Wentworth proposed a classification system for clastic sediments based on size, shape, and composition. He identified grade terms for different sediment sizes, including bowlder, cobble, pebble, granule, sand grain, silt particle, and clay particle. These terms are based on size ranges determined by a geometric progression, with each size doubling the previous one. The terms are used for rounded fragments, except for fine sands, silts, and clays, which may not be rounded. The terms do not have lithologic, mineralogic, or chemical significance. The classification system was developed after extensive research and consultation with geologists. The grade terms are used to classify sediments, while aggregate terms such as gravel, sand, silt, and clay are used to describe the overall composition of sediments. Rock terms such as conglomerate, sandstone, siltstone, and claystone are used to describe the rock equivalents of sediments. The class terms are used to classify soils based on their composition and texture. The classification system was tested against a large number of sediment analyses and found to be applicable to natural sediments. The system is based on a geometric progression of size ranges and is considered a simple and effective way to classify sediments. The classification system is not all-inclusive and does not apply to all sediment types, such as glacial till. The system is based on mechanical analysis and is considered more accurate than verbal schemes for quantitative classification. The classification system is intended to be used in the study of sediments and is considered a useful tool for geologists.Wentworth proposed a classification system for clastic sediments based on size, shape, and composition. He identified grade terms for different sediment sizes, including bowlder, cobble, pebble, granule, sand grain, silt particle, and clay particle. These terms are based on size ranges determined by a geometric progression, with each size doubling the previous one. The terms are used for rounded fragments, except for fine sands, silts, and clays, which may not be rounded. The terms do not have lithologic, mineralogic, or chemical significance. The classification system was developed after extensive research and consultation with geologists. The grade terms are used to classify sediments, while aggregate terms such as gravel, sand, silt, and clay are used to describe the overall composition of sediments. Rock terms such as conglomerate, sandstone, siltstone, and claystone are used to describe the rock equivalents of sediments. The class terms are used to classify soils based on their composition and texture. The classification system was tested against a large number of sediment analyses and found to be applicable to natural sediments. The system is based on a geometric progression of size ranges and is considered a simple and effective way to classify sediments. The classification system is not all-inclusive and does not apply to all sediment types, such as glacial till. The system is based on mechanical analysis and is considered more accurate than verbal schemes for quantitative classification. The classification system is intended to be used in the study of sediments and is considered a useful tool for geologists.