A revised scheme for coding unlithified deposits (also applicable to engineering soils)

[摘要] The St Andrew��s Bay Member from three localities off eastern Scotland were examined: two vibrocores 56-03/586 and 56-03/587 and borehole 74/15. Microfaunal results are tabulated in figures 1-6. From an ecostratigraphical point of view, and taking into account the radiocarbon dates obtained, the cold water fauans of parasequence 2 are placed into the Younger Dryas interstadial. The low Boreal to Lusitanian faunas of parasequence 3 are placed in the climatic ameliaration immediately following the interstadial. By comparison with the Lusitanian to low boreal faunas in Geordie Trough, parasequence 4 is postulated to have been deposited 4000-7000 years ago, although the highest part contains faunas comparable with the assemblages dated to 1158 years BP and younger, not very different from the radiocarbon date of 1782 years BP for the base of parasequence 4 (although this date may be too young).

[发布日期] 2006-12-05 [发布机构] British Geological Survey

[效力级别] Computer Science