The early predecessors of tonalitic and granitic gneisses range in age locally up to 3800 Ma, and therefore are the oldest rocks documented from Antarctica.

[4] Higher water pressures were inferred from observation of relatively abundant migmatitic gneisses and hydrous minerals such as biotite and hornblende, as well as the lack of mesoperthite.

This compression could have possibly produced the strong seismic reflections which were detected in the Lützow-Holm Complex (LHC), as well as the neighboring Princess Elizabeth Land (PEL).

Surface structures in this area contain near right angles in a generally N-S trending East African/Antarctic Orogen as verified by the presence of discovered magnetic anomalies.

[3] Multiple countries including Australia, Russia, and Japan have conducted recent marine surveys over the past several decades which have collected integrated data sets from seismic, gravitational, and magnetic studies in the southern Indian Ocean surrounding Enderby Land.

This data was combined and compiled in order to create an improved definition of crustal magnetic anomaly patterns and to help further understand the igneous activity and breakup processes associated with the creation of the East Antarctic passive margin.

Enderby Land is known to have higher seismic velocities than other neighboring regions, with its center around the Napier Complex, as determined by surface wave tomographic studies.