| Computer Code: |
BACKC |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Pleistocene Epoch (QP)
— Pleistocene Epoch (QP) |
| Lithological Description: |
Principally clayey sand and gravel with sand beds of limited lateral extent. |
| Definition of Lower Boundary: |
Rests on the eroded surface of bedrock. |
| Definition of Upper Boundary: |
Present day land surface. |
| Thickness: |
The mapped extent of the deposits suggest that the member is between 2m and 5m thick. |
| Geographical Limits: |
Limited to two mapped outcrops within the Western Yar Valley on the eastern flank of the valley, to the east of Freshwater. |
| Parent Unit: |
Western Yar River Formation (WYAR)
|
| Previous Name(s): |
Gravel terrace [Obsolete Name and Code: Use KINGM, DOWNF, BACKC]
(-217)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Two outcrops in the vicinity of Backet's Copse, Freshwater on the eastern flank of the Western Yar Valley. |
| Reference(s): |
| British Geological Survey. 1976. Isle of Wight. England and Wales Special Sheet incorporating parts of sheets 330, 331, 344, 345. Bedrock and Drift 1:50 000. (Keyworth, Nottingham: British Geological Survey.) |
| White, H J O. 1921. A short account of the geology of the Isle of Wight. Memoir of the Geological Survey of Great Britain, (1994 reprint). |
| British Geological Survey. 2013. Isle of Wight. England and Wales Special Sheet incorporating parts of sheets 330, 331, 344, 345. Bedrock and Superficial Deposits. 1:50 000. (Keyworth, Nottingham: British Geological Survey.) |
| Hopson, P M, and Farrant A R. 2014. Geology of the Isle of Wight - a brief explanation of the Isle of Wight Special Geological Map Sheet. Sheet Explanation of the British Geological Survey. Parts of 1:50 0000 Sheets 330 (Lymington), 331 (Portsmouth), 344 (Chale) and 345 (Ventnor) (England and Wales) |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
