The BGS Lexicon of Named Rock Units — Result Details

Plungar Limestone Formation

Computer Code: PLLS Preferred Map Code: notEntered
Status Code: Full
Age range: Arundian Substage (CJ) — Arundian Substage (CJ)
Lithological Description: The base of the Formation comprises a 6m-thick bed of grey, pebbly sandstone. This is overlain by dolomitic limestones with two thinner sandstones in a 15m thickness of strata. White to buff, crystalline limestones, ooidal in part, occur above the youngest sandstone.
Definition of Lower Boundary: The unconformable base is taken where dolomitic, locally ooidal limestone of the Belvoir Limestone Formation is overlain by grey , pebbly sandstone of the Plunger Limestone Formation.
Definition of Upper Boundary: The top is taken where the white to buff, crystalline limestone of the Plunger Limestone Formation is overlain by grey mudstone, siltstone or sandstone of the Millstone Grit Group.
Thickness: 199m at the type locality.
Geographical Limits: Only proved in the subsurface at the type locality. May be present elsewhere in the subsurface on the Nottingham Shelf of the East Midlands Platform
Parent Unit: Peak Limestone Group (PKLM)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Type Section  Plungar 8A Borhole [SK73SE/27] 700m southeast of Poplar Farm, Plungar, Vale of Belvoir [SK7745 3336]: the full thickness of the Formation is proved between 1131 and 932m. 
Riley, N J. 1992. Faunal Biostratigraphy of Plungar 8A Bh. Interval 3280-4615 feet. British Geological Survey Technical Report, WH92/199C. 
Carney, J N, Ambrose, K, Brandon, A, Royles, C P, Lewis, M A, and Sheppard, H. 2004. Geology of the country around Melton Mowbray. Sheet Description of the British Geological Survey, 1:50 000 Series Sheet 142 Melton Mowbray (England and Wales). 
1:50K maps on which the lithostratigraphical unit is found, and map code used: