These steady solutions agree with oceanic observations, which indicate that vortices in the ocean exist for years.
The detached amphibolitized oceanic crust may then return to shallow depths as a result of its positive buoyancy against the denser surrounding mantle.
The basement is thought to be oceanic crust, generated either at a mid-ocean ridge or by back-arc spreading dependent on the favoured model.
The break-off and detachment of the subducted oceanic slab and the accompanied upwelling of the deep asthenospheric mantle might lead to post-orogenic lithospheric extension.
This emphasizes that the mélange contains a range of oceanic, marginal and platformrelated units which require careful study to disentangle.
The theory is relevant to the dynamics of planetary waves in the atmosphere, and may also be applied to some oceanic problems.
Lithospheric buoyancy and collisional orogenesis: subduction of oceanic plateaus, continental margins, island arcs, spreading ridges, and seamounts.
Oceanic barriers as indicated by scombrid fishes and their parasites.
