The late Cenomanian oceanic anoxic event in the western Anglo‐Paris basin and southeast Danish‐Polish trough: Survival strategies of and recolonisation by benthonic foraminifera

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Abstract
Prolonged dysaerobic conditions probably caused the extinctions recorded within many of the late Cenomanian marine benthonic foraminiferal community. The surviving low diversity assemblage contains morphotypic associations that may be recognised over a wide geographical area. Environmental pressure selected for low oxygen tolerant infaunal forms and others that could readily adapt to this mode of life. The recolonisation by the benthonic foraminifera was very slow, in the western Anglo‐Paris Basin and in the southeast Danish‐Polish Trough, in contrast to the planktonic foraminifera. This may be a result of several influences: low migration rates of benthonic foraminifera, appreciably deeper water, the persistance of oxygen‐poor water at depth and/or changes in substrate induced by the radically different Turonian carbonate facies.