Ichnology of the Palaeogene Richmond Formation of eastern Jamaica - the final chapter?

Previously unrecorded ichnotaxa from the Palaeogene Richmond Formation of eastern Jamaica, namely Cosmorhaphe cf. gracilis, Helminthoida crassa, Paleodictyonl isp. and Taenidium cameronensis, are described. The ichnotaxa are assigned to a previously defined deep-water Scolicia ichnocoenosis characteristic of turbiditic strata. The general exclusion of graphoglyptids in these strata is believed to reflect a combination of the relatively shallow- water depths in which the turbiditic strata accumulated, the abundant organic matter available for biological consumption, and the existence of fluctuating dysaerobic/anoxic and oxygenated conditions at, or immediately below, the sediment-water interface.