| The Spontang ophiolitc, for example, is associated with partial subduction of buoyant continental crust. |
| Around both zones accretionary wedges are indications of Cretaceous subduction. |
| What remains unclear is whether the rocks formed in an open ocean or a marginal back-arc basin associated with a subduction zone. |
| The tensional stresses in the uplift can be relaxed by, for example, underthrusting in a subduction zone, or contraction in surrounding regions. |
| Palaeozoic volcanicity was conspicuous along active continental margins especially where there was subduction. |
| The most widely accepted view is that of an accretionary prism developed above an active subduction zone. |
