Abstract

Ostracoda are probably better indicators of past sea level than has hitherto been realized. This is so because very characteristic low diversity, high productivity faunas occur in the upper reaches of the estuarine environment. Moreover, a fair amount of knowledge exists concerning their ecology. Details are given on the faunas that are present in each estuarine facies, and on how death assemblages can be distinguished from life assemblages. Sea level can be estimated to an accuracy of 50 cm to 100 cm in some NW European microtidal areas, but further research is required on macrotidal coasts to ascertain whether they can be used to pinpoint sea level here. Examples of where Ostracoda have proved of value in sea‐level studies are given for North Denmark, The Netherlands, East Ireland, and the Gulf of Gascony.

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