Computer Code: |
CRSI |
Preferred Map Code: |
notEntered |
Status Code: |
Full |
Age range: |
Hoxnian Stage (QX)
— Hoxnian Stage (QX) |
Lithological Description: |
Grey fossiliferous, clayey silt with sand grains and local rock fragments and a peat layer up to 0.1 m 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 Member. |
Thickness: |
1 m. |
Geographical Limits: |
Colwall, in headwaters of Cradley Brook, Hereford and Worcester. |
Parent Unit: |
Cradley Valley Formation (CRVA)
|
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 [SO 7381 4000]. |
Reference(s): |
McMillan, A A, Hamblin, R J O, and Merritt, J W. 2011. A lithostratigraphical framework for onshore Quaternary and Neogene (Tertiary) superficial deposits of Great Britain and the Isle of Man. British Geological Survey Research Report, RR/10/03. 343pp. |
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 |