Depositional Sedimentary Environments - H-E Reineck, I B Singh - Häftad () | BokusSkip to main content Skip to table of contents. Advertisement Hide. Front Matter Pages Pages Depositional Environments. Physical Parameters. Current and Wave Ripples.
Depositional sedimentary environments
Depositional sedimentary environments. Download PDF. Recommend Documents. Depositional Sedimentary Environments. Chapter 6 Information on Depositional Sedimentary Environments.
Skip to main content Skip to table of contents. Advertisement Hide. Front Matter Pages Pages Depositional Environments. Physical Parameters. Current and Wave Ripples.
Load casts are bulges, lumps, and lobes that can form on the bedding planes that separate the layers of sedimentary rocks. The lumps "hang down" from the upper layer into the lower layer, and typically form with fairly equal spacing. These features form during soft-sediment deformation shortly after sediment burial, before the sediments lithify. They can be created when a denser layer of sediment is deposited on top of a less-dense sediment. This arrangement is gravitationally unstable, which encourages formation of a Rayleigh-Taylor instability if the sediment becomes liquefied for instance, by an imposed earthquake shock. Once the sediments can flow, the instability creates the "hanging" lobes and knobs of the load casts as plumes of the denser sediment descend into the less-dense layer.
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