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زمینشناسی و معدن::
لایه رسوبی
Therefore, turbidity currents could reach the open ocean and the pelagic sedimentary layer was thickened considerably by distal turbidites (hemipelagic sediments: Fig. 7.7).
The remaining por- tion, or in some cases the entire sedimentary layer and parts of the oceanic crustal basement, can be scraped off at the frontal tip or the bottom of the
The scraped-off sedimentary layers are stacked and continuously uplifted by renewed underplating from below, a process that results in morphological elevation of the outer ridge.
Eight overthrust planes that display repetitions of the sedimentary layers have been drilled at the Vanuatu accretionary wedge in the SW Pacific (Fig. 7.8).
Because the sedimentary layer at the subducting plate has a thickness of slightly more than 100 m, the much greater thickness of the accretionary wedge is a result of intense tectonic
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