| Computer Code: |
CGEL |
Preferred Map Code: |
CG |
| Status Code: |
Full |
| Age range: |
Wolstonian Stage (QO)
— Wolstonian Stage (QO) |
| Lithological Description: |
Stiff, mainly yellow-brown gravelly silty clay or clayey silt with angular clasts of local lithologies. |
| Definition of Lower Boundary: |
Placed at junction of Beds 6 and 7 in augerholes at Colwall, where stony clay of the Colwall Gelifluctate overlies sandy silt/clay of the Cradley Silts (Barclay et al., 1992). |
| Definition of Upper Boundary: |
Not generally seen, but placed at junction with overlying younger solifluction or alluvial deposits. |
| Thickness: |
2 - 4 m. |
| Geographical Limits: |
Cradley - Glynch Brook Valleys in Mathon - Colwall area, Herefordshire. |
| Parent Unit: |
Cradley Valley Formation (CRVA)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
Warner's Farm Gravel Pit (now obscured). |
| Type Section |
Two British Geological Survey augerholes (on same site) near Colwall, 500 m west of Barton Farm. |
| 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: |
|
E199
|
