To examine differences in the percent weight of trapped sediments within three distinct mineralogical classes (carbonate, clay, and quartz) three-factor partially nested ANOVA models were employed (Factors: (1) Season (fixed factor)—2 seasons, (2) Shelf (fixed factor)—3 shelf locations, (3) Month nested within Season×Shelf (fixed factor)—3 months per season). Each mineralogical type was arcsine square root transformed to meet the assumptions of ANOVA (Underwood, 1981). Significant differences were interpreted using Tukey's HSD multiple comparisons test (Quinn and Keough, 2002). Due to multiple testing a Bonferroni transformed experiment-wise α=0.0166 was employed to reduce type 1 error rates ( Quinn and Keough, 2002).