Collisional Processes and Links to Episodic Changes in Subduction Zones: Supplementary Movies (Elements v11 n2, p 119-124)

Jeroen van Hunen—Department of Earth Sciences, Durham University, UK

Meghan S. Miller—Department of Earth Sciences, University of Southern California, USA


Movie S1

Development of a back-arc basin. A three-dimensional view (top image), side view (bottom image) and top view (right image) illustrate the development through time. The growing curve (left image) illustrates the trench migration rate through time, with negative values indicating (continent-ward) trench advance motion. Several individual phases can be recognized. See main text for a discussion of the model results. Modified after (Magni et al. 2014).

MP4 format

QuickTime format


Movie S2

Development of small-scale convection at the base of lithosphere. It illustrates the development of random and chaotic instabilities that result in downwelling ‘drips’ of lithosphere. These instabilities are capable of producing small-degree partial melts and prevent the lithosphere from growing thicker. Modified after (Kaislaniemi et al. 2014).

AVI format



Kaislaniemi L, van Hunen J, Allen MB, Neill I (2014) Sub-lithospheric small-scale convection—a mechanism for collision zone magmatism. Geology 42: 291-294, doi: 10.1130/G35193.1

Magni V, Faccenna C, van Hunen J, Funiciello F (2014) How collision triggers backarc extension: insight into Mediterranean style of extension from 3-D numerical models. Geology 42: 511-514, doi: 10.1130/G35446.1