| Computer Code: |
AMTD |
Preferred Map Code: |
SYMB |
| Status Code: |
Full |
| Age range: |
Quaternary Period (Q)
— Quaternary Period (Q) |
| Lithological Description: |
The deposit comprises gravel overlain by silt. |
| Definition of Lower Boundary: |
Overlies the eroded Holme Pierrepont Sand and Gravel Member (HPSG). |
| Definition of Upper Boundary: |
Ground surface. |
| Thickness: |
Up to 3 m. |
| Geographical Limits: |
Derwent Valley. |
| Parent Unit: |
Trent Valley Formation (TRVA)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Ambaston [SK 42 32]. The member underlies an extensive terrace about 1 - 1.5 m above the Derwent floodplain. The terrace is extensively ridged and furrowed. |
| 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. |
| Fox-Strangways, C. 1905. The geology of the country between Derby, Burton-on-Trent, Ashby de la Zouch and Loughborough. Memoir of the Geological Survey of Great Britain, Sheet 141 (England and Wales). |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
