Puysegur trench formation

A schematic highlighting the formation of the Puysegur trench, New Zealand, where subduction zone initiation may be both horizontally and then vertically driven, according to a 4D evolution model of this margin.

Subduction zone initiation forcing

Illustration of the two endmember forcing states, namely vertically and horizontally driven, characterising subduction zone initiation (SZI).

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