Abstract

Field relations in the emergent part of the Makran accretionary prism show that a mid-Miocene to early Pliocene slope and shelf sedimentary sequence was deposited directly on abyssal-plain turbidites without any detectable stratigraphic or structural discordance. Sedimentological evidence for rapid shoaling, however, indicates that the underlying sediment column was tectonically thickened by a factor of between two and three during this period. This can be explained by large-scale underthrusting and underplating of sediment—a mode of accretion that is also favored by mass-balance considerations. The visible deformation in the coastal Makran occurred when the region was 70–100 km north of the contemporary prism front.

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