Author:
HARPER E. M.,PALMER T. J.,ALPHEY J. R.
Abstract
Sedimentological evidence suggests that sea-water chemistry
has oscillated between ‘Aragonite’ and ‘Calcite’
seas during the
course of Phanerozoic time. During ‘Calcite’ sea periods aragonite
was soluble and dissolved on the sea-floor. Here we propose,
using a survey of familial diversity, that during times of
such corrosive seas bivalved molluscs which secreted their
shells entirely of aragonite were at a selective disadvantage
compared to those with calcitic outer shell layers. This is the
first case in which it has been suggested that there was a
dynamic link between sea-water chemistry and the evolution of
a particular taxon throughout Phanerozoic time.
Publisher
Cambridge University Press (CUP)
Cited by
69 articles.
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