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- W125553998 abstract "The sedimentary fill of foreland basins straddles the transitional zone separating mountain belts from cratons, exhibits a unique sedimentary tectonic evolution, and has a high economic potential. The mineral composition of foreland basin sandstones show that most detritus is derived from a recycled orogen provenance, except for an early stage in which debris is eroded from subjacent continental blocks. Magmatic arcs and subduction complexes are not important sources of foreland basin detritus, probably due to topographic effects. Evidence for systematic unroofing of foreland basin sources is tenuous at best. The bulk chemical composition of foreland basin assemblages (estimated using published analyses of average sedimentary rock types) most resembles the fill of ancient geosynclines in general, and eugeoclines (eugeosynclines) specifically. It is almost meaningless to compare foreland basin fill with modern continental margin and ocean basin sediments because of secular changes in the site of carbonate deposition. The rate at which sediment accumulates in foreland basins (.044 to .927 m/1000yrs; mean is .186 m/1000yrs) exceeds sediment accumulation rates for cratonic basins and the abyssal ocean floor by a factor of 5 to 30. Comparably high rates of sediment accumulation characterize ancient aulacogens and modern rift valleys, successor basins, and (surprisingly) somemore » modern trenches.« less" @default.
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- W125553998 date "1985-01-01" @default.
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- W125553998 title "Characteristics of foreland basin fill" @default.
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