In this research we look at the variation of cross anisotropy as a result of the application of vacuum assited consolidation in very soft clays that underlie a trial embankment that was built at a site in the former Texcoco Lake, some 11 km north-east of central Mexico City. Cross anisotropy was evaluated making refrence to the cross-anisotropy index, VSH/VSV. Velocities of shear waves propagated horizontally, VSH, were obtained from cross hole tests, and the velocities of shear waves propagated vertically, VSV, from seismic dilatometer and suspension logging tests. These tests were performed two months after the vacuum pumps were shut down so the shear wave velocities obtained then reflect the changes induced by the vacuum assisted consolidation on soil properties. The VSH/VSV ratio was also evaluated from resonant column tests performed on soil specimens retrieved from a site nearby the trial embankment. Samples were trimmed horizontally and vertically and were then tested in the resonant column. Field and laboratory test results showed that cross anisotropy of the studied soft lacustrine soils is barely affected by the stress state variation induced by vacuum assisted consolidation or by loading direction, as observed in the resonant column tests. Laboratory tests also showed that the VSH/VSV is related to liquidity index through an empirical equation that can be used to estimate fairly well field values of VSH/VSV.