Book Chapter
Sudden appearances of Silurian conodont lineages: Provincialism or special biofacies?
Author(s)
-
Published:January 01, 1984
Many conodont lineages that appear in the Ludlovian on Gotland and elsewhere have no known earlier record anywhere. The closest relatives are found not in the earliest Ludlovian but in the latest Llandoverian-earliest Wenlockian or in still older beds. Ordinary biofacies and lithofacies models fail to explain the observed distribution, since such lineages appear in all of the different facies identified. Either these lineages evolved in an as yet unsampled province, the isolation of which broke down gradually during the Ludlovian, or their appearance reflects changes in the chemistry of the seawater. If the latter interpretation applies, then it indicates...
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GSA Special Papers
Conodont Biofacies and Provincialism
Author(s)
Geological Society of America

Volume
196
Copyright:
© 1984 Geological Society of America
Geological Society of America
ISBN print:
9780813721965
Publication date:
January 01, 1984
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