Angela Bassett is working.
Sorting describes the distribution of grain size of sediments , either in unconsolidated deposits or in sedimentary rocks .. grain size. Particle size ( grain size ). unconsolidated. unconsolidated. This should not be confused with crystallite size , which refers to the individual size of a crystal in a solid .. crystallite. crystallite. Crystallite is the building block of a grain .. Very poorly sorted indicates that the sediment sizes are mixed -LRB- large variance -RRB- ; whereas well sorted indicates that the sediment sizes are similar -LRB- low variance -RRB- .. sediment. sediment. variance. variance. The terms describing sorting in sediments - very poorly sorted , poorly sorted , moderately sorted , well sorted , very well sorted - have technical definitions , and semi-quantitatively describe the amount of variance seen in particle sizes .. variance. variance. In the field , sedimentologists use graphical charts to accurately describe the sorting of a sediment using one of these words .. sediment. sediment. sedimentologists. sedimentology. The degree of sorting may also indicate the energy , rate , and / or duration of deposition , as well as the transport process -LRB- river , debris flow , wind , glacier , etc. -RRB- responsible for laying down the sediment .. sediment. sediment. deposition. Deposition ( sediment ). river. river. debris flow. debris flow. wind. Aeolian processes. glacier. glacier. Sorting of sediments can also be affected by reworking of the material after deposition , for instance , by winnowing .. deposition. Deposition ( sediment ). winnowing. Winnowing ( sedimentology ). Well sorted rocks are generally porous , while poorly sorted rocks have low porosity .. porosity. porosity