OR/13/001 Modelled surfaces/volumes: Difference between revisions
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| Kesgrave Sand and Gravel | | Kesgrave Sand and Gravel | ||
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| BEDROCK | |- | ||
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|Gault Formation | |Gault Formation | ||
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|LENS | |- | ||
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Multiple layers of storm beach deposits were needed to cope with interdigitated sequences and Holocene evolution. The Anglian glacigenic sediments shown above in blue comprise the Lowestoft Formation and within them a single lens is identified (gsg1). Legend colours in many cases loosely correspond to the 50K published map sheets. The difficulty in separating the thin Thanet Sand Formation from the Reading Formation (Lambeth Group) has resulted in the use of the older Lower London Tertiaries term being used for this package of strata. The Harwich and London Clay Formations cannot be mapped out separately and are lumped together as the Thames Group. | Multiple layers of storm beach deposits were needed to cope with interdigitated sequences and Holocene evolution. The Anglian glacigenic sediments shown above in blue comprise the Lowestoft Formation and within them a single lens is identified (gsg1). Legend colours in many cases loosely correspond to the 50K published map sheets. The difficulty in separating the thin Thanet Sand Formation from the Reading Formation (Lambeth Group) has resulted in the use of the older Lower London Tertiaries term being used for this package of strata. The Harwich and London Clay Formations cannot be mapped out separately and are lumped together as the Thames Group. | ||
The model abuts the Ipswich-Sudbury model to the north (Mathers, 2012<ref name="Mathers 2012"> | The model abuts the Ipswich-Sudbury model to the north (Mathers, 2012<ref name="Mathers 2012">MATHERS, S J. 2012. Model metadata summary report for the Ipswich-Sudbury LithoFrame 10-50 model. ''British Geological Survey Open Report OR/12/080''.</ref>), shared docker sections ensure a common interpretation along the join at northing 30. | ||
==References== | |||
{{reflist}} | |||
[[Category:OR/13/001 Model metadata summary report for the Colchester LithoFrame 10-50 model | 03]] | [[Category:OR/13/001 Model metadata summary report for the Colchester LithoFrame 10-50 model | 03]] | ||
Latest revision as of 12:56, 4 August 2021
Geological units in the model are as follows:
| CODE NAME | |
| mgr | Made ground |
| wgr | Worked ground |
| wmgr | Worked and made ground |
| stobco | Shoreface and beach upper layer (along coast) |
| alv | Main Freshwater Alluvium |
| itdu | Intertidal Deposits undifferentiated |
| stob | Shoreface and beach deposits lower layer |
| isc | Interglacial silt and clay |
| head1 | Head (silt reworked loess?) |
| brk | Brickearth (local overbank deposits on terraces) |
| rtdu | River Terrace Deposits undifferentiated |
| lde1 | Lacustrine deposits (Clacton and Marks Tey) |
| gstc | Glacial Silt and Clay supramain till |
| gsg | Glacial Sand and Gravel supramain till |
| loft | Lowestoft Till (main sheet) |
| gstcb1 | Glacial Silt and Clay below till 1 |
| gsgb1 | Glacial Sand and Gravel below till 1 |
| gcd | Glacial Channel deposits |
| igd | Interglacial deposits (Little Oakley) |
| kes | Kesgrave Sand and Gravel |
| BEDROCK | |
| rcg | Red Crag Formation |
| tham | Thames Group |
| llte | Lower London Tertiaries |
| ck | Chalk Group undiff |
| glt | Gault Formation |
| LENS | |
| gsg1t | Glacial Sand and Gravel in main till sheet (top) |
| gsg1 | Glacial Sand and Gravel in main till sheet (base) |
The sequence shares a common *.gvs with the adjacent Ipswich-Sudbury area model.
Multiple layers of storm beach deposits were needed to cope with interdigitated sequences and Holocene evolution. The Anglian glacigenic sediments shown above in blue comprise the Lowestoft Formation and within them a single lens is identified (gsg1). Legend colours in many cases loosely correspond to the 50K published map sheets. The difficulty in separating the thin Thanet Sand Formation from the Reading Formation (Lambeth Group) has resulted in the use of the older Lower London Tertiaries term being used for this package of strata. The Harwich and London Clay Formations cannot be mapped out separately and are lumped together as the Thames Group.
The model abuts the Ipswich-Sudbury model to the north (Mathers, 2012[1]), shared docker sections ensure a common interpretation along the join at northing 30.
References
- ↑ MATHERS, S J. 2012. Model metadata summary report for the Ipswich-Sudbury LithoFrame 10-50 model. British Geological Survey Open Report OR/12/080.