Mixed: Mixtures of a variety of sediment types, composed of pebble / gravel / sand / mud. This category includes muddy gravels, muddy sandy gravels, gravelly muds, and muddy gravelly sands.
- Long D.,2006. BGS detailed explanation of seabed sediment modified Folk classification. http://www.emodnet-seabedhabitats.eu/PDF/BGS%20detailed%20explanation%20of%20seabed%20sediment%20modified%20folk%20classification.pdf, Folk R.L. (1954). The distinction between grain size and mineral composition in sedimentary-rock nomenclature. The Journal of Geology, 344-359.
Definition requires input from EMODNET habitats. The current 'definition' is a catch all that needs specialist input and discussion. At present the 'slightly gravelly' categories (Folk, 1954; Long, 2006) are not included. Where does 'lag' fit into this scheme.