The BGS Lexicon of Named Rock Units — Result Details

Cradley Silts Formation

Computer Code: CRSI Preferred Map Code: notEntered
Status Code: Pending Upgrade
Age range: Anglian Stage (QA) — Hoxnian Stage (QX)
Lithological Description: Grey fossiliferous, clayey silt with sand grains and local rock fragments and a peat layer up to 0.1 near top.
Definition of Lower Boundary: Placed at base of Bed A3 in an augerhole section proved at Colwall, Hereford and Worcester, where it overlies red-brown clays (Bed A2) of the White House Silts. (Barclay, et al, 1992).
Definition of Upper Boundary: Placed at base of Beds A7a and B7a, in Colwall augerholes, where they are overlain by stony clay of the Colwall Gelifluctate.
Thickness: 1 metre.
Geographical Limits: Colwall, in headwaters of Cradley Brook, Hereford and Worcester.
Parent Unit: Not Entered (?)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  (Only known section). Two shallow augerholes made and described by the British Geological Survey, near Colwall. 
Reference(s):
Barclay, W J, Brandon, A, Ellison, R A and Moorlock, B S P. 1992. A Middle Pleistocene palaeovalley-fill west of the Malvern Hills. Journal of the Geological Society of London, Vol. 149, 75-92. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable