| Computer Code: |
SURF |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Marine Isotope Stage 1 (QMIS001)
— Marine Isotope Stage 1 (QMIS001) |
| Lithological Description: |
Dominantly sands, with subordinate mud, peat and some basal lag gravel, together with a rich fossil assemblage of present day species. |
| Definition of Lower Boundary: |
Unconformable erosion surface (the "Y" seismic unconformity of Akhurst et al., 1997) proved by seabed cores, lying upon the Western Irish Sea Formation. |
| Definition of Upper Boundary: |
Present day sea-bed surface. |
| Thickness: |
Generally from 0.5 m to 2 m, reaching 40 m in sandbanks and up to 100 m in channel infills. |
| Geographical Limits: |
Irish Sea. |
| Parent Unit: |
British Coastal Deposits Group (COAS)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
Offshore BGS borehole no. 71/62 at 0 m - 7 m depth and 3 deg 93.8' W and 54 deg 25.4' N, (and borehole 71/41 but no depths), in conjunction with NIREX seismic line 89/29 shotpoints 2621 to 2630. Nirex 1997a, b. |
| Reference Section |
Offshore BGS borehole no. 71/64 at 0 m - 5 m depth and 3 deg 56.4' W and 54 deg 29.1' N. |
| Reference(s): |
| NIREX. 1997a. A summary of the correlation and nature of onshore and offshore Quaternary sediments of the Sellafield area. UK NIREX Ltd. Report No SA/97/042. |
| NIREX. 1997b. Interpretation of the BNFL/NIREX offshore high resolution seismic data. UK NIREX Ltd. Report No SA/97/042. |
| Pantin, H M. 1978. Quaternary sediments from the north-east Irish Sea: Isle of Man to Cumbria. Bulletin of the Geological Survey of Great Britain, Vol 64, 1-43. |
| Stoker, M S, McMillan, A A and Waters, C N. Quaternary Stratigraphical Chart: Southern Britain. British Geological Survey, 1 poster. |
| 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. |
| Akhurst, M C, Chadwick, R A, Holliday, D W, McCormac, M, McMillan, A A, Millward, D, Young, B, Ambrose, K, Auton, C A, Barclay, W J, Barnes, R P, Beddoe-Stephens, B, James, J C W, Johnson, H, Jones, N S, Glover, B W, Hawkins, M P, Kimbell, G S, MacPherson, K A T, Merritt, J W, Milodowski, A E, Riley, N J, Robins, N S, Stone, P, and Wingfield, R T R. 1997. The geology of the west Cumbria district. Memoir of the British Geological Survey, Sheets 28, 37 and 47 (England and Wales). 138pp. |
| Stoker, M S, Balson, P S, Long, D, and Tappin, D R. 2011. An overview of the lithostratigraphical framework for the Quaternary deposits on the United Kingdom continental shelf. British Geological Survey Research Report, RR/11/03. 48pp. |
| Hession, M A. 1988. Quaternary geology of the South Irish Sea. Unpublished PhD thesis, University of Aberystwyth. |
| Tappin, D R, Chadwick, R A, Jackson, A A, Wingfield, R T R and Smith, N J P. 1994. United Kingdom offshore regional report; the geology of Cardigan Bay and Bristol Channel. (London: HMSO for the British Geological Survey.) |
| Cameron, T D J, and Holmes, R. 1999. The Continental Shelf. 125-139 in A revised correlation of Quaternary deposits in the British Isles. Bowen, D Q (editor). Special Report of the Geological Society of London, No. 23. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E037
|
