Computer Code: |
BURV |
Preferred Map Code: |
notEntered |
Status Code: |
Full |
Age range: |
Hoxnian Stage (QX)
— Holocene Epoch (QH) |
Lithological Description: |
Formation encompasses the fluvial, lacustrine and organic deposits of the River Bure and its tributaries. It includes alluvium and a restricted development of river terrace deposits. The floodplain alluvium comprises soft clays, silts and fine-grained sands, with bodies of peat, overlying fine- to coarse-grained sands and gravels. River terrace deposits are largely gravel and sand. The gravels are dominated by subangular to rounded flint, including large cobbles, but also include rounded pebbles of quartz and quartzite, northern British erratics of glacial derivation, and a little chalk. |
Definition of Lower Boundary: |
Unconformable on glacial and solifluction deposits and upon Crag Group and Chalk Group bedrock. |
Definition of Upper Boundary: |
Surface. |
Thickness: |
About 5 m. |
Geographical Limits: |
Valley of River Bure and its tributaries in North Norfolk to its junction with the River Yare near Great Yarmouth. |
Parent Unit: |
Yare Catchments Subgroup (YCAT)
|
Previous Name(s): |
none recorded or not applicable
|
Alternative Name(s): |
none recorded or not applicable
|
Stratotypes: |
Type Area |
Valley of River Bure from near Cromer to near Great Yarmouth (Moorlock et al., 2002). |
Reference(s): |
Moorlock, B S P, Hamblin, R J O, Booth, S J, Kessler, H, Woods, M A and Hobbs, P R N. 2002. Geology of the Cromer district - a brief explanation of the geological map. Sheet explanation of the British Geological Survey. 1:50 000 Sheet 131 Cromer (England and Wales). |
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. |
Moorlock, B S P, Hamblin, R J O, Booth, S J and Woods, M A. 2002. Geology of the Mundesley and North Walsham district - a brief explanation of the geological map. Sheet explanation of the British Geological Survey. 1:50 000 Series Sheets 132 and 148 Mundesley and North Walsham (England and Wales). |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
E131
E147
E148
E162
|