In Area B iceberg ploughmarks could be seen and identified across the entire Area. The form of these ploughmarks can vary significantly and depend on the type of sediment, the shape of the iceberg keel (usually V-shaped) and the motion of the iceberg (Shakesby, 1986). The presence of these ploughmarks in the PIT indicates a period of slower ice flow, as sediment has been allowed to accumulate, and then the icebergs have formed depressions as the ice retreated. These depressions can be characterised as more V-shaped, providing evidence they were formed from icebergs (not other large forms of materials), as seen in the profile graph of Fig. 3.6. Graham et al (2009) states that iceberg ploughmarks record the latest phase of shelf evolution and were subsequently formed when the ice retreated. These ploughmarks are evidence that after a period of fast flow (Area C) the ice retreat then slowed, allowing these subglacial landforms to be formed. They highlight the significance of ice streams and in particular the speed in which they flow, in constructing the geomorphology of the sea floor surrounding the Antarctica.In conclusion, past ice streams have had a huge impact on the features formed on the sea floor in the Pine Island Trough around the Antarctica. The range of features produced demonstrates the different states of flow the ice streams went through, with the GMZ and iceberg ploughmarks showing periods of stagnation/slow flow and the MSGLs showing periods of fast flow. Looking at Dowdeswell et al. (2008) model of Antarctic ice-stream retreat we can conclude that the PIT area conforms most to the episodic retreat with periods of fast and slow flow causing superimposed grounding zone wedges to be formed. These findings can now be used to help predict future flow rate and subsequent landforms as the ice continues to retreat, and at a faster pace, as a result of increased anthropogenic activity.