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A. The mean weight (n = 9) by host source of sand deposited as backfill in chambers (excluding the weight of the host sand); B. The mean weight of backfill from other layers deposited in each host layer; C. The percent of the backfill in each host layer that came from another colored layer (n = 9). Kruskal-Wallace test by host layer (n = 5, or n = 6) showed B and C, but not A to vary significantly.
