21. During the Permian the zone of arc magmatism moved from the Coastal Batholith 350 km inland reaching accretionary complex. 22. Convergent margins with growing accretionary prisms are called accretionary convergent margins and make up nearly half of all convergent margins. 23. Convergent margins with growing accretionary prisms are called accretionary convergent margins and make up nearly half of all convergent margins. 24. Strain rate and hydrologic properties strongly influence the strength of the accretionary prism and thus the angle of critical taper. 25. Subduction erosion may also diminish a once-robust accretionary prism if the flux of sediments to the trench diminishes. 26. The accretionary events started in the Cretaceous, around 140 million years ago, and have continued until recent times. 27. In early stages of arc-continent collision, there is uplift and erosion of the accretionary prism and forearc basin. 28. A distinctive strip-thrust fold locates on the western boundary of the accretionary wedge occurs on south of Enggano Island. 29. Average accretionary wedge has a width about 155 163 km, and the forearc basin has about 100 140 km thickness. 30. Well-developed back-thrust faults, microfractures and gravitational collapse are found in the accretionary wedge of the Manila Trench.
