erathem

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erathem The chronostratigraphic unit that is equivalent to the geologic-time unit era. An erathem comprises a number of systems grouped together and takes its name from the corresponding era, e.g. the Mesozoic Erathem would refer to the rocks laid down during the Mesozoic Era. At present it is a little used term.

A Dictionary of Earth Sciences AILSA ALLABY and MICHAEL ALLABY

erathem

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erathem See era.

A Dictionary of Ecology MICHAEL ALLABY

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