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We investigated the relationship between tectonism and sedimentation in the Karoo Basin by integrating U-Pb single-grain detrital zircon analyses from seven sandstones with U-Pb zircon analyses from 30 volcanic tuffs. U-Pb detrital zircon data from the Karoo Supergroup strata indicate that the source of the turbiditic, deltaic, and fluvial sediments included an active volcanic province, with increasing contribution from the nearby Cape fold belt through time. The depositional ages obtained from the turbiditic strata of the Karoo Basin, based on U-Pb zircon tuff ages, and the published ages for Cape fold belt deformation suggest that the influx of coarse...

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