Chester K. Wentworth, from the State University of Iowa, presents a comprehensive classification system for clastic sediments, focusing on the terms used to describe their size and composition. The paper addresses the challenges in geological terminology, particularly in geology, due to the field's global nature and the evolution of terms over time. Wentworth's work is based on extensive research and feedback from colleagues and experts in the field. The classification system is divided into three main sections: Grade Terms, Class Terms, and Rock Terms. Grade Terms describe the size and shape of rounded rock fragments, including bowlders, cobbles, pebbles, granules, sand grains, silt particles, and clay particles. Class Terms categorize these aggregates into classes based on their composition, such as gravel, sandy gravel, silty sand, and clay. Rock Terms refer to the consolidated forms of these aggregates, including conglomerate, sandstone, siltstone, and claystone. Wentworth emphasizes the importance of a geometric series for defining the size limits of the grades, using a ratio of 2 starting from 1 mm. This approach ensures uniformity and ease of interpretation. The classification is designed to be practical and widely accepted, with the goal of facilitating the study of sediments and their mechanical composition. The paper also includes a table of mechanical analyses by J. A. Udden, demonstrating the applicability of the classification to natural sediments.Chester K. Wentworth, from the State University of Iowa, presents a comprehensive classification system for clastic sediments, focusing on the terms used to describe their size and composition. The paper addresses the challenges in geological terminology, particularly in geology, due to the field's global nature and the evolution of terms over time. Wentworth's work is based on extensive research and feedback from colleagues and experts in the field. The classification system is divided into three main sections: Grade Terms, Class Terms, and Rock Terms. Grade Terms describe the size and shape of rounded rock fragments, including bowlders, cobbles, pebbles, granules, sand grains, silt particles, and clay particles. Class Terms categorize these aggregates into classes based on their composition, such as gravel, sandy gravel, silty sand, and clay. Rock Terms refer to the consolidated forms of these aggregates, including conglomerate, sandstone, siltstone, and claystone. Wentworth emphasizes the importance of a geometric series for defining the size limits of the grades, using a ratio of 2 starting from 1 mm. This approach ensures uniformity and ease of interpretation. The classification is designed to be practical and widely accepted, with the goal of facilitating the study of sediments and their mechanical composition. The paper also includes a table of mechanical analyses by J. A. Udden, demonstrating the applicability of the classification to natural sediments.