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Veröffentlicht in Geo★ Down Under
Autoren Adam Beall, Louis Moresi

Cratons are anomalously-strong regions of the continents that have largely resisted tectonic forces for billions of years. How such strong zones could be forged in a hot, low-viscosity, low stress, early-Earth has been a long-standing puzzle for geologists. Adam Beall, Katie Cooper and Louis Moresi have recently proposed that cratons were made by the catastrophic switching on of plate tectonics.

Veröffentlicht in Geo★ Down Under
Autoren Adam Beall, Louis Moresi, Tim Stern

Modelling the relative time-scales of the Rayleigh-Taylor Instability and delamination, using Underworld Why model sub-continental gravitational instabilities? Within the plate tectonics framework, continents are generally considered to have a much lower density than the asthenosphere below and therefore avoid the kind of recycling that the oceanic crust and lithosphere undergoes.