Why would a sample that is known to have had a detailed grain-size analysis not appear in the output data?
Grain-size analyses are scanned to check that they are in good order, and some are rejected. An analysis with any phi interval is acceptable, provided it is detailed enough to resolve particular fractions. Analyses that have a significant weight percent in the finest and coarsest classes are treated as suspect because this implies that the part of the sediment that was analyzed probably does not represent the whole sediment.
