A large percentage of Reticypris sp. were also found as articulated carapaces in this
unit. It has been noted by De Deckker (2002) that the presence of intact carapaces indicates a fatal environmental change followed by rapid sedimentation to preserve the carapaces. These observations therefore agree well with repeated pulses of sediment and freshwater input in a near-shore deltaic environment, possibly going along with some oscillations in lake level.