Convolute lamination or convolute bedding is a special type of intraformational deformation layering or lamination, characterized by meandering and winding laminates within a layer in concordant sequence with roof and floor layers.
Convolution is generally the most beautiful and most commonly developed in fine-grained sandy and siltous sediments.
The origin of a convolution can be different. It arises as a result of hydroplastic deformation of still unhardened sediments under the influence of strong water currents flowing above such sediments (Sanders, 1965).
In addition, it can also occur in the post-sedimentation phase as a result of hydroplastic deformations due to the sudden displacement of pore water during fluidization and liquefaction (Lowe, 1975), but also as a consequence of injection (Reineck & Singh, 1973) and the sudden release of gases from the sediment.
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