The BGS Lexicon of Named Rock Units — Result Details

Monks Park Shale Formation

Computer Code: MPSH Preferred Map Code: MPSh
Status Code: Full
Age range: Merioneth Series (EM) — Merioneth Series (EM)
Lithological Description: Grey micaceous shaly mudstones in lower part. Black, locally calcareous and phosphatic mudstones in upper part.
Definition of Lower Boundary: Passage from underlying Moor Wood Formation marked by incoming of silty micaceous laminae and thin sandstone beds.
Definition of Upper Boundary: At the upper limit of a transition zone of alternating black and greenish grey mudstones, into overlying, predominantly black, Merevale Shales.
Thickness: 75 to 80m in general. 38m minimum in Merevale No.2 Borehole. 82m minimum in Merevale No.1 Borehole.
Geographical Limits: From the area west of Mancetter Quarry, extending northwestwards to just north of Merevale Hall (3072 9490 - 2954 9765).
Parent Unit: Stockingford Shale Group (SSH)
Previous Name(s): Monks Park Shales (-4802)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Sparse brash seen in fields. 
Reference Section  (Including upper boundary) Merevale No. 2 Borehole (SP39NW/6), 720' 1"- 846' 6". (Base not penetrated). 
Reference Section  (Including lower boundary). Merevale No. 1 Borehole (SP29NE/16), 107' 6"- 377' 4". 
Reference(s):
Baldock, J W, 1991. Geology of the Hartshill and Stockingford districts, Nuneaton. British Geological Survey Technical Report, WA/91/60. 
Illing, V C, 1913. Recent discoveries in the Stockingford Shales near Nuneaton. Geological Magazine, Vol.10/5, p.452-453. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E155 E154