| Computer Code: |
BABY |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Pleistocene Epoch (QP)
— Pleistocene Epoch (QP) |
| Lithological Description: |
Sand and flint gravel believed by Penning and Jukes-Browne (1881) to have been deposited in a lake or wide reach of river in which there had been Gault islands separated by deeper channels made by the stream as it changed its course from time to time. |
| Definition of Lower Boundary: |
Unconformable on Gault mudstone and Chalk bedrock |
| Definition of Upper Boundary: |
At surface. |
| Thickness: |
Up to about 7m. |
| Geographical Limits: |
Restricted to local area in Cam valley north and east of Cambridge |
| Parent Unit: |
Cam Valley Formation (CAMV)
|
| Previous Name(s): |
Highest or Barnwell Terrace (Penning and Jukes-Browne, 1881) [Obsolete Name and Code: Use BABY]
(-3813)
|
| Alternative Name(s): |
3rd Terrace of River Cam [Obsolete: use HNRD]
|
| Stratotypes: |
| Type Section |
The stratotype is within a borehole, BGS Registered No. TL45NE/74 [TL 4623 5791], now within a built up area some 1.5 km west of Brookfields Hospital Romsey. The borehole proved 4.49 m of gravel on bedrock. Marr, 1920. |
| Reference(s): |
| Marr, J E.1920.The Pleistocene deposits around Cambridge.Quarterly Journal of the Geological Society of London,75,204-244. |
| Bowen, D Q. 1999. A revised correlation of Quaternary deposits in the British Isles. Geological Society Special Report, No. 23. |
| Penning, W H and Jukes-Browne, A J, 1881. Geology of the neighbourhood of Cambridge. Memoir of the Geological Survey, Old Series Sheets 51SW and part 51NW (England and Wales). |
| Worssam, B C and Taylor, J H. 1969. The geology of the country around Cambridge. Memoir of the Geological Survey of Great Britain, Sheet 188 (England and Wales). |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E188
E205
|
