{"thcode":2,"term":{"code":493,"name":"grain-size analysis","parent":619,"scope":"Method of studying soils, sediments, sands, or rock by determining the size, distribution, and proportion of selected particles."},"uf":[{"name":"grainsize analysis","usewith":false},{"name":"granulometry","usewith":false},{"name":"particle-size analysis","usewith":false}],"bt":[{"code":619,"name":"laboratory methods","parent":734,"scope":"Techniques to analyze and test samples in a place equipped and designed for the work."},{"code":734,"name":"methods","parent":1,"scope":"Techniques, methods, procedures, or strategies for research, management, collection, or analysis of scientific information in USGS."},{"code":1,"name":"Categories","parent":null,"scope":"Thematic terms for categorizing information resources.  This thesaurus is intended to support finding and understanding scientific information."}],"nt":[{"code":1062,"name":"sieve-size analysis","parent":493,"scope":"Analytic technique determining the distribution of the different sizes of particles in soil, sediment, or rock samples by measuring the percentage that will pass through mesh holes of known size."}],"rt":[{"code":1037,"name":"sedimentology","parent":464,"scope":"Branch of earth sciences concerned with the study of the origin, composition, transport, and changes of materials deposited by water, wind, or ice."}]}