Reefs were not indicated in the seismic studies, but fragmented pieces of coral were recovered and documented, showing a shallow-water sediment-rich condition.
Seismic interpretation shows that deposition in the western area was essentially post-rift - resulting in packages of parallel reflectors on seismic data.
The doctor believes that the planet is uninhabited, which was the earlier belief, and that the seismic eruptions must have triggered an automatic defense mechanism.