What is sorting?
Sorting is a measure of the range of particle sizes within a sample. A sample that is well sorted has a narrow range of sizes, such as beach sand. In contrast, a sample that is poorly sorted has a relatively large range of grain sizes.
Sorting is measured by determining the % of each size particle in a sample and then using an equation to determine a numeric value. The lower the value, the better the sorting.
1.0-2.0 Poorly sorted
0.7-1.0 Moderately sorted
0.5-0.7 Moderately well sorted
0.35-0.5 Well sorted
<0.35 Very well sorted