Sediment can include cobbles, pebbles, gravel, sand and mud or a combination of these (European Environment Agency European, 2021).
For reference, sediment is classified taking into account particles' size and there are different classifications, emodnet uses (Mitchell P., 2021):
- gravel: 2 mm or more
- sand: 0.063 - 2 mm
- mud: less than 0.063 mm
Sources:
European Environment Agency European, Topic Centre on Biological Diversity (2021). "EUNIS habitat classification". Retrieved from https://eunis.eea.europa.eu/habitats/425, accessed on 2022-02-17.
Mitchell P. (2021). “EMODnet Geology – WP3 Case Study Exploring the suitability of historic datasets to produce robust quantitative sediment maps” Retrieved from: https://www.emodnet-geology.eu/wp-content/uploads/2021/10/Mitchell-2021_WP3-Cefas-Case-Study_V1.pdf, accessed on 2022-02-17.