Victoria University Antarctic Research Expedition Science and Logistics Reports 1979-80: VUWAE 24
Diagenesis
Diagenesis
The upper 12 m of the hole are unconsolidated sediment, but below this the resistance to the bit increased dramatically and the subsequent core from level to the bottom of the hole, showed a high degree of lithification, reflected in the sonic velocities of 2 to 3 km.s−1, which record an irregular increase down the hole (Table 2). Highly cemented layers of the order of a metre thick occur at a number of levels below 140 m, and several are correlated with seismic reflectors (Table 3, Fig. 9).