable or transitional. The boundary is taken at the top of the lowermost limestone above a sandstone-dominated sequence of the Village Farm Formation.
Definition of Upper Boundary: Proved in boreholes only. Thought to be possibly unconformable. The boundary is taken at the top of the uppermost limestone below a sandstone-dominated sequence of the Lydbrook Sandstone Formation.
Thickness: 30.5m maximum proved (from Lilleshall L6 borehole).
Geographical Limits: Lilleshall (North Shropshire) [SJ73 15].
Parent Unit: Avon Group (AVO)
Previous Name(s): Carboniferous Limestone [Obsolete entry, see Supplementary Information] (-4550)
Red And Grey Limestones (-2869)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Lilleshall Borehole L6 (SJ71NW/33), 8.5 - 39.0m depth (datum = ground level). 
Reference(s):
Waters, C N, Waters, R A, Barclay, W J, and Davies, J R. 2009. Lithostratigraphical framework for Carboniferous successions of Southern Great Britain (Onshore). British Geological Survey Research Report, RR/09/01. 184pp. 
Riley, N, 1998. Lilleshall Borehole L18 Lithology Log. British Geological Survey Technical Report WH/98/90R. 
Prestwich, J, 1840. On the Geology of Coalbrookdale. Transactions of the Geological Society of London, Series 2, Vol.5, 413-495. 
Murchison, R I, 1839. 'Silurian System'. [London: John Murray.] 
Whitehead, T H, Robertson, T, Pocock, R W and Dixon, E E L. 1928. Geology of the country between Wolverhampton and Oakengates. Memoir of the Geological Survey of Great Britain, Sheet 153 (England and Wales). 
Bridge, D M and Hough E, 2002. Geology of the Wolverhampton and Telford district. Sheet Description of the BGS Sheet 153 (England and Wales). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable