Research report number RR 99-06. BGS rock classification scheme. Volume 3. Classification of sediments and sedimentary rocks / Отчет об исследовании № RR 99-06. Схема классификации горных пород BGS. Том 2. Классификация осадков и осадочных пород

The purpose of this report is to present a classification for lithified and unlithified sediments that is logical, systematic, hierachial and uses clearly defined, unambiguous names. Although classification systems for igneous rocks have been published (International Union of Geological Sciences, Subcommission on the Systematics of Igneous Rocks), a unifying scheme for classifying sedimentary rocks and their unlithified equivalents has not yet been formulated. Existing sediment and sedimentary rock nomenclature has been developed on a wide range of criteria, such as composition, texture and other physical attributes, as well as depositional environment, genetic relationship and local economic importance. As a result, sediment and sedimentary rock terminology tends to be inconsistent and lacking in basic general guidelines. <...>