Grain-size characteristics of fine-grained unflocculated sediments II:‘multi-round’ distributions
Article first published online: 28 JUN 2008
Volume 43, Issue 3, pages 597–606, June 1996
How to Cite
KRANCK, K., SMITH, P. C. and MILLIGAN, T. G. (1996), Grain-size characteristics of fine-grained unflocculated sediments II:‘multi-round’ distributions. Sedimentology, 43: 597–606. doi: 10.1046/j.1365-3091.1996.d01-28.x
- Issue published online: 28 JUN 2008
- Article first published online: 28 JUN 2008
- Manuscript received 3 March 1993; revision accepted 6 December 1995.
The grain-size spectrum of sediment deposited by settling of a suspension with a ‘one-round’ grain size distribution is described by a power law in which the integer exponent characterizing the fine-grained limb is increased by one over that of the suspension. If this better-sorted sediment, in turn, is resuspended and settles, further sorting and steepening of the limb occurs. Each resuspension event or‘round’changes the distribution by a predictable amount. Equations describing this sorting process, based on the derivation of the one-round equation, are fitted to grain-size analyses of well-sorted sediment from a variety of locations to verify the model. A suite of sandy bottom sediment samples from the Bay of Fundy shows that the steepness of the fine-grained limbs of the sand fraction indeed increases in integral steps.