Victoria University Antarctic Research Expedition Science and Logistics Reports 1979-80: VUWAE 24

Deformation

Deformation

Soft sediment deformation occurs in many parts of the core, but is more marked in Units 9 and 10. Three types are recognised: page 21

1. Wavy bedding. Stratification is slightly undulose with an amplitude of only a few centimetres, and occurs almost wherever stratification can be discerned. It is thought to have formed at or soon after sedimentation.
2. Inclined bedding. This was mainly confined to the interval from 145 to 1B6 metres. Inclinations of 20 to 40° are common, though at 157 and 182 m stratification is vertical. No overturning was recognised.
3. In situ brecciation of at least partly lithified strata, usually accompanied sand injection. This is common between 148 and 156 m, and was also seen elsewhere (e.g. 126 m).

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