HypothèseConventionnelle

Post-salt Breakup Hypothesis

(Conventional Hypothesis)

In such a conventional hypothesis, the breakup of the lithosphere of the supercontinent is not evident. It seems to occur after a sag phase deposited above the more or less coeval rift-type basins. If that is true, in South Atlantic offshores, for instance, an unique salt basin was deposited in a sag phase. Then, it was cut in two parts by the breakup of the Gondwana, which individualized two lithospheric plates separated by a rift-valley (not be confused with a rift-type basin). Each part of the original salt basin drift away from rift-valley as seafloor spreading takes place. This conventional hypothesis was refuted since longtime (Jackson, M. P. A. and Cramez, C., 2000).