Interpreted Along-Track Seismic Profile from 3-D Cube
(Image Modified from Tobin and others, 2009)
Compare your interpretation to the one shown above, feature by feature from the list below.
You may want to highlight any areas or features where they do not agree.
Explain any discrepancies and defend your interpretation if you wish.
Trench sediments (tan-yellow)
Shikoku Basin sediments carried into trench on the subducting oceanic crust.
- Frontal thrust zone, which is the most eastward (oceanward) series of thrusts. These are presumably the youngest thrusts, but not the only active thrust faults in the prism.
- Imbricate thrust zone, composed of the offscraped sediments of the accretionary prism
- Slope sediments resting on top of the offscraped sediments of the accretionary prism (light green).
- Kumano forearc basin sediments (green).
- Top of the subducting oceanic crust (light blue).
- Fault offseting top of the subducting oceanic crust.
- Subducting sediments of Shikoku Basin sediments.
- Decollement (active)
- Older, now inactive decollement.
- Mega-splay fault, separating the young portion of accretionary prism from older accretionary prism, located under the sediment of the Kumano forearc basin.