Grain-size characteristics of fine-grained unflocculated sediments I:‘one-round’ distributions
Article first published online: 28 JUN 2008
Volume 43, Issue 3, pages 589–594, June 1996
How to Cite
KRANCK, K., SMITH, P. C. and MILLIGAN, T. G. (1996), Grain-size characteristics of fine-grained unflocculated sediments I:‘one-round’ distributions. Sedimentology, 43: 589–594. doi: 10.1046/j.1365-3091.1996.d01-27.x
- Issue published online: 28 JUN 2008
- Article first published online: 28 JUN 2008
- Manuscript received 3 March 1993; revision accepted 6 December 1995.
A simple physical model of gravitational settling from an unsorted, unflocculated source suspension is presented and an equation derived to describe the grain-size spectra of the resulting bottom sediment. Results of grain-size analyses of sediments from a variety of environments and geographical locations are shown to conform with the postulated model. The characteristic size spectrum, termed ‘one-round’ sediment, identifies a deposit which has settled from suspension with no subsequent reworking resulting in modification of the grain-size distribution. The distribution of settling rates of grains in the suspension may be inferred from an analytical form fit to the bottom sediment grain-size spectrum, along with knowledge of certain physical characteristics of the fluid (e.g. mean velocity profile).